Edwards Vacuum Element - Adsorber - A223-04-077 This is a replacement activated carbon adsorber element carrying Edwards Vacuum part number A223-04-077. Edwards is a vacuum pump manufacturer, and adsorber cartridges in this range are fitted to the filtration housings used on vacuum pump systems, where the carbon holds oil vapor and odor rather than straining out solids. Carbon and mechanical filtration are complementary, not interchangeable. A carbon bed adsorbs vapor and is spoiled by liquid, so it is installed behind a mechanical stage. If you are working out which cartridge sits where in your housing, our coalescing filters and elements and general air filters pages show how the stages are normally arranged. Carbon is replaced on a time interval, because capacity is lost without any rise in differential pressure. The A223-04 series runs several close part numbers that differ in size, so order to the number printed on the cartridge you are removing rather than to the pump model. Note: This is an equivalent part and not an original equipment manufacturer (OEM) part number. Some manufacturers require OEM parts to maintain your warranty. | Air Supply Number: 05-04077