Diaphragm compressors have a body, a diaphragm and a gasket and a connecting rod with an incorporated bearing, driven by an eccentric, balanced and splined to the motor shaft and a support of for fastening. The compressors are supplied duly fitted with A.C. single phase or D.C. motors. They are available either with single or double head to be used in parallel and in series. The compressors are oil free and don’t need any maintenance. Diaphragm compressors can be used both to create vacuum and to compress air.