20-40mm PVC Pipe Production/Extrusion Line 1. Cone-shaped dual screw extruder Extruder, 1 set ModelSJZ51/105 Srew Dia.:51/105MM, Screws No.:2 Screw,Barrel material38CrMoALA, nitrogen treatment Screw rotating speed1-35r/min Screw Rotate DirectionDifferent size outside rotating Effective Length1050mm Main Motor Power18.5KW; with frequency converter Heating power 9KW Heating plateCasting Aluminum ...