... abs,pp We are expert in producing plastic valve and pipe fitting moulds.We have more ... years experience about making double ball valve moulds.union ball valve has seven parts.We can ... gate valves, locking valves, deflation valves, IBC valve, three way valve, water tapes, etc., made of ABS, U ... fitting of mainfold, bypass bend, compress coupling, expansion coupling, repair coupling, etc.5. We devote ...