50 pieces of single small orifice air valves with brass isolation valves & oblong holes to suit DN40/50/60/65 flanges and 240 pieces of double orifice air valves with round outlet are ready for delivery.
50 pieces of single small orifice air valves with brass isolation valves & oblong holes to suit DN40/50/60/65 flanges and 240 pieces of double orifice air valves with round outlet are ready for delivery.