Special Material Valve:Titanium,Nickel Alloy,Zirconium,Nickel-Al Bronze,Super(Dulex), Nickel- ... , 310, etc. Design and Manufacturing special material valves:- Special material valve (w/strainer, w/glass) on the basis of bar material ... ) Duplex347, 321, 310, etc.Nickel-Al Bronze Dual Plate Check Valve Specification:Size: ½”-10”Pressure rate: up to 4500lbsEnd connection: wafer ...