Profile: China Vacuum Pumps & Air Compressors is a manufacturer of vacuum pumps of spiral slice type, Rotary Piston vacuum pumps, Roots Vacuum pumps, Gas-Cooling Roots Vacuum pumps, Rotary Vane Vacuum Pumps, Water ring Vacuum Pumps, Reciprocating vacuum pumps and Vacuum valves. We are an ISO 9001 certified company. Our products are widely used in departments of metallurgical, building materials, petroleum, environmental, protein, chemical, medicine, textiles, food, aerospace, electronic, and power industries. Our rotary piston pump is a kind of hydraulic pump. The doing work pistons lengthen in the radial route symmetrically all over the drive shaft.