Screw pump overview, screw pump is a positive displacement rotor pump, it is by the screw and bushing formed by the volume of changes in the volume of the sealed chamber to draw in and out of the liquid. Screw pump according to the number of screw is divided into
1, use and management, axial flow pump high specific speed pump general specific speed 500 ~ 1000 due to the higher speed the lower head flow more due to the axial flow pump qv-H performance curve steeply drop should be discharge pipeline valve closed otherwise power
Under the condition of low flow rate, the internal loss of axial flow pump is very big, and the pump efficiency is low. With the increase of flow rate, the pump efficiency is very high under the rated condition, so the shaft power of the pump is high under the condition of low power.
