Air Release Valves Details Types / Design : Single Orifice, Double Orifice, Float Type Sizes : DN50 – DN500 End Connections : Flanged Standards: DIN Materials:Ductile Iron Pressure Class: PN6 – PN40 Request for a quotation and fact sheet Infrastructure Gate Valves Butterfly Valves Check Valves Air Release Valves Fire Hydrant Penstock Accessories Fittings