The three spindle screw pumps are suitable for pumping various kinds of non-corrosive oil without contents of solid grains and liquids similar to lubri-cating oils, The viscosity of mediums to be conveyed range from 1.2 to 100°E(3.0 to 760cst), liquid with a higher viscosity could also be pumped after heating up (lowering down the viscosity).
   The flow range is 0.2~590m3/h ,and the maxi-mum working pressure is 100 bar, The highest tem-perature is 150

   Ship building : used for marine as cargo and stripping pump, ballast pump, lubricating oil pump for main machine, feul oil transfer and spray pump, load or unload oil pump.
    Power plant: Heavy and crude oil transfer pump, Heavy oil burning pump. Chemical industry: Transfer for variovs acid, alkali solution, resin, colour, printing ink, paint, glycirine and paraffin wax.
    Oil refinery: Transfer for various heating oil, asphalt oil, tar, emulsion, as—phalt, and also loading and unloading various oil goods for oil tanker and oilpool. 
    Food industry: used for brewery, food products factory, sugarrefinery, tin fac—tory to transfer for alcohol, honey, sugar juice, toothpaste, milk cream, soysauce, vegetable oil, animal oil and wine.
    Oil field: Transfer for various oil goods and crude oil and etc.
 

 The three spindle screw pumps consist of general design type 3G, marine usage pump 3GC and three screw pumps of special design.The three spindle screw pump is a postive dis-placement rotary pump. Inside the pump casing, as the flanks of teeth of drive screw and idler screws are engaged and the screws are also matched with the three inset holes, several sealed moving chambers are thereby formed inbetween the pump inlet and outlet end. These closed chambers will take the medium in-side to move from the inlet end axially and let flow pressurized progressively, to have a continuous, con-stant, axial flow pressured liquid.