Submersible pump should be how to selection

When we choose the submersible pump, we should first consider whether the normal submersible pump manufacturers, and then confirm the parameters, understand the market conditions, to confirm the price of submersible pumps, the following we say for the submersible pump selection method.
1, the submersible pump flow is selected one of the important performance data of submersible pumps, it is directly related to the entire production capacity and transmission capacity. Such as the Design Institute process design can calculate the pump normal, minimum, maximum three kinds of traffic. Select the submersible pump, based on the maximum flow, taking into account the normal flow, in the absence of maximum flow, it is usually desirable to 1.1 times the normal flow as the maximum flow.
2, the installation system is required to lift the pump is another important performance data, the general use of amplification 5% -10% margin to head selection.
3, the liquid properties, including the name of the liquid medium, physical properties, chemical properties and other properties, the physical properties of the temperature c density d, viscosity u, solid particles in the media diameter and gas content, which involves the system head, Erosion margin calculation and the appropriate type of pump: chemical properties, mainly refers to the liquid medium of chemical corrosion and toxicity, is the choice of pump material and the choice of an important basis for the type of shaft seal.
4, the device system piping layout conditions refer to the high degree of liquid to send liquid to send liquid from the direction of the suction side of the minimum liquid level, the discharge side of the maximum liquid level and some data and pipe size and length, material, pipe specifications, the number And so on, in order to carry out the comb head calculation and the NPSH check.
5, the operating conditions are many, such as liquid operation T saturated steam power P, suction side pressure PS (absolute), discharge side container pressure PZ, altitude, ambient temperature operation is the gap or continuous, the location of the submersible pump Fixed or movable. Submersible pump with high speed, small size, light weight, high efficiency, large flow, simple structure, no pulsation of the infusion, stable performance, easy operation and easy maintenance and so on. So that the selected submersible pump type and performance in line with the device flow, head, pressure, temperature, cavitation flow and other process parameters. Mechanical reliability, low noise, vibration. The economy to take into account the equipment costs, operating costs, maintenance and management costs the lowest total cost.
 
Therefore, in addition to the following circumstances, should be used as far as possible submersible pumps:
1, metering requirements, the choice of metering pumps
2, the head request is very high, the flow is very small and not suitable for small flow high-lift submersible pump can be used, the choice of reciprocating pump, such as cavitation requirements are not high can also use the vortex pump.
3, head is very low, large flow, the choice of axial flow pump and mixed flow pump.
4, medium viscosity (greater than 650 ~ 1000mm2 / s), consider the choice of rotor pump or reciprocating pump (gear pump, single screw pump)
5, the medium containing 75% of the gas flow rate is small and the viscosity is less than 37.4mm2 / s, the choice of vortex pump.
6, the start of frequent or inconvenience irrigation pump occasions, should be used with self-priming performance of the pump, such as self-priming pump, self-priming vortex pump, pneumatic diaphragm pump.