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