Secure transport of Solvents in the paint and coatings industy

Solution

Due to limited space on-site, the LEWA ecofoam system was intentionally mounted on a compact baseframe together with a mechanical part and a control cabinet. High-quality V4A stainless steel (1.4571) and, as diaphragm material, PTFE or V4A stainless steel (1.4401) are used for wetted components of the ecofoam. LEWA installed various auxiliary components such as a cooling jacket at each pump head, a suction-side plate heat exchanger (radiator) and an in-line cooler to ensure that the blowing agents are in a fluid state. To protect the system from cavitation, the starting fluid temperature of 20 °C can be lowered to approximately 5 °C at an associated CO2 steam pressure of 57 bar. The system can be used at extruder pressures up to 400 bar. A flow rate over a wide adjustment range of 0.1 l/h to 10 l/h can be achieved through the combination of speed control and manual stroke adjustment of the pump.