Piston type vacuum pumps and compressors are being used where oil-free air is a must. The oil free character of the pump is certainly a guaranty of zero-maintenance costs. The pumps are available in capacities of optimum 6 m3/hr plus they are able to reach a vacuum of 10 mbar(a). Used 
since a compressor they reach a pressure of approx. 7 bar(g) optimum.
These pumps are getting used for light commercial works, medical industry, printing and instrument industry, plastic, meals and packaging, electronic, Piston Vacuum Pump china chemical and textile industry.