Process flow: Raw material--vacuum feeding--material dryness--single screw extruder--spiral mould--low-termeperature cooling calibrator, high level water tank--water cooler--DIP-in vacuum calibration tank--DIP-in cooling water tank--DIP-in cooling water tank--printer--belt haul-off--double winder--finished product inspecting&packing Salient features of PERT pipe:
