... type:single,double,thread,butterfly,brass ball 4.material: ppr, pvc,abs,pp We are expert in producing plastic valve and pipe fitting ... moulds.We have more than 15 years experience about making double ball valve moulds.union ball valve ... locking valves, deflation valves, IBC valve, three way valve, water tapes, etc., made of ABS, U-PVC, C-PVC, PP-R, PE, PE-RT ...