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