Working principle      

The three spindle screw pump is a positive displacement rotary pump.It is mainly made up of drive screw、idler screws and pump bush(pump casing).As the flanks of teeth of drive screw and idler screws are engaged and the screws are also matched with the three insert holes,several sealed moving chambers are formed between the pump in-let and out-let end.These closed chambers will take the medium inside to move the in-let end axially and let flow pressurized progressively,to havea continuous、constant、axial flow pressured liquid.

Feature

Liquid is delivered in axial direction continuously without agitation,and pulsation,so screw pump has constant capacity and pressure,smooth running,small vibration and low noise.
   Screw pump has a very high suction capability.It needn＇t bottom valve and other equipments.
   The drive screw is driven by motor and the idler screw is driven by the pressured liquid,there is no mechanical contact between the drive screw and the idler screws,between the drive screw and idler screws ,screw set and insert an oil film is formed,so the mechanical friction is minimized and a longer life is ensured.
Screw pump has single suction、double suction and horizontal installation、vertical installation pump.In order to ensure the safe working of pump,motor,piping system,screw pump is equipped with safety valves.
   Pump has no many parts、simple construction and light weight.