How to select the type of submersible pump? The submersible pump selection should be selected from s

How to select the type of submersible pump?

The submersible pump selection should be selected from several aspects according to the actual field use process and water supply and drainage requirements:

1. Liquid throughput.

2. Device lift.

3. Liquid properties

4. Piping layout and operation conditions, etc.

1. The submersible pump flow is one of the important performance data of the submersible pump. It is directly related to the production capacity and transportation capacity of the whole device.Such as design institute process design.

Can calculate pump normal, minimum, maximum three kinds of flow.When choosing a submersible pump, the maximum flow rate is the basis and the normal flow is considered. When there is no maximum flow, it is usually desirable.

1.1 times normal flow as maximum flow.

2. The lift required by the device system is another important performance data of the selected pump, and it is generally used to select the pump with an amplification of 5% to 10% margin.

3. Liquid properties, including the names of liquid media, physical properties, chemical properties and other properties, physical properties have temperature c density d, viscosity u, solid particles in the medium are straight.

The content of the diameter and gas is related to the system's lift, the effective cavitation residual calculation and the type of the suitable pump: chemical property, mainly refers to the chemical corrosiveness of the liquid medium.

And toxicity, is the selection of the pump material and the selection of that type of shaft seal type of important basis.

4. The piping arrangement conditions of the installation system refer to the direction of the liquid delivery distance of the delivery liquid, the lowest liquid level, the highest liquid level of the discharge side and other data and pipe rules.

Lattice and its length, material, pipe fitting specification, quantity, etc., in order to carry out the comb head calculation and the steam corrosion residual quantity check.

5. There are many contents of operating conditions, such as the operation of liquid, T saturated steam force P, suction side pressure PS(absolute), discharge side container pressure PZ, altitude and ambient temperature.

The operation is between the gap and the continuous, submersible pump position is fixed or movable.

The submersible pump has high speed, small volume, light weight, high efficiency, large flow, simple structure, no pulsation of infusion, stable performance, easy operation and easy maintenance.

Points.The type and performance of the submersible pump can meet the requirements of the process parameters such as flow, lift, pressure, temperature and cavitation flow.Mechanical reliability,

Low noise and low vibration.The overall cost of equipment, operation, maintenance and management costs is the lowest.

Therefore, in addition to the following circumstances, the submersible pump should be selected as far as possible:

1. When measuring requirements, select the metering pump.

2. High lift requirements, low flow rate and no suitable small flow high-lift pump can be selected, and reciprocating pump can be selected, such as the whirlpool pump can be used when the cavitation requirement is not high.

3. The head lift is very low, and when the flow is large, the axial flow pump and mixed flow pump can be used.

4. When the medium viscosity is large (greater than 650~1000mm2/s), the rotor pump or reciprocating pump (gear type oil pump, single screw pump) may be considered.

5. When the medium contains 75% gas, the flow is small and the viscosity is less than 37.4mm2/s, the vortex pump can be used.

6. For occasions when the start-up is frequent or the pump is not easy to pump, the self-priming pump, such as the self-priming pump, the self-priming vortex pump and the pneumatic diaphragm pump, should be selected.