For Pfeiffer Pumps up to 12 m3/h (7 CFM). The oil mist filter is fitted to the exhaust port of the rotary vane vacuum pump. It reduces air pollution by operating fluid mist expelled in greater or smaller quantities (depending on the working pressure) from the pump. The filter is not suitable where the pumping of corrosive gases and vapours or those gases which tend to polymerise or which can cause resinification of the oil mist filter is involved.