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