Classification
（1） according to working principle, structure
1） vane pump: through pump shaft rotation to drive various impeller blades to give liquid centrifugal or axial force, conveying liquids to pipe or containers, such as centrifugal pump, vortex pumps, mixed flow pump, axial-flow pump.
2） positive displacement pump: using pump cylinder content product continuous variation conveying liquid pumps, such as reciprocating pump, piston pumps, gear pump and screw pump.
3） other forms pump: there are using electromagnetic conveying liquid conductance posture electromagnetic pump, Through the use of fluid energy to transport the liquid pump, such as injection pump, air liters liquid machines etc.
（2） according to chemical usage
1） process flow pump: including feeding pump, reflux pump, circulating pump, rinsing pump, sewage pump, supplementary pump, output pumps, etc.
2） utilities pump: including boiler pump, water tower pump, fire control pump, water deep well pumps, etc.
3） auxiliary pump: including lubrication oil pump, sealing oil pump, hydraulic transmission pumps, etc.
4） pipeline pump: pipeline pumps, loading and unloading vehicle pumps, etc.
（3） according to transfer medium
1） water pump: including clear water pump, boiler pump, condensate pump, hot water pump.
2） anti-corrosive pumps: including stainless steel pump, high silicon cast iron pump, ceramic acid resistant pump, not permeability graphite pump, lining hard glue pump, rigid polyvinyl chloride pumps, canned motor pump, diaphragm pumps, titanium pump etc.
3） impurities pump: including slurry pump, sand pump, sewage pumps, pulverized coal pump, ash pump etc.
4） Oil pump: cold oil pump, hot oil pump, oil slurry pump, liquid hydrocarbon pumps, etc.
（4） according to using conditions
1） big flow and micro flow pump: flow respectively is 300m³/min and 0.01L/min;
2） high temperature pump and cryogenic pumps: high temperature can reach 500℃, low temperature to - Z53 ℃;
3） high-pressure pump and low-pressure pump: high pressure reaches 200MPa, vacuum is 2.66-10.66 kPa (20-80mmHg);
4） high speed pump and low speed pump: high speed reaches 24000r/min, low-speed is 5-10r/min,
5） precise metering pump: flow measuring precision is ±0. 3%.
6） high viscosity pump: viscosity reaches thousands of palmer seconds (Pa, s).
