Vall Ball * Valve ball for duplex ball valve, stainless ball valve, etc. * Over 20 years experience in precision casting Valve Ball1.Material: Stainless steel, duplex steel, nickel base alloys, etc.2. ... oxidation.3.Process: Investment casting, hot forging.4.Valve accessories, like stems, valve caps, bolts of living, shafts; Pumps, pipes, ... of the above alloys are available. Inconel825 cast ball valve