- Canned Motor Pumps
for chemicals & petrochemicals
- Magnetic Drive Pumps
- Liquid Ring Vacuum Pumps & Systems
The canned motor pump is an integral, compact unit without shaft seal. This type of pump combines the rotating part of the pump hydraulics with the rotating part of the motor on a common shaft. The pump shaft is completely enclosed by a tightly welded rotor lining that separates the rotor assembly from the stator of the drive motor. This design principle eliminates the need for shaft seals (e.g. mechanical seals or shaft bushings) and prevents leakage. Therefore, canned motor pumps are also called 'sealless' or 'hermetically sealed'.
Technical Basic Specifications:
up to 1.600 m³/h
up to 2.300 m
up to 1.200 bar
up to 300 mPas
- 160 °C up to + 450 °C
Benefits of Canned Motor Pumps
- hermtically sealed / sealless
- different versions possible:
- high pressure
- high temperature
- different types of installation possible:
- single stage / multi stage
- chilled / heated
- motor diven / magnetic driven
Magnetically coupled pumps are a combination of conventional pump hydraulics with a permanent-magnetic drive system and a three-phase motor. This system uses the attraction and repulsion forces between permanent magnets in both coupling halves for contactless and slip-free torque transmission. Between the two coupling halves equipped with magnets is the can separating the product space from the surroundings. The hermetic leak tightness of the magnetically coupled pumps is ensured by a single-acting safety casing. Magnetically coupled pumps are used particularly for toxic, odour-intensive or otherwise hazardous pumped media as the can shields the medium hermetically from the surroundings.
Technical Basic Specifications:
up to 700 m³/h
up to 270 m
up to 25 bar
up to 100 mPas
- 40 °C up to + 350 °C
A liquid ring vacuum pump is a rotary displacement pump in which an eccentrically mounted rotor with fixed blades pushes a liquid against the wall of the stator (housing). The liquid takes the form of a ring concentric to the stator and forms together with the rotor blades several spaces with changing volumes. The pumps can be manufactured conventionally as well as hermetically sealed with magnetic drive or canned motor drive. The leak tightness of these pumps is particularly important when it comes to pumping highly toxic, carcinogenic or radioactive gases and / or vapours where leakage of operating liquid is unacceptable. The main field of application is in the chemical industry and in process engineering for the extraction and compression of dry and above all moist process vapours.
Technical Basic Specifications:
up to 3.000 m³/h
min. 33 mbar (abs)
up to 2.500 mbar
- 20 °C up to + 100 °C
Benefits of Liquid Ring Vacuum Pumps
- various methods of shaft sealings
(single mechanical seals / double mechanical seals / hermetically sealed)
- magnetic couplings / canned motors
- wear free
Type LVPH - canned motor design
Type LVPM - magnetic coupled design
Type LVPG - mechanical seal design
Fon: +49 761 5830-0
Fax: +49 761 5830-280
Mr. Frank Hofer
Consulting, Sales, Service
Fon: +49 761 5830-9060
Mobile: +49 172 7205388
Contact to local Offices:
HERMETIC-Pumpen GmbH holds a world-leading position in the global market of seal less pumps. HERMETIC operates its own sales and service organisation throughout Germany, several European countries, North America and China. They assure world-wide coverage through long established partnerships with carefully selected independent agents and distributors in more than 50 countries.
Our product range
- Canned Motor Pumps
- Magnetic Drive Pumps
- Liquid Ring Vacuum Pumps & Systems
- standard pump designs and special designs
- tailor made alternatives for specific customer needs
Publications & Brochures
HERMETIC canned motor pump used in Lavazza's decaffeination process
The Italian company Lavazza relies exclusively on a CO2 extraction method to remove caffein from coffee beans. The process makes use of high-pressure CO2 in a supercritical state. Due to its high compressibility, the supercritical aggregate state of CO2 poses a challenge for process stability. In conjunction with the high temperatures and extremely low viscosity of the fluid, the process places high demands on the equipment installed. A canned motor pump designed and produced by HERMETIC-Pumpen GmbH is employed as circulation pump. The compact unit in high-pressure design, including monitoring equipment, ensures a reliable flow of CO2 through the coffee beans. Thanks to pumps’s low-wear and low-maintenance design, caffeine can be extracted in a 24-hour operation without compromising the service life.
Supercritical carbon dioxide is in a supercritical state above its critical temperature and pressure. Its properties lie between those of a gas and a liquid: it has the viscosity, compressibility and diffusivity of a gas and the density and solubility of a liquid. It can easily penetrate other substances and extract the desired substances from them. Due to its natural qualities and the purity of the end product, it is mainly used in the food and pharmaceutical industries. One example is the decaffeination of coffee beans.
Lavazza: "natural" decaffeination CO2 process.
Decaffeination is a process to extract the caffeine from the coffee beans while they are still green. Lavazza only uses the CO2 method. Decaffeination takes place through a "natural" process where all elements that come into contact with the product during the various processing steps are suitable for food use.
In the Lavazza plant located in Pozzilli in the Italian region of Molise - put into operation for this purpose in 1991 - the green coffee beans are first swollen by increasing their moisture content to over 35% with the addition of drinking water. The beans are then directed into an extractor (autoclave) where carbon dioxide flows under supercritical conditions. With this process, the caffeine is extracted from the coffee beans and then recovered. At the end of the extraction phase, the autoclave containing the coffee is depressurised and the coffee is transferred to the next drying phase. In this processing step, the coffee beans are dried until they reach a moisture content of less than 11 %.
High pressure, high temperature, low viscosity
Using CO2 in a supercritical state of aggregation is the key for a successful caffeine extraction. The prevailing high temperature results in extremely high vapor pressure at the lowest viscosities. This represents an extraordinary challenge for the centrifugal pump. The mixture of CO2, water and caffeine may also lead to residues, flowing through the pump.
Hermetically sealed pump solution in high-pressure design
For conveying the supercritical CO2 through the extractor, Lavazza relies on a centrifugal canned motor pump from HERMETIC-Pumpen GmbH. The high-pressure multi-stage centrifugal pump, type CAMHV ensures the reliable delivery. The process conditions foresee a pressure of over 200 bar, a temperature of over 80 °C and a CO2 flow of more than 140 m³/h. In canned motor pumps, the motor and the hydraulic components are part of one block with rotor and impellers being arranged on a common shaft. The rotor is supported by medium-lubricated radial bearings. The stator of the drive motor is separated from the rotor chamber by a stator tube. The rotor chamber forms a common space with the housing part of the pump.
A low-wear design principle for 24-hour continuous operation
Thanks to its integral and compact design, the canned motor pump does not require shaft seals, conventional bearings or couplings. This is an advantage over pumps with mechanical seals that are more susceptible to the pressures and temperatures prevailing in the extraction process. The pump also runs very low noise emission.
The HERMETIC technology "ZART" (Zero Axial and Radial Thrust) ensures that the rotor unit runs without contact and wear. ZART is based on comprehensive axial thrust balancing using non-contact hydrodynamic plain bearings. The pump was installed in vertical position to accommodate the low viscosity of the pumped medium and the resulting reduced bearing load capacity. In this case, the plain bearings do not have a rotor load support function, but only a guiding function. The rotor weight is carried hydrostatically. This design allows the rotor to work in continuous operation without wear and mechanical contacts. This enables caffeine extraction in continuous operation for several years. Another advantage of the vertical installation is to facilitate the pump degassing operations.
Reliable axial thrust balancing with rotor position monitoring
In canned motor pumps, the axial position of the pump shaft balances itself automatically during operation. This establishes a force-free state of equilibrium automatically and no axial forces act on the axial bearing collar of the plain bearings. In the pump installed in the Lavazza plant, an axial control disc ensures axial thrust balancing. The pump is equipped with the HERMETIC rotor position monitor “MAP” to monitor the axial rotor balancing during operation of the pump. The rotor position monitoring detects the slightest deviation of the rotor outside the permissible range and serves as an early warning system to prevent undesirable operating conditions.
Knowledge and experience in the most unusual applications
With this demanding application, HERMETIC demonstrates decades of experience in hermetically sealed pumps even in complex and critical processes. In close cooperation with customers, HERMETIC is constantly introducing new applications to the market. This makes HERMETIC one of the leading manufacturers of hermetically sealed pumps worldwide.
Source & Picture: HERMETIC-Pumpen GmbH
HERMETIC canned motor pumps enable secure handling of hot fluids
Whether providing process heat or fulfilling the pumping process - in numerous industrial and technical processes, the pump technology used must cope with extremely high temperatures and the high pressures that often accompany them. With leakage-free and durable canned motor pumps, HERMETIC-Pumpen GmbH offers a comprehensive pump concept that has several advantages over other pumping technologies in high-temperature applications. The self-cooled and externally cooled series up to API685 including different motors for high temperatures and heat exchanger variants as well as suitable measurement and control technology offer system operators a pump solution perfectly matching their application. The secondary containment and other design features ensure safe and continuous system operation with low life cycle costs.
Heat is one of the most important parameters in process engineering. Many chemical processes can only take place at high and defined temperatures. The centrifugal pump takes on two important tasks: Firstly, it transports the heat safely and efficiently to the process engineering consumers, and secondly, it conducts the pumping within the high-temperature process chain.
CNPK Canned motor pump with heat exchanger
Providing the process heat for consumers
An indirect supply of heat using heat transfer fluids is required for the exact setting or situational adjustment of the required temperature levels. A circulating heat transfer medium is used for heat transfer between the heater and the heat consumer. A circulation pump keeps the circulation going.
For temperatures up to 200°C, water is usually used as a heat transfer medium due to the high specific heat capacity of water and the low environmental impact. Due to the strong increase in vapour pressure at temperatures above 200 °C, organic heat transfer fluids are used above this temperature instead of water. However, these fluids are not always harmless as many of them are not environmentally safe. They can also pose a major hazard potential, for example, when the flashpoint of the medium is below the operating temperature and an ignitable mixture develops during leaks. The elevated temperatures require careful selection and installation of the equipment used for the heating circuit. Hermetically sealed pumps are considered the safest.
Demanding conveying task within the process chain
When pumping the process liquid within the process chain, the pump is often confronted with difficult operating conditions: elevated temperatures may be accompanied by high pressure that can reach several hundred bar. A high solidification point of the liquid may also cause problems in meeting the pumping requirements requiring a specific, often costly, heating solution for the pump. The presence of solids such as catalysts may pose a serious challenge to the mechanical seal used in standard chemical pumps.
Challenges in hot applications: Forces and moments on pump nozzles
In high-temperature applications, pump technology must overcome demanding mechanical challenges. The elevated temperatures cause thermal expansion of the pump housing. The piping acting on the pump nozzles can develop strong forces and moments.
For temperatures up to +320 °C, standard chemical pumps are usually used (with mechanical seals and foot mounted on the base plate) separated from the conventional motor by a thermal barrier. If compensators are not used - as is often the case - at temperatures above +320 °C, the forces and moments of the piping system are transferred directly to the pump nozzles.
This may lead to distortion and even deformation of the pump housing. On the one hand, these forces must be absorbed by a correspondingly strong housing. On the other hand, the temperature-induced expansion of the pump housing can be distributed evenly upwards and downwards by using centerline-mounted support (pump feet) as stipulated by API685. For temperatures above +320 °C and up to max. +450 °C, a hermetically sealed pump concept based on API 685 is therefore often the better solution.
Thermal break barrier, mechanical seal, coupling
A challenge of standard chemical pumps is the thermal barrier required between pump and motor. At high temperatures, large dimensions are often necessary in this case compared to hermetically sealed pumps. Another advantage of hermetically sealed designs is the elimination of leakage issues at the shaft passage. Canned motor pumps offer additional protection: thanks to their secondary containment, no pumped liquid escapes to the outside even when the stator can (lining) is destroyed. The omission of mechanical seals susceptible to wear and failure ensures increased process reliability, especially in chemical reactions with catalysts. The integral and compact monobloc design eliminates the need for shaft alignment. This eliminates the need for mechanical couplings, coupling protection and often complex base plate constructions. The pump and motor are continuously aligned preventing vibration due to thermal expansion and the associated damage to bearings.
Canned motor pumps for high-temperature applications
Often designed for extreme conditions, canned motor pumps are used when liquids and gases with extreme temperatures and potential hazards are pumped. These completely enclosed centrifugal pumps in monobloc design are driven by a canned motor thanks to a common shaft using electromagnetic principles. A partial flow is used to cool the motor and lubricate the two identical hydrodynamic slide bearings. After flowing through the gap between rotor and stator, the partial flow is fed back through the hollow shaft to the pressure side of the impeller. For high-temperature applications, HERMETIC offers two distinctive designs: canned motor pumps with externally cooled motors and canned motor pumps with adequate internally cooled motors.
Canned motor pumps with externally cooled motors
In this concept, the pump and canned motor are separated from each other by a short intermediate piece for thermal decoupling. This prevents the transfer of heat from the pump to the motor. A long, narrow annular gap equalises the pressure between the hydraulics and the rotor chamber. An auxiliary impeller is installed in the motor that circulates the fluid of the same type in the rotor chamber through an external cooler arranged around the motor or mounted separately. The thermal loss from the motor is absorbed by a coolant. This creates two delivery circuits with different temperature levels. The operating circuit can be approved for temperatures up to +480 °C, while the pumped liquid of the secondary cooling / lubricating circuit has significantly lower temperatures of +60 °C to +80 °C. The motor winding can therefore be designed using the durable insulation class H (H-180 winding, up to 180 °C). As a result of the pressure equalisation in the annular gap of the thermal barrier, there is virtually no fluid exchange between the two temperature levels. By using a separate cooling circuit, it is not necessary to cool the motor part flow from the high operating temperature level to a value permissible for normal canned motors and return it to the delivery flow. This would cause excessive energy loss. This cooler variant or layout can be used with single and multi-stage canned motor pumps. Depending on the use and application, this version is equipped with a plate or tubular heat exchanger. If no cooling water is available, air coolers of diverse designs can also be used. Available are simple honeycomb coolers with fans that are arranged above the unit and attached to the base plate. For larger pump outputs, separately installed system dry-air coolers with axial fans are used.
Canned motor pumps with self-cooled internally cooled motors
If not enough or no cooling liquid of sufficient quality is available for motor cooling, another design must be used. For pumped media of various types, it is also necessary to heat the pumped medium both in the pump and in the canned motor before start-up. The temperatures required in this case are usually in a range that exceeds the maximum permissible temperature for the aforementioned insulation class H. This is where the canned motors with the special winding of insulation class C (C-220 winding, C-400 winding) are used. With the so-called "high-temperature motors", various pumping operations in the high-temperature range can be easily solved. Silicone ceramic is used as the insulation material applying suitable measures to prevent the copper wire from oxidising. Windings of this type can manage constant temperatures of +450 °C in the winding ends. This allows economic motor loads up to +400 °C (temperature of the pumped medium). Fins arranged centrally on the motor housing improve heat dissipation through natural convection in self-cooled canned motors.
The performance range of the HERMETIC pump portfolio
As a specialist for canned motor pumps, HERMETIC-Pumpen GmbH offers various series that are suitable for high-temperature applications. The portfolio includes self-cooled pumps for liquid gases, boiling media and condensates, externally cooled pumps for hot organic heat transfer oils and heating bath liquids including design variants according to API685. The performance range covers fluid temperatures up to +480 °C, system pressures up to 120 MPa and power ratings up to 690 kW.
The rotor lining, one of the HERMETIC's core competencies, is manufactured using the extrusion process and, as a nickel-based alloy, is an essential part of the highly efficient canned motor. In the flameproof encapsulated version, the canned motor complies with the explosion protection according to Directive 2014/34/EU.
Source & Pictures: HERMETIC
HERMETIC supplied two 12-stage, sealless, canned motor pumps CAM
During the modernisation of an ethane cracker plant, HERMETIC-Pumpen GmbH supplied two 12-stage, sealless, canned motor pumps from the CAM 32/6 + 6 series. With this petrochemical plant, the provision of raw materials to the company-owned plastics manufacturers at the integrated site is ensured.
The supplied canned motor pumps, with “tandem” design, convey the medium [C3 fraction with propylene as main constituent] at a temperature of 22°C. The differential head [H] is 379 m at a flow rate [Q] of 7.8 m³/h. The pump units are designed for a nominal pressure of 40 bar and have temperature- and level-monitoring features. For online monitoring of the hydraulic axial bearing, a rotor-position monitoring feature is also provided.
Thanks to the special tandem design of the multistage pumps, these machines are truly one-of-a-kind on the market. The unique arrangement of pumping stages results in minimal shaft deflection and load relief at the slide bearings. The “ZART ®” (Zero Axial and Radial Thrust) technology from HERMETIC ensures a contact- and wear-free running of the rotor unit.
As canned motor pumps generally contain no failure-prone components such as shaft seals, couplings and friction bearings, this technology is particularly suitable for extremely difficult operating conditions. The leakage-free pump design ensures the safe handling of hazardous and valuable products, while high availability and long service life time are characteristic features associated with it. Moreover, these hermetically-sealed pumps help to enable applicable environmental and work safety requirements to be met.
Previously, the „Noretyl AS“ had only used conventional centrifugal pumps with dynamic shaft seals in use. In light of the challenging service and the desire to increase system availability and minimise maintenance costs, the customer came to a realization that an alternative pump technology need to be adopted in order to meet the relevant requirements.
After a detailed evaluation of the possible solution, the „Noretyl AS“ opted for the canned motor pump. The decisive factors were the high level of safety offered by the sealless (and thus leakage-free) design along with the absence of wear parts and, consequently, longer maintenance intervals.
In operation canned motor pumps are convincing by easy installation and commissioning, compact footprint, quiet and vibration-free running and a comparatively small amount of instrumentation.
HERMETIC has been supplying canned motor pumps to the petrochemical industry for decades. Such pumps are used both in Greenfield projects and for replacement for problematic pump units in existing plants.
Standard models and customised pump solutions can be designed in compliance with the technical oil and gas directive API 685.
HERMETIC can provide reliable solutions for virtually any type of pump usage, from simple applications to the conveyance of conventional liquid gases and right through to cryogenic applications. Even extreme process parameter such as system pressures of 120 MPa and temperatures of 450 °C do not present any difficulties for the proven canned motor pump technology.
Source & Picture: HERMETIC-Pumpen GmbH
Free online event for professional pump users
At "Digital Days by Star Pump Alliance", HERMETIC-Pumpen GmbH will showcase applications, technical knowledge and solutions for the safe, trouble-free operation of canned motor pumps. Experts from HERMETIC will provide insights into the design details of canned motor pumps, influences on system parameters and tips for smooth operation. In a further live session, participants will have the opportunity to take part in designing a pump using the HERMETIC online configurator. Participation in the 2021 “Digital Days” is free of charge. Over two days, the combination of conference and trade fair on 28 and 29 September 2021 bundles the extensive knowledge of all members of the Star Pump Alliance specifically targeted at professional pump users.
Registration at: spa-digitaldays.com
2 days of knowledge exchange about pump technologies
Whether chemical and pharmaceutical, food and beverage, oil and gas, pulp and paper, waste water, tank systems, construction, cleaning, marine, refrigeration and air conditioning or mining - "DIGITAL DAYS BY STAR PUMP ALLIANCE" uses innovative event technologies to offer a complete package of interaction and insights around pump technologies to representatives of all sectors of industry. This means, for example, that products can be compared and experienced in detail using virtual 3D models. Spontaneous chats or pre-booked 1:1 conversations allow an individual exchange with the manufacturers. The highlights of the event are the keynotes from selected industry experts, streamed live from an XR studio. Viewers can ask questions and experience a professional exchange on a high level.
As a member of the Star Pump Alliance, HERMETIC will be present with 2 live sessions:
Session 1: HERMETIC V-Line - live online configuration of tried and tested model ranges
HERMETIC presents its modular “V-Line” pump concept, which brings together tried and tested pump series and designs for common areas of application in the chemical and petrochemical industries. Based on a standardised production process, the HERMETIC V-Line offers chemical plant operators fast delivery of customised, price-optimised canned motor pumps in a predefined application template. Participants learn how they can use the HERMETIC Expert Tool, an online pump configurator, to design their canned motor pump in less than two minutes. An expert from HERMETIC guides you through the pump selection live.
Session 2: The canned motor pump from the perspective of the manufacturer and operator
HERMETIC illustrates the differences between a conventional pump and a canned motor pump and explains the design and practical challenges. The focus is on the exchange of knowledge between manufacturer and operator on topics such as drive system, storage and materials and their influence on system parameters. Questions about design and tips for smooth operation round off the specialist session.
Participation in the SPA Digital Days is free of charge. Registration at: spa-digitaldays.com
Source & Graphic: HERMETIC-Pumpen GmbH
HERMETIC supplied two canned motor pumps as replacement to conventional submersible pumps
2 maintenance-free slide bearings + 1 meter shaft = 15 meters immersion depth. The new mathematics of submersible pumps.
Canned motor pump technology provides significant advantages and often constitutes a low-priced alternative to conventionally sealed pumps and magnetically coupled installations with external drive, for example due to the omission of long shafts or complex cooling and lubrication systems for mechanical seals.
As a replacement to conventional submersible pumps, HERMETIC-Pumpen GmbH supplied two 8-stage, sealless canned motor pumps of the TCAM 30/4+4 series. The distinctive feature of the transformation was the customized adaptation of the pumps to the existing plant and its vessels. The pumps were designed for easy installation in the existing tank (with a diameter of 500 mm). The customer, a Swiss fine chemicals company, thus saves the costly, time-consuming conversion of the existing systems in its production plant.
The supplied submersible pumps are the longest pumps that HERMETIC has ever produced. With an immersion depth of more than 15 meters - and a pump shaft of only 1 meter - the challenges ultimately lay in adapting to the operator's existing plant as well as in the internal and external logistics. At the customer's request, the pumps were produced in full length and therefore special transport was required for delivery.
The submersible pumps, in tandem design, convey the medium [NH3] at a temperature of -33°C. The delivery head [H] is 260 m at a flow rate [Q] of 12 m³/h. The pump units are designed for a nominal pressure of 40 bar and are suitable for operation with frequency converters [30-60 Hz].
The special features of the technology.
Thanks to the hermetically sealed design of the drive unit, which consists of hydraulic system and motor, it can be completely immersed in the vessel or tank. Only the discharge pipe and the electrical connection are routed through the tank cover via the manhole plate and out of the vessel. This provides the operator with significant advantages:
The fluid-lubricated slide bearings of the canned motor guide a short shaft on which the rotating parts of the motor and the hydraulic system are combined. The “ZART ®” (Zero Axial and Radial Thrust) technology from HERMETIC ensures non-contact, wear-free operation of the rotor unit. Some installations operate wear-free for many years with no maintenance requirements. Customer studies show that the MTBF times of this technology are many times longer than those of a conventional installation.
Monitoring the condition of submersible pumps is much more difficult than monitoring the condition of units that are located outside. The HERMETIC canned motor pump provides a monitoring concept that oversees the safe operation of the pump via installed sensors. In addition to operating temperature, liquid level and motor load, the specially developed MAP system can also be incorporated. This system continuously monitors the position of the rotor and is therefore a reliable indicator of unintended operating states and wear.
Canned motor pumps excel in cryogenic applications. The efficiency of electric motors decreases with rising temperatures. The canned motor is cooled and kept at a low temperature by the pumped medium, which makes it particularly efficient. Since no dynamic seals and conventional bearings are used, the hermetic pumps provide enhanced reliability and durability in this application.
In the past decades, the canned motor has proven its value as a low-maintenance, reliable drive for submersible pumps in the chemical and petrochemical industry. Equipped with state-of-the-art monitoring devices and thanks to its compact design, this technology often provides a simple, cost-effective and very reliable alternative to conventional shaft seals or magnetically coupled submersible pump versions.
Immersion depth: 15.70m; shaft length of pump: 1m; slide bearing: 2 pcs.
Source & Picture: HERMETIC-Pumpen GmbH
HERMETIC canned motor pumps for design and construction of the Olympic ice canal
Olympic bobsleigh, skeleton and luge track, Beijing 2022
With a competition length of 1,615 metres and 16 curves, the largest artificially-iced bobsleigh, luge and skeleton track in the world is currently under construction not far from the Great Wall of China. The so-called "National Sliding Centre" is being built for the 2022 Winter Olympics near Beijing. The combined track for bobsleigh, skeleton and luge will accommodate 10,000 visitors. For the athletes, the artificial ice canal holds high technical difficulties with innovative passages. In the background, sophisticated technology ensures perfect and constant competition conditions as well as safety according to high European standards. Responsible for the planning is the Stuttgart planning office Deyle (PBD) that won the state tender for the Olympic facility. The contract for the foreign share in the implementation of the entire refrigeration concept was awarded to air conditioning refrigeration specialist Johnson Controls. Hermetically sealed canned motor pumps from HERMETIC-Pumpen GmbH ensure a safe and reliable supply of ice. The pump types used include standard refrigerant pumps and custom-made products specially developed for the application.
Track and refrigeration design
One of the most complex operations in the artificial ice business is designing and building a bobsleigh and luge track. When planning an ice channel, the track is designed first. After the "Refrigeration Design" follows the planning/design/construction of the refrigeration system including all refrigerant lines along the track and the heart of the entire system, the refrigerant pumps. Track design and refrigeration design from a single source are what the new sports facility needed. This has the enormous advantage that all concepts are perfectly coordinated and no compromises are necessary.
Demanding requirements for refrigeration technology
The challenge in refrigeration design: The cooling system must produce a consistent, flawless ice surface over the entire length of the track. The ice surface must withstand the weight of the bobsleighs, but also compensate for changing weather conditions and temperature fluctuations to ensure that all athletes find the same competition conditions. Also, the enormous differences in elevation and the course of the sun result in different climatic conditions along the bobsleigh track that affect the ice differently in the various sections of the track.
The planners must have a high level of knowledge and experience that few in this industry have. In addition to the planning, the components used - especially the refrigerant (canned motor) pumps - are of great importance. "Bobsleigh tracks with their constantly changing loads and numerous segments to be cooled with elevation differences of up to 130 metres place extreme demands on the refrigerant pumps", says PBD Managing Director Uwe Deyle, who is considered one of the leading experts in this sector having planned twelve artificial-ice bobsleigh tracks including six Olympic tracks. Deyle and Johnson Controls decided to use canned motor pumps from HERMETIC-Pumpen GmbH to pump the refrigerant.
Varying pressure requirements due to different pumping heads
An ammonia (NH3) refrigeration system is used to produce the ice. The NH3 is pumped at -18 degrees Celsius. The toxic effect of ammonia requires the highest level of safety and leak-tightness of the system and the individual components. The pumps are located in the engine house, from where they transport the refrigerant through seemingly endless pipes in the concrete structure to the furthest point on the track. The pumping head at this point is 249 metres. The best possible icing requires the optimal supply of ammonia to all points of the track. Therefore, the track is divided into four zones. Four HERMETIC canned motor pumps ensure a safe and efficient refrigerant flow. The pumps are ideally suited to the different elevations of the various track sections and the associated pressure requirements. Each zone uses one pump. A second one is provided as a backup as in almost all chemical plants. Although a technical failure of the pumps can virtually be ruled out, continuous operation cannot be guaranteed due to any incorrect operation of the system.
Completely leak-free, low-wear and low-maintenance pump technology
In contrast to magnetic-coupling or centrifugal pumps with mechanical seals, canned motor pumps do not have any vulnerable dynamic seals. Instead, canned motor pumps have a second hermetic safety containment that prevents any leakage of pumped media and emissions. The design-based omission of wear-prone components such as shaft seals, couplings and roller bearings ensures a high degree of operational safety, almost negligible wear and the best MTBF (Mean Time Between Failure) values compared to other pump technologies. "Every canned motor pump from HERMETIC features sophisticated technologies. These include, for example, the unique ZART® principle by HERMETIC. If the pump is running at the duty point, there is no contact between rotating parts. The complete compensation of the axial forces in conjunction with hydrodynamic slide bearings guarantee extremely high reliability in the operator's processes. This drastically reduces the life-cycle and operating costs of a canned motor pump,” explains Alexander Frank, Area Sales Manager who oversees the project at HERMETIC.
Widest range of canned motor pumps, fast delivery and worldwide service
With the three product lines S-Line (24 standard types), V-Line (more than 400 variant pumps) and E-Line (engineered-to-order) geared towards the requirements of the refrigeration industry, HERMETIC offers the largest portfolio of canned motor pumps for industrial refrigeration technology on the market. Pumps from all three product lines are installed in the Olympic ice channel in Beijing. Uwe Deyle has already trusted the technology and quality of HERMETIC canned motor pumps several times. “With its pump portfolio, HERMETIC covers all - sometimes even the most extreme - requirements that no other manufacturer can meet. The advice is excellent and the pumps have a problem-free service life of several decades in practice,” says Uwe Deyle with conviction. HERMETIC pumps now ensure perfect ice in four World Cup and ten Olympic facilities with the highest level of safety for people and the environment.
Zone I: Custom designed canned motor pump for a pumping head of 249 metres
A multi-stage canned motor pump of the type CAM 42/6, N74rm-2 is used to supply Zone I that includes the highest point of the bobsleigh, luge and skeleton track. With its extremely favourable NPSH values, the CAM series - depending on the pump type - enables the operation of the pump with very little inflow of the pumped medium. This also results in a relatively low space requirement. The required suction head in the engine house, where the pump is located, is only 2.8 metres. As an individually developed pump of the HERMETIC E-Line, the compact unit is designed for a delivery rate of 44m³/h at a pumping head of 249 metres. Six impellers in a row provide the necessary pressure increase.
Zones II, III and IV: Fast delivery thanks to preconfigured canned motor pumps
In zones II and III, a canned motor pump type CAM32/3, N34L-2 each from the HERMETIC V-Line ensures safe and controlled refrigerant flow. The pump has an inducer to reduce the required suction head. The delivery rate is 18.0m³/h at a pumping head of 139 metres.
In Zone IV, the pump with the smallest hydraulics is used. The five-stage CAM 2/5, AGX4.5 pump designed for a delivery rate of 3.9m³/h and a pumping head of 97 meters comes from the HERMETIC S-Line. All pumps meet the high HERMETIC quality standards including the ZART® principle for contact-free and wear-free operation. Alexander Frank explains: "With our HERMETIC V-Line and S-Line we draw upon standardised assemblies and prefabricated components. In conjunction with our realigned value stream-oriented production and the automated design process, this enables lean processing of projects. This offers building owners and plant manufacturers reduced development costs and valuable time advantage. The planning office completed the final clarification of the delivery content in September 2018 only four months after initial contact. Johnson Controls placed the order in February 2019. The S- and V-Line pumps were installed as planned in July 2019. The E-Line pumps were delivered also according to plan in December 2019."
Excellent cooperation, high service competence
Johnson Controls, one of the leading providers of industrial refrigeration technology and the world's leading company in the use of natural refrigerants, is also satisfied. Lambert Köppen service engineer at the refrigeration system manufacturer says: “Our systems are characterised by their environmental friendliness, high performance and cost-efficiency. The quality and reliability of the individual components are very important. We have had a good business relationship with HERMETIC for many years and are convinced of the quality of the pumps used. We have had an excellent experience, especially when it comes to reliability and long-term stability of the pumps. We also appreciate the good communication between the companies including the coordination with the planning office." Uwe Deyle adds: “In such time-critical projects of international importance observed by the public, not only the product quality but also the reliability and, particularly, the service competence of the partners involved play an immensely important role. Even when unexpected issues arise, the experts from HERMETIC's headquarter are on site within a few hours and show that they not only know their products but are also competent to technically evaluate the application due to their extensive experience. Planners and system builders cannot have better experiences with a manufacturer." Alexander Frank is pleased about the confidence and says: "Open, timely and success-oriented communication is enormously important for such a project, and this is exactly what has once again worked extremely well between all three parties in this case."
Source & Graphics: HERMETIC
The advantages of hermetical centrifugal pumps for process and production technology
Maximum safety and availability with the lowest life cycle costs - HERMETIC-Pumpen GmbH is showing at the "virtual process show 2020" (www.virtual-process.show) how processes can be made safer and more economical with centrifugal pumps. From September 8th to 11th, 2020, the new online trade fair offers a digital industry meeting point for all areas of process and production technology. Participation is free of charge, can be planned at short notice and can be taken from anywhere.
In the accompanying lecture program, HERMETIC offers a webinar on the selection and design of centrifugal pumps especially for planners and users in the chemical and petrochemical industry. The leading supplier of leakage-free and maintenance-free canned motor pumps will provide information on the technological features of its pump portfolio at the virtual exhibition stand. Via a live chat function, visitors can exchange ideas personally with application specialists from HERMETIC.
"Safety and economic efficiency are not mutually exclusive, even with critical conveying processes and difficult media in the chemical and petrochemical industries," says Dominik Hegen, Product and Application Management at HERMETIC. “With our participation in the“ virtual process show 2020 ”we want to offer planners and users in the process and production area know-how about sealless centrifugal pumps. This includes a free webinar “How to find the right centrifugal pump for your process”. Participants will find out when to choose a centrifugal pump, which types of centrifugal pumps are generally available, in which applications sealless centrifugal pumps are used and what differences, advantages and disadvantages in terms of safety, availability and life cycle costs magnetic drive and canned motor pumps have. We show a systematic procedure to decide which solution is the best for the individual application. The webinar will take place on three dates in English. Participation is free of charge."
The HERMETIC webinar - login information:
Title: “How to find the right centrifugal pump for your process”
Dates & registration links:
• 09/10/2020 at 3:00 p.m. -> app.virtual-process.show/en/webinars/34
• 09/10/2020 at 11:00 p.m. -> app.virtual-process.show/en/webinars/102
• 09/11/2020 at 7:00 a.m. -> app.virtual-process.show/en/webinars/103
Product and Application Management
Source & Graphic from provided by HERMETIC
HERMETIC is expanding its modular, configurable canned motor pump line for the chemical and petrochemical industries
HERMETIC-Pumpen GmbH, the world leader in the development and manufacture of leak-free and maintenance-free canned motor pumps, has further expanded its product line "V-Line" with four new T-motors. This increases the temperature range of the modular, configurable pump range from a maximum of 120 C to 180 C. By adding four motors with a power of up to 33 kW, the company is responding to the demand from chemical plant operators for the fast delivery of demand and price-optimised canned motor pumps even in the lower price range.
The new T-motors are available with outputs of 8.5 / 12.4 / 22.4 and 33 kW. C220 windings provide winding insulation. Other features for handling the high temperatures are fins attached to the housing for convection cooling, standard PT100 sensors and an offset terminal box.
New hydraulics are available
Responding to the industry-wide requirements for smaller standard hydraulics, hydraulic sizes 40-25-200 and 50-32-160 according to EN22858 for the V-Line chemical standard pump will be available from September 2020.
HERMETIC V-Line: modular canned motor pumps in over 500 pump-motor combinations
The V-Line launched by HERMETIC in 2019 is a modular canned motor pump system for common, predefined areas of application in the chemical and petrochemical industries. The range of applications now extends to pumping heads from 12 to 295 m, flow rates from 1.0 to 130 m³/h, fluid temperatures from -50 °C to +180 °C, power ratings from 8 to 48 kW and pressure ratings from 16 to 40 bar. There is a choice of single and multi-stage variants with different hydraulics, motor ratings and material versions including matching monitoring technology. Within these parameters, many pump-motor combinations can be configured with just a few clicks using an online design tool. Without exception, all pumps meet the high HERMETIC quality standards including the unique ZART® (Zero Axial and Radial Thrust) principle.
In conjunction with lean manufacturing and logistics processes, customers receive demand and price-optimised canned motor pumps in 8 to 12 weeks with 100 per cent delivery reliability.
Source & Graphic: HERMETIC-Pumpen GmbH
HERMETIC canned motor pumps are reliable and proven components
HERMETIC has the largest pump portfolio of hemetically canned motor pumps in the industry and does not only offer many standard designs, but also countless individual solutions. In addition to the single-stage canned motor pump of size 50-160, which is available with motor powers from 4.5 kW to 12 kW, the LC series provides the pump sizes 32-125 and 32-160 as standard solutions for railway applications and wind turbines.
With a delivery head of 59 m and a maximum delivery flow of 75 m3/h (1,250 l/min), the size 50-160 is the solution for high demands. This size proven itself for thousands of times as a hermetic refrigerant pump in industrial refrigeration. Designed for the conveyance of water-glycol mixtures in railway and wind turbines, this pump technology stands for safety, economy and reliability.
Individual, customer-specific adaptations such as a train-specific painting according to EN45545-2, Harting connector design or flexible pump installation are possible. Additional customer requests can also be realized through our flexible pump concept.
Source & Pictures: HERMETIC-Pumpen
HERMETIC donated a cutaway model of an NH3 pump to the SCHAUFLER Academy for trainings
Volker Stamer, Director of SCHAUFLER Academy, and Walter Reich, BITZER Application Consultant, are pleased with the cutaway model of the HERMETIC NH3 pump used for training purposes.
Since the opening of the SCHAUFLER Academy in February 2016, BITZER's international training centre also offers ammonia training. To promote practical experience, HERMETIC donated a cutaway model of an NH3 pump to the SCHAUFLER Academy that will be used in each NH3 (R717) training from now on.
The intensive training is aimed at all refrigeration specialists with many years of experience in synthetic refrigerants, CO2 and hydrocarbons. During this training, the attendees will get to know the specific features of the refrigerant ammonia. In addition, components of the refrigeration circuit are discussed that are used less or not at all with other refrigerants. This includes circuits where the refrigerant is pumped to refrigeration points.
HERMETIC-Pumpen GmbH is one of the renowned manufacturers of pumps for this specific application. For the SCHAUFLER Academy, HERMETIC-Pumpen GmbH supplied a cutaway model of a CAM 3/3 NH3 pump for training purposes. The cutaway model is useful for showing various details to attendees.
NH3 pumps and NH3 compressors are a bit apart in the NH3 circuit; however, when operating the refrigeration system, their interaction must be considered. The cutaway model of the HERMETIC NH3 pump is an asset for the SCHAUFLER Academy - the educational institute would like to thank HERMETIC for this generous loan.
Refrigerant pumps from HERMETIC: Highest quality - high availability
HERMETIC is known for decades for safety and reliability in the field of hermetically sealed centrifugal pumps. No matter which refrigerant is used, CO2, ammonia, water-glycol mixtures or Frigene - with the S-Line HERMETIC offers the largest pump portfolio for industrial refrigeration. Thanks to prefabricated assemblies, components and stocked series products in a quality proven thousand-fold, you will receive a perfectly suited product in the shortest possible time for seamless integration into your refrigeration system.
With a new major order now over 350 HERMETIC pumps for polyethene production have been installed
Two single-stage canned motor pumps from HERMETIC according to API 685, heatable
HERMETIC-Pumpen GmbH, a leading global developer and manufacturer of hermetically sealed pumps, recently received another major order from a Russian petrochemical plant for the delivery of 55 canned motor pumps. The order worth several million euros was placed for expanding the capacity of various production plant components.
The order includes single-stage and multi-stage canned motor pumps according to API 685, some of which can be heatable. Thanks to their second, hermetically sealed containment and without failure-prone shaft seals or wearing ball bearings, canned motor pumps achieve exceptionally long service lives with absolutely no leakage. All pumps are customer-specific, high-end solutions of the HERMETIC "E-Line" (engineered-to-order). The pumps guarantee the plant operator not only the highest level of safety for people and the environment but also high operational reliability and low life cycle costs. The 55 units are manufactured at the HERMETIC headquarters in Germany. Delivery is scheduled for mid-2020.
This is not the first order from this major customer for the Gundelfingen-based pump specialist. HERMETIC has received several orders from this customer over the past 15 years as part of a strategic development programme to modernise and expand production facilities. In the meantime, more than 350 HERMETIC pumps provide this customer with the highest availability and the greatest possible safety in a wide variety of system parts.
"This new major order is also an expression of confidence in the excellent partnership we have built up with our customers in Russia over the years", says Sebastian Dahlke, Managing Director and CCO of HERMETIC-Pumpen GmbH. "We maintain close contact between our headquarters, our representative office in Moscow and the respective contacts on the customer side. This not only includes reliable service over the life cycle of an installation. We always have our ear to the market and use our many years of experience in the oil and gas industry to assist our customers in building new plants and processes or expanding existing ones. This also creates a good basis for us to open up further development opportunities in the most important Eastern European market."
Single-stage canned motor pump type CNPF according to API 685 from HERMETIC with motor for thermal applications
HERMETIC has been supplying the Russian oil and gas industry for over 40 years. Russia is one of HERMETIC’s core markets with several thousand pumps installed in all canned motor pump applications.
Source & Pictures: HERMETIC-Pumpen GmbH
HERMETIC expended its range of applications for the "V-Line" and offers new accessories and features
HERMETIC-Pumpen GmbH, the world leading manufacturer of leak-free and maintenance-free canned motor pumps, has further expanded its modular product line "V-Line" for the chemical and petrochemical industrie. In addition to new accessories and even more individualised documentation, the V-Line's performance range now also includes the use of aggressive media and lower fluid temperatures up to -50°C. The distinctive feature of the V-Line: Thanks to standardised assemblies, system builders, planners and process operators can configure the most suitable canned motor pump online with just a few clicks within a wide range of common applications. Video tutorials explain the individual pump configuration step by step. Delivery is within 8-12 weeks.
New features, new applications
The introduction of new material combinations for plain bearings broadened the range of applications as it is now possible to use fluids with a temperature of -50 °Celsius instead of -40 °Celsius. In conjunction with modified bearing clearance, the V-Line is also suitable for pumping any type of potentially explosive refrigeration media. So far, the units were available in stainless steel or cast steel design. From now on, cast steel housings can also be combined with stainless steel impellers as is common in refineries, for example. This allows the use of V-Line pumps even with aggressive media. A further option is the choice of a cast or stainless-steel flushing connection as required by the factory standards of leading chemical companies. V-Line pumps are now also available without base plate.
Customized documentation, frequent status reports, factory acceptance
It is now also possible to individualise the documentation. In addition to an individual nameplate that can include company-specific identifiers, design drawings and parts lists can be prepared in customer-specific layouts. This eases seamless integration into operational processes without time-consuming document conversion.
Due to the fast delivery time, the V-Line pump concept is geared to the market dynamics in plant construction. Thanks to modular assemblies, digitised pump design as well as lean manufacturing and logistics processes, customers will receive a canned motor pump within 12 weeks. Frequent project status reports - weekly on request - assure customers that their pump is ready by the delivery date. From now on, customers can receive the factory acceptance certificate of their V-Line pumps at the HERMETIC headquarters in Gundelfingen where the company maintains one of the most modern test facilities in Europe.
Even more options for online configuration
As part of the product line expansion, the V-Line online configurator, the HERMETIC Expert Tool, has undergone an extensive update. All new features have been integrated into the configuration tool to improve the user experience even further. Among other things, the comprehensive liquid database allows the selection of a chemical liquid directly by mouse click or alternatively by using a free text search.
Six easy-to-understand video tutorials lead step-by-step through the pump selection process and provide information on individual topics, such as pump design in general or the user interface. For specific questions about the Expert Tool, the user is taken directly to the contact details of the responsible field representative or technical contact person on the support page to receive personal assistance.
View to the new expert-tool from HERMETIC
Performance spectrum of the HERMETIC V-Line
The HERMETIC V-Line is designed for fast, need-oriented and price-optimised delivery of canned motor pumps for common, predefined applications in the chemical and petrochemical industries. There is a choice of single and multi-stage variants with different hydraulics, motor ratings and material versions including matching monitoring technology. The product range is suitable for application with pumping heads from 12 to 295 m, volumetric flow rates from 1.0 bis 130 m³/h, fluid temperatures from -50 °C to +120 °C, power ratings from 8 to 48 kW and pressure ratings from 16 to 40 bar. Within these parameters, around 300 pump-motor combinations and, with the inclusion of accessories and options, more than 1000 pump variants can be configured with just a few clicks using the online tool. Without exception, all pumps meet the high HERMETIC quality standards including the unique ZART® (Zero Axial and Radial Thrust) principle. We guarantee delivery within 12 weeks.
Single-stage canned motor pump type NFC
Source & Pictures: HERMETIC-Pumpen GmbH
Pump specialist from Gundelfingen honored for its broad vertical range of manufacture in Germany
In cooperation with the Hamburg Institute of International Economics (HWWI) and the IMWF Institute for Management and Economic Research, the editorial team of stern magazine conducted a study to determine just what distinguishes companies that remain true to Germany as a location for development and production against the backdrop of a globalised economy. Over 300 enterprises participated in the study, with 173 of these being awarded the “Made in Germany – Trust in Germany” seal. HERMETIC-Pumpen GmbH was distinguished in the engineering/tooling category, winning an award for its real net output ratio level in Germany.
The “Made in Germany” label of origin is the unchallenged holder of first position on the so-called Made-In Country Index, as indicated in a survey of around 43,000 people conducted in 52 countries in 2017 by Statista, the leading statistics portal. As “Made in Germany” is a label voluntarily applied by manufacturers themselves, stern, the renowned German weekly, decided to investigate the true value of these terms today in a globalised economy that offers companies cheaper labour almost everywhere else other than in Germany.
In a scientific study, stern examined the real level of value still generated here in Germany by German enterprises. Strict criteria were set for this purpose, including the requirement that key production steps responsible for typical product characteristics and final assembly be realised exclusively in Germany. The vertical range of manufacturing in Germany needs to exceed 50%, while quality assurance and the development of products must be primarily realised in Germany. The results were published in June 2019. Of over 300 companies participating in the survey, 173 were awarded the stern “Made in Germany – Trust in Germany” quality seal. The fact that many of the award-winning companies are medium-sized family-run enterprises was noteworthy in this respect. Their average real net output ratio in Germany is 87%. HERMETIC, the pump specialist from Gundelfingen near Freiburg im Breisgau, received the award in the engineering/tooling category.
A passion for pumping technology that extends back more than 150 years has elevated the family-run enterprise to a position of global leadership. High-tech pumps from Gundelfingen are to be found wherever maximum safety levels for people and the environment need to be ensured during pumping of hazardous gases and liquids. Included in the prestigious Index of the University of St. Gallen for the first time in early 2019, everybody at HERMETIC is also extremely proud to receive the second distinguished award this year.
Sebastian Dahlke, manager and CCO at HERMETIC, says: “Our customers, whether in the chemical or oil and gas industry or industrial refrigeration, have always placed their faith in the high level of precision, durability and reliability of HERMETIC pumps. Our complex understanding of and commitment to quality maintains and strengthens our competitiveness. This is why we bundle all pump technology competencies here under a single roof. We’re proud of our excellent specialists, and we believe in investing in their further training and education. Maintaining our know-how and high real net output ratio at our headquarters in Gundelfingen creates the bedrock for the satisfaction enjoyed by our customers. This ensures our growth and the future of our enterprise. We’re delighted to receive this award, an honour we do not simply regard as a seal of approval for our products. We also consider it a mark of appreciation for our social responsibility at a regional level and loyalty to this location”.
Continuous investment in the main plant underscores the clear commitment of HERMETIC stakeholder families to Germany as a production location. A newly constructed production facility and expanded logistical capacities were commissioned in Gundelfingen as recently as 2017. HERMETIC employs roughly 440 people at its headquarters in Gundelfingen near Freiburg im Breisgau. The company also has subsidiaries in China and the United States and a network of service and business partners that spans the globe.
HERMETIC-Pumpen GmbH, the world leader in the development and manufacture of hermetically sealed centrifugal pumps, donated a hermetically sealed refrigerant pump to the Norwegian University of Science and Technology (NTNU) in Trondheim. The canned motor pump designed specifically for CO2 applications is being used in a pilot plant that is researching thermal energy storage using phase change materials in industrial CO2 refrigeration systems. The aim is to reduce peak loads to enable system downsizing. The resulting benefits are a significant reduction in capital investment costs and ongoing energy costs of the overall system.
From left to right: Håkon Selvnes, NTNU / Torsten Brodersen, FINISTERRA / Armin Hafner, NTNU during the handover of the refrigerant pump at the Institute of NTNU in Norway. (Picture: HERMETIC)
As part of environmental and climate protection, industrial refrigeration technology is increasingly demanding solutions that reduce direct emissions of refrigerants as well as overall energy consumption. As a result, the significance of CO2 (R744) as a refrigerant has also increased rapidly in plant engineering. The reason: CO2 is a natural refrigerant and environmentally friendly and cost-effective compared to the fluorinated refrigerants. CO2 is colourless, non-toxic and non-flammable.
Research project: Phase change material in industrial CO2 refrigeration systems
To reduce the energy consumption of industrial CO2 refrigeration systems, the Energy and Process Engineering Department of NTNU in Trondheim is testing a new thermal energy storage system. The research project investigates the extent to which thermal energy can be stored at low load times in phase change materials (PCM) - also known as phase change storage or latent storage – for reuse during peak loads. Added heat accumulators should reduce the load peaks. This allows the system to be designed for a lower load level contributing to system downsizing. In this way, it is possible to significantly reduce both the acquisition costs and the ongoing energy costs of the overall system. Particularly huge potential for this technology exists in plants that have major differences in the cooling demand during the day, such as in cooling processes in the food industry. Benefits on the plant side include smaller pipe dimensions, low energy consumption for pump circulation, small pressure drop and efficient heat transfer.
High demands on the components used
A distinctive feature of CO2 is its critical point of 31 °C that requires much higher pressures for heat dissipation than are normally used in industrial cooling. This places special demands on the components used. In the pilot plant, the refrigerant CO2 circulates in a temperature range from 5 °C to -50 °C with a maximum nominal pressure of 52 bar. For pump technology, it is particularly important to control the high pressure of the pumped medium. Even at normal operating temperatures, CO2 also has a low viscosity that continues to drop as the temperature rises. This has a negative effect on the carrying capacity of the plain bearings. Other points are the required absolute tightness and a low MTBF value both demanding the highest reliability of the pump used.
HERMETIC refrigerant pump specifically designed for CO2 applications
For the pilot plant, HERMETIC-Pumpen GmbH together with its Norwegian agent Finesterra AS supplies a multi-stage canned motor pump of the type CAMh specifically designed for CO2 applications. This series has been developed to meet the requirements of operation at 52 bar and standstill pressure. The generously dimensioned plain bearings made of state-of-the-art sintered materials ensure contact-free and thus virtually wear-free operation of the pump. The construction and material choice of the pump series cover the nominal pressure PN 52 reliably. A pressure test at 78 bar is carried out on each pump according to valid standards such as ISO 15783 for canned motor pumps. In addition, the secondary safety containment is tested for leak-tightness using nitrogen (N2). In this way, the HERMETIC pump ensures a reliable and controlled flow of the refrigerant in the pilot plant.
HERMETIC-Pumpen GmbH is committed to research and development
Adrian Schäfer, Product Manager for Refrigerant Pumps says: "HERMETIC pumps have advanced technologies that made us a world market leader. This is not possible without continuous investment in research, development and manufacturing. It is therefore our aim to support research at universities as well. We are interested particularly in research fields that focus on environmental protection and energy efficiency. We wish the research team every success."
About NTNU – Norwegian University of Science and Technology
NTNU is the largest university in Norway, with an international focus, headquarters in Trondheim and campuses in Ålesund and Gjøvik. NTNU has its main profile in science and technology and, with a total of nine faculties, offers a variety of study programmes and a broad academic spectrum for around 42,000 students. Two researchers working at NTNU have received Nobel Prizes: May-Britt Moser and Edvard Moser (2014). In addition, the laureates Ivar Giæver (1973) and Lars Onsager (1968) were trained at the Norwegian Institute of Technology (NTH), one of NTNU's predecessors.
Background information on the CAMh series:
Operating temperatures: -50 °C to + 10 °C
Flow rate: 1 m³/h to 14 m³/h
Pump head: up to 85 m
Nominal pressure: 52 bar
Test pressure: 78 bar
Motor power: 3 kW to 7.4 kW
Plain bearing material: 1.4571/W5 – 1.4571/SiC30
More information on the CAMh series: https://www.hermetic-pumpen.com/de/camh
Canned motor pump in high pressure design. (Picture: HERMETIC)
HERMETIC-Pumpen GmbH supplied a canned motor pump with a flow rate of 1,000 m³/h and a delivery head of 65 m for a new diesel fuel desulphurisation plant of a Chinese refinery. The high system pressures and temperatures prevailing during the desulphurisation process require the highest safety and reliability of the equipment used. The hermetically sealed HERMETIC pump, extensive measuring and control equipment as well as rigorous tests and inspections not only guarantee the plant operator a safe pump solution with high availability. The decisive factor to the refinery was HERMETIC's expertise and experience with the complex challenges of large industrial oil and gas plants. In addition, the pump specialist with a joint venture provides on-site support to manufacturing plants and service offices in China.
Under the increasingly stringent global regulations on the reduction of pollutant emissions, China also has a limit of 10 ppm for the sulphur content in diesel fuels. To comply with the requirements, refineries are required to invest in technological modernisation. The diesel desulphurisation process includes a hydrogenation process that requires system pressures of more than 100 bar and temperatures of more than 400°C. Since even the smallest leaks can cause fatal fires, plants and components require the highest level of reliability and safety. In the case of the reactor circulation pump requiring a delivery rate of 1,000 m³/h and a delivery head of 65 m, a well-known refiner in China relies on the expertise and quality of HERMETIC.
Leakage-free pump solution for the oil and gas industry
The core of the 10-ton pump system is a CNKfH+D 300-500 canned motor pump. The water-cooled motor of the pump according to API 685 has a shaft power of 185 kW. All pressure containing parts were made of forged solid materials. The housing is made of highly resistant SS 316 Ti stainless steel and has been tested at 310 bar. With a system pressure of 112 bar and an operating temperature of 405 degrees Celsius, the integrated, compact unit is designed for a nominal pressure of 130 bar. In addition to the rotor lining, the motor housing serves as a secondary containment, which provides a leak-free, safe pump solution.
Low-wear and low-maintenance design principle
The design-related omission of wear-prone components such as shaft seals, couplings and bearings reduces the maintenance and repair costs and ensures a longer service life. The "ZART" (Zero Axial and Radial Thrust) technological part from HERMETIC ensures a contact- and wear-free running of the rotor unit. It is based on comprehensive axial thrust balancing in conjunction with hydrodynamic sleeve bearings. While relief mechanisms in the control unit continuously monitor the axial position of the pump shaft, a fine fluid film between the rotating and static sleeve bearing component allows a full "floating" of the rotor. For the monitoring of the the axial thrust balancing, the pump is equipped with the HERMETIC "MAP" technology. The rotor position monitoring detects the slightest plays in the rotor movement and serves as a kind of early warning system to prevent undesired operating conditions and expensive damage. Due to this hydraulic power balance, the HERMETIC pump operates without radial and axial wear, thus offering plant operators significantly longer service life.
Entire system with integrated measuring and control equipment
To ensure high availability and durability, the canned motor pump was provided with additional measuring and control equipment. To prevent potential motor and bearing damage, this particular process avoids gas accumulations on the motor side, which can escape from the pumped medium. A dosing pump precisely tailored to the application generates a fine, uniform counterflow in the rotor space, which prevents this. A level indicator integrated in the system monitoring indicates whether there is no gas in the circuit. While a heat barrier prevents the heat transfer from the pump to the motor part, an external heat exchanger ensures the dissipation of motor heat loss. To prevent overheating, a temperature monitoring of the motor winding is integrated. Another sensor monitors the temperature of the motor cooling circuit, which ensures the cooling performance and the functional safety. Other components such as safety valves and an extensive, rigorous testing and inspection procedures including X-ray tests, vibration tests and ultrasonic tests as well as comprehensive documentation complete the scope of supply to a highly reliable system. HERMETIC pumps demonstrate their safety and performance in currently 15 large refineries worldwide.
HERMETIC - in CO2 business since over 50 years!
As part of environmental and climate protection, industrial refrigeration technology is increasingly demanding solutions that reduce direct emissions of refrigerants as well as overall energy consumption. As a result, the significance of CO2 (R744) as a refrigerant has also increased rapidly in plant engineering. The reason: CO2 is a natural refrigerant and environmentally friendly and cost-effective compared to the fluorinated refrigerants. CO2 is colourless, non-toxic and non-flammable.
In this brochure you will find bundled expert knowledge. Written by experts for experts and users.
HERMETIC canned motor pumps reaffirmed according to the 'Russian Maritime Register'
With the renewed certification of its refrigerant pumps according to the "Russian Maritime Register of Shipping" (RMRS), HERMETIC-Pumpen GmbH is further expanding its market position in the field of maritime applications on the Russian market. The German pump specialist received the renewed approval for the Russian shipbuilding market at the end of 2018. Single and multi-stage canned motor pumps of the CNF and CAM series have been certified.
HERMETIC supplies the majority of its canned motor pumps manufactured at its headquarters in Germany to the refrigeration industry. For natural refrigerants such as ammonia (NH3) and carbon dioxide (CO2) and water-glycol mixtures that are increasingly being conveyed with such pumps. The key advantage of canned motor pumps from HERMETIC are their exceptionally high values of Mean Time Between Failures (MTBF).
Reliable, maintenance-free technology for maritime applications
As in refrigeration systems of food technology and deep freezing, refrigerant pumps on ships must be exceptionally reliable. Typical applications include floating cold stores on fish trawlers where a failure of the pumps cannot be tolerated. The lack of using any dynamic seals, such as mechanical seals, and contact-free operation on hydrodynamic plain bearings allow maintenance-free operation and increase the average service life of HERMETIC pumps enormously. For example, the latest generation of refrigerant pumps, the HERMETIC LC pump, designed specifically for liquid cooling, achieves typical MTBF values of 105 hours. HERMETIC pumps are used in marine technology for superheated water, i.e. water with temperatures above 100 °C and for cooling offshore wind turbines.
HERMETIC – traditionally strong in the Russian market
Traditionally, HERMETIC has a strong presence in the Russian market in all applications needing canned motors. In addition to RMRS certification, certificates of the Russian TR directive for machines and for explosion protection are also available.
From a small, single-owner operation to world market leader: As specialists for canned motor pumps, we have earned a worldwide reputation for safe and long-lasting pumps which can be used for the most extreme applications and hazardous conveying media. The Gundelfingen-based family-owned company has now been admitted to the coveted World Market Leader Index of the University of St. Gallen, as reported by the magazine WirtschaftsWoche at the end of January. Among the selected businesses were 450 companies that succeeded in becoming number one in their specific sector. HERMETIC is listed as the 2018 Global Market Leader Champion in the ‟hermetically sealed centrifugal pumps (canned motor pumps)” sector.
There are up to 1,500 companies combined in Germany, Austria and Switzerland considered to be world market leaders, depending on the index used. This includes companies that are not well-known which is why they are also referred to as ‟hidden champions”. But who is really a world market leader? This question is answered every year with the ranking carried out by the HBM school of entrepreneurs of the University of St. Gallen and the Academy of German World Market Leaders (ADWM). A research team determines the current world market leader based on an extensive scientific assessment process. Merely 450 companies from the DACH region (German-speaking countries) were admitted in 2018 as candidates to one of the most rigorous rankings. HERMETIC-Pumpen GmbH based in Gundelfingen, Germany, is now also a listed ‟Global Market Leader Champion” in the "canned motor pumps" sector.
‟We are so excited about this commendation and it serves as an incentive for us to continue to further advance our position as a company where both tradition and innovation play an important role. The fact that we are now listed as World Market Leader of hermetically sealed centrifugal pumps helps reinforce our focus of combining quality, precision, and reliability as our core competency in conjunction with a structured strategy for growth,” according to Sebastian Dahlke, CCO.
Well over 150 years of passion for pump technology have elevated HERMETIC-Pumpen GmbH to become world market leader in its sector. Everything revolves around the pumping of valuable, critical and hazardous fluids using ‟canned motor pumps” at the company's head office in Gundelfingen. This type of pump technology is based on integrating motors and pumps in a way that ensures that no fluid can leak, and so far it has been used to produce pumps with a weight of up to 20 tonnes and a height exceeding six metres. Areas of application include the chemical industry, oil and gas industries and industrial refrigeration technology. Currently, over 280,000 HERMETIC pumps have been installed worldwide for the most demanding pumping applications.
Milestones during the development from a small, one-owner operation to an international pioneer of pump technologies include patented, unique technologies, the establishment of branch offices in China and the US, the development of the largest canned motor pump worldwide, plus numerous international awards. These milestones also serve as the driving force behind further advancements in the field. Ongoing investments by HERMETIC aim to accommodate the ever larger systems of the customers and the ever growing demand for this type of pump technology. A new production hall has been commissioned most recently at the Gundelfingen location in 2018. This is where an additional production area of 3,500 square metres is available that accommodates one of the most sophisticated high-tech test bays in the pump sector as well as a new dispatch and logistics centre.
‟We continue to set new benchmarks with our pumps that have been featuring all the while high precision, durability and reliability. Our unwavering commitment to meet our high quality standards forms the basis for our customers' satisfaction and the future of our company. This is why we are investing in the education and capabilities of our employees by offering in-house training,” explains Sebastian Dahlke.
About the World Market Leader Index
There is a set of stringent, objective and transparent criteria to be met by candidates to be listed as a World Market Leader as best in one's sector. These include among other factors that the company has to be represented with branch offices in at least three continents, generate annual revenues of 50 million euros minimum whereby exports should account for at least 50 percent of the sales, and rank first or second in the relevant market sector. A further essential criterion for being selected as ‟Word Market Leader Champion” requires the company to be owner-managed with the head office being located in a German-speaking country (DACH region). The ranking results are published every year by the magazine WirtschaftsWoche. For more information go to: www.weltmarktfuehrerindex.de
Thanks to the restructuring of its pump portfolio into three clearly divided areas, HERMETIC-Pumpen GmbH, a leading developer and manufacturer of hermetically sealed pumps, has geared its product range even more consistently to the market dynamics in plant construction. The specialist for canned motor pumps has combined a defined selection of common single-stage and multi-stage chemical pumps in the product are “V-Line” and optimised their production and logistics. The result: V-Line offers modular configurable pump variants with optimised delivery times of 8 to 12 weeks for a wide range of applications. Without exception, all pumps meet the high HERMETIC quality standards including the unique ZART® (Zero Axial and Radial Thrust) principle. An innovative online expert tool allows configuration with just a few clicks.
HERMETIC V-Line: Modular configurable canned motor pumps
The HERMETIC V-Line (Variant-Line) is designed for fast, need- and price-optimised delivery of canned motor pumps for common, predefined applications in the chemical and petrochemical industries. There is a choice of single and multi-stage variants with different hydraulics, motor ratings and material versions including matching monitoring technology. The product range is suitable for application with pumping heads from 12 to 295 m, volumetric flow rates from 1.0 bis 130 m³/h, fluid temperatures from -40 °C to +120 °C, power ratings from 8 to 48 kW and pressure ratings from 16 to 40 bar. Within these parameters, many pump-motor combinations can be configured with just a few clicks using an online tool.
HERMETIC multistage canned motor pump type CAM
Sophisticated pump technology attractively priced and with quick delivery
The V-Line pump concept follows the modular approach of plant engineering and consists of standardised assemblies. The introduction of the V-Line enabled the specialist for canned motor pumps to optimise production and logistics. This makes HERMETIC's sophisticated pump technology that has so far been used primarily in customised high-end solutions extremely attractive for many other fields of application. With the V-Line, plant constructors, planners and process operators not only receive a canned motor pump at an attractive price. With a delivery time of 8 to 12 weeks from order, customers also benefit from extremely short delivery times. The modular pump design also results in high spare parts availability.
Like all canned motor pumps from HERMETIC, the V-Line offers the same advanced HERMETIC technologies including the unique ZART® (Zero Axial and Radial Thrust) principle. Without exception, all V-Line pumps meet the high HERMETIC quality standards.
HERMETIC single-stage canned motor pump type CNF
Easy online configuration and optimization of design parameters
Planners and operators can configure or select their pumps themselves using the HERMETIC expert tool. The expert tool, innovative software developed by HERMETIC, is accessible as a browser-based online tool in a protected area. To determine whether a V-Line pump is suitable, users only need to enter the most important project parameters such as operating point and pumping medium or the desired accessories. With just a few clicks and within seconds, the expert tool shows which pump is the right one. Based on the operating point and pumping media data, the expert tool also enables a real-time simulation of the pump design and thus the optimisation of the design parameters. The expert tool is easy to use and offers a clear comparison of pumps based on criteria such as efficiency or motor rating. Configurations can be stored in your personal account and retrieved at any time.
Further information on the HERMETIC V-Line is available online at or from your HERMETIC sales contact. Access to the expert tool is available at vline.hermetic-tools.de. If you have any questions about the expert tool, please contact Dominik Hegen at email@example.com
Views to the new HERMETIC expert-tool
Background: Canned motor technology from HERMETIC
In contrast to magnetic drive or centrifugal pumps with mechanical seals, canned motor pumps are hermetically sealed. Instead, canned motor pumps have a second hermetic safety containment that is tested to 40 bar to prevent leakage of liquids, including toxic or explosive ones. The design-based omission of wear-prone components such as shaft seals, couplings and roller bearings ensures a high degree of operational safety, low wear and the best MTBF (Mean Time Between Failure) values compared to other pump technologies. In addition, the compact units save 50 percent of installation space and run quietly due to the elimination of external cooling components and rotating parts.
Canned motor pumps from HERMETIC use sophisticated technologies. These include, for example, the unique ZART® (Zero Axial and Radial Thrust) principle developed by HERMETIC. The complete compensation of axial forces guarantees an extremely high reliability of HERMETIC pumps in the production processes of operators. HERMETIC pumps stand for highest quality and performance characteristics. They are tested rigorously on one of the most modern test benches in Europe.
Canned motor pumps guarantee maximum safety for man and the environment in the various production processes of several industries. Often designed for extreme conditions, they are used whenever liquids and gases have to be pumped at extreme temperatures and under potentially hazardous conditions. The pumps offer complete reliability – even at the highest pressures and performance levels. They are used whenever conventional technologies reach their limits. High system pressures, large temperature fluctuations, media that is extremely difficult to convey – especially build for such extreme conditions.
HERMETIC canned motor pump type CNKp 125-100-250B
The second hermetically-sealed containment shell of the canned motor pumps offers completely reliable protection against undesired leakage from the pumps. Also, the canned motor design (which has been well-established for decades) completely avoids the need for shaft seals, conventional bearings and couplings. The result is a high level of operational reliability, hardly any wear and, consequently, a high MTBR (“Mean Time Between Repairs”) value.
HERMETIC canned motor pump type CNKfH+D 150-360 customized design
Preferred applications of hermetic pumps
Canned motor pumps are preferred in the chemical and petrochemical industry, but also for simple pumping tasks, such as circulating pumps in industrial refrigeration equipment. In general, the following media are conveyed: aggressive, toxic, explosive, hot, cryogenic, malodorous, volatile, flammable or carcinogenic substances – in brief, media that represent an environmental and health hazard.
Designs and Standards
• Single and multi-stage canned motor pumps according to DIN EN ISO 15783
• API 685 2nd Edition “Medium Duty”
• DIN EN ISO 2858
On time for the ACHEMA, HERMETIC announces a major order to be ready for dispatch: More than 200 pumps with canned motor drive are packed and ready to be sent to the Middle East. The mega scale project includes all pump widths: from the smallest ‘CAM 1’ to typical Oil & Gas pumps of the ‘CNP’ range. All of them are fitted with API 610 (American Petroleum Industry standard) hydraulics and equipped with a maintenance free canned motor and HERMETIC ZART ® technology. The pumps fulfill API 685 standard requirements for sealless pumps, as well as expectations towards safety and reliability. The drive power ranges from 1 kW to more than 100 kW. Several typical applications of refineries and power generation plants are covered: Amines, sour water and several highly volatile hydrocarbons.