... is mainly used in the production of double PVC pipe water drainage pipe, electric conduit, etc., conical twin-screw extrusion equipment configuration ... equipment, can be used for rigid PVC pipe extrusion processing.2.Rigid PVC pipe equipment adopts SGC63-SGC630 and models:3 ... system adopted, Using vacuum exhaust system adopts the material of water, gas and volatile, can improve the quality of products, ...