Piston pumps are used for some large level vacuum applications. These pumps possess a sliding sleeve through which the gas enters, after that drawn right into a cylindrical chamber and exhausted by a rocking piston plunger. These pumps are very hardy and also have pumping speeds that range from 15 
cfm to 2,000 cfm and the pumps can reach a pressure of 1 1 x 10-4 Torr. Rotary piston pumps can be prepared for corrosive and oxygen Rotary Piston Vacuum Pump china assistance.
