... 3.type:single,double,thread,butterfly,brass ball 4.material: ppr, pvc,abs,pp We are expert in producing plastic ... than 15 years experience about making double ball valve moulds.union ball valve has seven parts.We can make ... valve, water tapes, etc., made of ABS, U-PVC, C-PVC, PP-R, PE, PE-RT, POM and other ... sewerage pipe fitting moulds, etc. made of ABS, U-PVC, C-PVC, PP-R, PE, PE-RT, POM and other ...