Discharge filters are highly effective filter systems which have been specially developed for removing oil mist from exhaust air from oil recirculating rotary vane vacuum pumps. The highest possible removal of oil for a minimal dynamic pressure as well as a long working life reduce the maintenance of vacuum pumps and increase operational reliability. We sell this filter element for Busch Pumps R5 0021B and R5 0021C vacuum pumps with Busch Part Number 0532 140 155.