Ampco Pumps GmbH

Hygienic Pumps

Hygienic pumps (or sanitary pumps) are specialized fluid-handling devices engineered to move liquids cleanly without contaminating the product or allowing bacterial growth inside the pump housing. Unlike standard industrial pumps, hygienic pumps are designed to meet strict regulatory cleanliness standards, including 3-A Sanitary Standards and EHEDG (European Hygienic Engineering & Design Group).

The term hygienic pump is a broad term and applies to many different types of pumps. For instance, centrifugal pumps and rotary lobe pumps can both be hygienic pumps because of their material make-up but they are very different in how they work and the types of duties they perform. It is important to select a pump by performance.

Circumferential Piston Pump – ZP Series

Pump Type:  Positive Displacement

Hygienic Design & Benefits:

• Alloy 88 Non-Galling Rotors: Arc-shaped rotors sweep
  through double-webbed fluid chambers, creating long
  sealing paths and tight clearances without risk of
  metal-on-metal galling.
• Gentle Handling: Moves high-viscosity or delicate
  products without shearing, crushing suspended solids, or
  degrading cell structures.
• Full CIP Capability (ZP3): Patented front-loading seals
  and redesigned rotor case eliminate internal dead zones,
  enabling Clean-in-Place (CIP) without manual teardowns.
• 304 SS Gearcase: Solid stainless steel gearcase
  eliminates painted/cast iron surfaces that chip or rust.

Technical Specifications:

• Flow Rate: 0.1 to 452 GPM (up to 648 GPM max)
• Discharge Pressure: Up to 500 PSI (34 Bar)
• Viscosity Range: 1 to 1,000,000 cP
• Temperature Range: -40°F to 300°F (-40°C to 150°C)
• Wetted Materials: 316L SS body/cover; Alloy 88 rotors; 17-4 PH SS shaft

Model Lineup:

• ZP1 Series: 14 models, 5 seal options
• ZP1+ Series: PATENTED front-loading seal design,
  10 models, 2 seal options,
• ZP2 Series: 19 models, 2 seal options
• ZP3 Series: PATENTED front-loading seal design,
  CIP-able, 19 models, 2 seal options,

Rotary Lobe Pump – AL Series

Pump Type:  Positive Displacement

Hygienic Design & Benefits:

• Economical PD Alternative: Cost-effective,
  high-performance positive displacement solution for
  standard fluid transfer.
• Rotor Configurations: 5 types – Single Wing, Bi-Wing,
  Tri-Lobe, 2 Multi-Lobe versions.
• Front-Loading Seals & Easy CIP: Quick-access
  front-loading seals sit behind rotors, minimizing dead
  space and simplifying maintenance.

Technical Specifications:

• Max Flow Rate: Up to 440 GPM (100 m³/hr)
• Max Discharge Pressure: Up to 290 PSI (20 Bar)
• Viscosity Range: 1 to 1,000,000 cP
• Temperature Range: -40°F to 250°F (-40°C to 121°C)
• Surface Finish: 32Ra (0.8µm) standard

Model Lineup:

• 10 model sizes, 5 seal options

Sanitary Centrifugal Pump – EC+ Series

Pump Type:  Centrifugal

Hygienic Design & Benefits:

• Advanced Stub Shaft & Threaded Impeller Nut:
  Replaces traditional cross-pin impeller drives,
  eliminating internal dead legs and bacterial harbor
  points for drastically cleaner CIP.
• Vibration Reduction: Clamped stub shaft collar
  improves shaft alignment and stability, reducing
  vibration and extending seal life.
• Direct Drop-In Upgrade: Dimensionally and
  hydraulically interchangeable with standard C-Series
  pumps without re-piping.

Technical Specifications:

• Max Flow Rate: Up to 1,188 GPM (270 m³/hr)
• Max Outlet Pressure: 87 PSI (6 Bar)
• Max Viscosity: Up to 1,200 cP

Model Lineup:

• 10 model sizes, 2 seal options