Non metallic diaphragm pumps are air operated double diaphragm units constructed from polypropylene or PVDF with bolted bodies and stall free air valves. They range in sizes from 1/4" up to 2" and include compatible diaphragms, seats and balls in various materials. These pumps handle abrasive, viscous or corrosive fluids in chemical, industrial, water treatment and process environments, delivering leak resistant performance, self priming capability and durable operation.