1 according to the principle is divided into volume pump, vane pump, jet pump. Volumetric pumps rely on changes in the volume of the studio to transport liquid pumps, such as reciprocating pumps, rotor pumps, gear pumps, screw pumps. Vane pumps rely on the rotation of the impeller to deliver liquids such as centrifugal pumps, axial flow pumps and the like. Jet pumps rely on the energy of the working fluid to deliver another fluid. Such as jet pump, water heater and so on. 2 divided by the prime mover steam turbine, steam reciprocating pump, electric centrifugal pump, electric reciprocating pump. 3 Press the transmission medium points: a pump, pump, acid pump, alkali pump. 4 according to the installation position of the shaft splitter pump, horizontal pump. 5 according to the temperature of the medium transport cooling medium pump, heat medium pump. 6 by impeller points sub-single-stage pump, two-stage pump, multi-stage pump. 7 by the impeller feed points single suction, double suction. 8 according to the form of the pump shell sub-horizontal open, vertical segmented.
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