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chinese factory wholesaler pn16 Cast Iron Wafer type butterfly valve Electric Pneumatic Handle
DN300 Pn16 Pneumatic Butterfly Valve Stainless Steel Ductile Iron Wafer Butterfly Valve
D71X DN100 5K 10K resilient seal cast iron wafer type butterfly valve
API594 Stainless Steel CF8 Dual Plate Wafer Check Valve
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4 Inch Cast Iron Steel Pneumatic Wafer Type Butterfly Vlave High Pressure High Temperature
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Wafer Type Flanged SS ASME B16.34 Metal Seated Ball Valves