Oil mist filter (type FO) Exhaust gases from oil-sealed rotary vane pumps always carry a certain quantity of oil mist. This is extremely unpleasant, and even harmful, for those working nearby. VACUUBRAND oil mist filters separate nearly 100% of oil mist at the ultimate vacuum of the pump. - Very high degree of separation. - Optimal control by transparent catchpot. - Easy draining of oil. - Direct mounting on the oil reservoir outlet. - Integrated pressure relief valve for burst protection in case of blocked filter. Oil mist filter (type FO) Exhaust gases from oil-sealed rotary vane pumps always carry a certain quantity of oil mist. This is extremely unpleasant, and even harmful, for those working nearby. VACUUBRAND oil mist filters separate nearly 100% of oil mist at the ultimate vacuum of the pump. - Very high degree of separation. - Optimal control by transparent catchpot. - Easy draining of oil. - Direct mounting on the oil reservoir outlet. - Integrated pressure relief valve for burst protection in case of blocked filter.