How To Choose A Centrifugal Pump?
I:centrifugal pump selection lists the basic data:
1,the characteristics of the medium: the name of the medium, specific gravity, viscosity, corrosive, toxic, etc.
2,medium contained in the solid particle diameter, how much content.
3,medium temperature (℃)
4,required for centrifugal submersible water pump flow General industrial pump can be ignored in the process of pipeline system leakage, but affected by the change of flow must be considered.Agricultural use, if is adopted, open channel water pump must also consider leakage and evaporation.
5,pressure: suction tank pressure, water pressure, the pressure drop of pipeline system (head losses).
6,pipeline system data (diameter, length, kinds and number of pipeline accessories, vacuum pressure to the pool geometry level, etc.).
7,the material of centrifugal pump and sealing form
8,according to the capacity and head to choose suitable use range and structure of the pump.
9,according to the installation site selection in the form of fresh water pump (vertical, horizontal, transmission form)
10,according to the power supply, select the drive power
11,choose according to use the structure of the pump, fresh water pump, mud pump, sewage pump, etc.)
II: the determination of flow head flow multistage centrifugal pump selection:
1.The centrifugal pump if the production process has been given the minimum, normal and maximum flow, should be taken into account by the maximum flow.
2.If give only normal flow in the production process, should consider to have a certain margin.For ns > 100 large capacity low head pump, flow take 5% margin, the ns < 50 small flow high lift pump, the flow take 10% allowance, 50 ns pump of 100 or less, or less traffic allowance is 5%, the pump of the inferior quality and operating conditions, traffic allowance shall be 10%.
3.If basic data only to weight rate, should be converted to volume flow.