Pump selection methods and steps

the pump selection, the pump selection, the method of pump selection step

in the actual production, often needs to according to the requirement of the process is put forward, and choose the pump type and matching of the motor. To the selected

the pumps hope it has a wide scope of work, the working condition of change belongs to the scope of efficient workspace, convenient operation and maintenance, stable performance

, long service life, reliable and good suction performance, late less investment, small size, light weight, low cost and easy management. Concrete pump selection method and the pump selection, complete the following steps:

( 1) List the basic data in the flowsheet. Draw a process flow diagram, listed process parameters, including the physical medium

( Viscosity, density, saturation vapour pressure, corrosion resistance, etc. ) And operating conditions ( Including vacuum, position of liquid level, pressure, operation

temperature, processing fluid volume, pipe length, structure, altitude, etc. ) 。

if the medium is water and can flow into the water pump to use the conventional centrifugal pump series need to use vertical centrifugal pump, vertical installation need horizontal installation with horizontal centrifugal pump, suggest to choose the new motor and pump body is convenient disassembly repair pipe circulation pump.

below is the new vertical centrifugal pump motor and pump convenient disassembly

if the water level is lower than water pump self-priming height within 5 meters can only choose so capable of self-priming pump products such as: self-priming centrifugal pump if medium is sewage containing sundry self-priming sewage pump is a suggested alternative products, if the self-priming height more than 5 meters or pump inlet piping is longer then suggested to choose the company's high self-priming pump suction products, high self-priming pump suction self-priming height are horizontal distance within 9 meters to 300 meters, more than the value that can only choose submersible pump series is more appropriate.

chart for the company's high self-priming pump suction self-priming height can reach the level 9 meters distance can reach 300 meters ( How far can need according to the actual flow accounting head suction)

if you want to choose a large flow and convenient lightweight mobile we recommend to choose new large flow of portable submersible pump motor drive it is also have according to the different requirements of hydraulic motor drive configuration are

the figure below for large flow portable submersible permanent magnet motor ( 400 cubic meters per hour, head - 8 10 meters weight only 36 kg) And also the custom which has the function of cutting big flow portable submersible pump

below for hydraulic drive hydraulic submersible pump ( Capacity of 450 m3 / h head 10 meters, weight is only 36 kg, flow 1000 cubic meters per hour head weight of about 10 meters, only 80 kg) And also can custom which has the function of cutting hydraulic submersible pump, would like to know you can refer to: hydraulic submersible pump

medium has certain viscosity with centrifugal pump suction under the condition of fixed advice or choose diaphragm pump series screw pump, can also use and CAM rotor pump, gear pump, as long as the medium can flow more than several pumps can suggest choose pneumatic diaphragm pump with large if corrosive because diaphragm pump pump body material has all kinds of stainless steel or PP plastic and PVDF material for the use of different media, has a very large viscosity suggest choose low speed screw pump or CAM rotor pump, the effect is better.

when you need to pump metering function then choose series of metering pump, metering pump is divided into diaphragm metering pump and plunger pump, need to pay attention to if prohibited in the process of selection of medium leaking so please don't choose because plunger metering pump plunger metering pump is to use will appear in the packing seal used drip phenomenon, please change the diaphragm metering pump or need hydraulic metering pump, the pressure is higher, please when you need to pump for pumping air reaches a certain negative pressure is series vacuum pump, vacuum pump is divided into many kinds of conventional vacuum pump water ring vacuum pumps, rotary vane vacuum pumps, water ring vacuum pumps for liquid cooling loop and the suction air is mixed with liquid side by side, rotary vane vacuum pumps can be divided into oil lubrication type rotary vane vacuum pumps and rotary vane vacuum pump oil.

( 2) To estimate the capacity and head of the pump. The calculation of pump flow is the biggest flow or the normal flow of l. 1 times, according to the pump's

figure, estimate the hydraulic loss of the pipeline, again by formula 'to determine the pump lift.

( 3) Choose the pump type and model number. Must change the pump speed or to H - using the method of cutting impeller diameter Q performance curve

line just after the capacity and head.

if according to the calculation of the capacity and head can't find a suitable pump ( The capacity and head is not suitable for quadrilateral,

and near the quadrilateral) Can use two pump of series or parallel throttling or taken to meet the technological requirements, or to choose

with other types of pumps. Choose a pump concrete, should also be the special requirements of test process, the change in the flow if you want to lift the basic not

change, can select pump characteristic curve are flat, and should avoid unstable working condition of operation.

Nowadays, the adoption of submersible pump in pool cover drain pump industry is quite common.
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