... .PVC ,PPR,PE,PVDF pipe fitting injection machine 2.with CE PVC ,PPR,PE,PVDF pipe fitting injection machine with CE1. PVC ... gas. 2. Special design PVC screw for Injection molding machine to produce PVC pipe fitting, smaller ... as to decrease shear heat, screw design with double spiral groove divide into not plasticizing PVC ... enlarge screw torque. PVC ,PPR,PE,PVDF pipe fitting injection machine with CE