Pneumatic Butterfly Valve (Wafer) Nominal Diameter: DN40-600 Pressure Range: 0-16bar Medium Temperature: -20C~+80C Valve Body Material: Gray cast iron, ductile cast iron, cast steel, stainless steel Sealing Material: NBR, EPDM, FPM Valve Disc Material: Ductile cast iron, cast steel, stainless steel, nickel alloy Feature: Double bubble and zero leakage, double (single) stem without pin Applicable Medium: Drinking water, sewage, high-purity water, sea water, air, etc Operating Pressure: 3-8bar PC to carton box, carton box to plywood case