AP 04 Plastic Diaphragm Pump

The AP 04 Plastic Diaphragm Pump, a plastic-bodied air-operated diaphragm pump, is available with a 3/8" threaded connection; its capacity ranges from 0 to 25 liters per minute.

The double diaphragm, driven by compressed air, provides a leak-free transfer without the need for a packing gland; the pump is self-priming and is not damaged by dry running or closed valve (deadhead) conditions.

The housing is made of polypropylene; for the diaphragm and internal parts in contact with the fluid, materials such as Neoprene, Buna-N, Teflon, Viton, Santoprene, and EPDM can be used.

Material selection is based on the fluid being handled: the polypropylene housing is suitable for transferring acids and alkalis; the Teflon diaphragm option allows for use with aggressive solvents.

It offers a discharge head of 0–84 mss and a suction lift of 6–8 m; it can handle fluids containing solid particles up to 1 mm in size.

Compressed air in the 0–8.4 bar range is sufficient for actuation.

The plastic body ensures a long service life in corrosive environments; the series is designed for chemical transfer lines.