A Single Orifice Air Valve Manufacturer in Canada is a type of air valve that has one air inlet and outlet and is used to release small amounts of air from a pipe while it’s operating. Description: 1. Available materials: CF8M, CF8, SS316, CF8M, WCB, WC6, WCC, LCB, LCC, SS304, SS316 2. Class:150-300 3. Pressure: PN6 to PN40 4. Size:1/2”-8” 5. End: flanged, threaded