Pumps Allow Circulation Of Adhesive Coating Fluids

Watson-Marlow has provided 521 Series pumps to enable Prelok to circulate adhesive coating fluids at its Willenhall plant in the West Midlands. Used in combination with Gore Style 400 high-resilience tubing, the solution overcame problems caused by previous pumps of damaging the fluid, or of the fluid damaging the pump. In peristaltic pumping operations, nothing but the hose or tube touches the fluid, eliminating the risk of the pump contaminating the fluid, or the fluid contaminating the pump.

Fluid is drawn into the pump, trapped between two rollers and expelled. The complete closure of the tube gives the pump its positive displacement action, preventing backflow and eliminating the need for check valves when the pump is not running. Prelok now has a total of four 521 Series pumps at Willenhall, with a further four used in its European operations.

The resilience of Gore Style 400 is due to Viton GF-600S, a peroxide-cured fluoroelastomer based on Dupont advanced polymer architecture. Performance testing shows that Style 400 tubing offers greater than 50 times longer life than conventional non-reinforced extruded tube. Due to its expanded PTFE reinforcement, the tubing also offers burst resistance to protect against the swelling effect produced when pumping aggressive chemicals using standard extruded tube.

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