When Prelok encountered problems using both impeller and diaphragm pumps to circulate adhesive coating fluids at its Willenhall plant in the West Midlands, this specialist in the application of pre-applied locking and sealing processes for threaded components turned to 521 Series pumps from Watson-Marlow. 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. Mining-technology.com reports