Diaphragm compressor

Diaphragm compressors form another group with backup and piston rings and rod seal. Their diaphragm is actuated mechanically or hydraulically by a rod and a crankshaft mechanism. Only the membrane and the compressor box come in touch with pumped gas. For this reason the mechanical diaphragm compressors construction can be used with a small flow and low pressure or as vacuum pumps for pumping toxic and explosive gases. The membrane has to be reliable enough to take the strain of pumped gas. It must also have adequate chemical properties and sufficient temperature resistance.

A diaphragm compressor is also called as a membrane compressor.