It controls the inlet and outlet of the diaphragm, forms the drive mechanism after the power drive to drive the reciprocating movement of the piston, and drives the diaphragm back and forth through the hydraulic pressure to work to suck and discharge the liquid. This pump can rate of 0.4-1L/min, and suitable for long working time below 3Bar. Small size, strong structure, and long serving life. Chemical stability, could withstand dry rotation,and maintenance. Applications: widely used in instruments and equipment, medicine and chemical industry, home appliances and other fields., Manufacturer: CCZRD