single screw extruder This extruder is used for producing PP,PE ,PPR pipe ... ModelSJ25/25SJ30/30SJ45/25SJ45/30SJ50/30Screw diameter ( ... technology, with characteristics of high precision, high complementarity and no color difference. They are made of 38CrMoAlA, nitriding processed according to ... art. The high speed screw is particularly designed for PP/PE. Nitriding thickness: 0.5-0.7mm, HV: 740-940 ...