Device for oiling and de-oiling compressed air

摘要

A device for oiling the fresh air and de-oiling the back flowing discharge air of a compressed air operable cylinder piston system having a reciprocatory piston comprising a housing which has a compressed air inlet and outlet and which has provided therein a control valve for the quantity of oil to be added to the compressed air to be passed through the compressed air outlet to the compressed air operable cylinder piston system. The compressed air outlet is through a tangential bore connected to an annular twist passage located above an annular chamber surrounding an inner chamber which has arranged therein a filter insert and communicates with the inlet through a bore. A check valve in the bore fully opens on fresh air passing from the air inlet to the outlet and is partially closable by the back flowing discharge air from the system.