Design Considerations for Equipment and Piping Layout: The Diaphragm pumps are driven by compressed air. A primary consideration in pump layout is to place every pump close to the equipment that provides material to the suction inlet of the pump. Ideally, the suction piping is as short and straight as possible to minimize friction losses. Diaphragm Pump - piping-designer A diaphragm pump, also known as a membrane pump, is a positive displacement pump that uses a combination of the reciprocating action of a diaphragm and a series of check valves to pump a fluid. The action of a diaphragm pump is similar to that of a piston pump in which the piston is replaced by a pulsating flexible diaphragm.