... have more than 15 years experience about making double ball valve moulds.union ball valve has seven parts.We can make all kinds of ... bottom valves, gate valves, locking valves, deflation valves, IBC valve, three way valve, water tapes, etc., made of ABS, U-PVC, C-PVC ... elbow, coupling, tee, reduce, cap, union, flange, flexible connector, water supply and sewerage pipe fitting moulds, etc. made of ABS ...