The advantages of Xinglong XS Series twin-screw pump (external bearing) structure greatly broaden the scope of use of the twin-screw pump, that is, in addition to the delivery of well lubricated media, it can also deliver a large number of non lubricated media, various viscosity (up to 3 * 106mm / s) media and corrosive (acid, alkali and other properties), abrasive liquids. Because the moving parts do not contact each other when working, the short-term dry running will not damage the pump components, which provides great convenience for the automatic control process.