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How to control and regulate the flow rate of multistage centrifugal pump?

06 Nov 2023Email

         Each model of multistage centrifugal pump has a certain flow range value, customers can adjust the flow according to their own needs, some customers who use multistage centrifugal pumps for the first time recently consulted us Changsha Zoomlian Pump Industry wants to know how to control and regulate the flow of multistage centrifugal pumps? Next, Xiaobian will introduce to you the method of flow control and adjustment, which is convenient for users and friends to reference. Generally, the methods commonly used to control and regulate the flow rate of multistage centrifugal pumps include adjusting the piston or piston stroke, adjusting the stroke and pump speed, among which the way of adjusting the stroke is the most widely used, and the method is simple and reliable. There are three specific ways to adjust the stroke:   

multistage pump(29)

Horizontal multistage centrifugal pump

        1. Manual adjustment when stopping: manually adjust the stroke of the multistage centrifugal pump when stopping.

        2. Manual adjustment during operation: change the axial displacement during the operation of the pump to change the radius of the crank concisely to achieve the purpose of adjusting the stroke length. Commonly used methods include N-shaped crankshaft adjustment, L-shaped crankshaft adjustment and eccentric cam adjustment.

        3. Automatic adjustment during operation: there are two common types: pneumatic control and electric control. Pneumatic control is to achieve the purpose of automatically adjusting the stroke by changing the pressure signal of the air source; Electric control is to achieve the purpose of automatically adjusting the stroke by changing the electrical signal. In the case of the determination of the metering medium and working pressure, the two-dimensional adjustment of the output flow rate of the metering pump can be realized by adjusting the stroke length and reciprocating frequency. Both the inlet stroke length and the reciprocating frequency can be used as adjustment variables, but in engineering applications, the stroke length is generally regarded as a coarse adjustment variable, and the reciprocating frequency is a fine adjustment variable: adjust the stroke length to a certain value, and then realize fine adjustment by changing its frequency, so as to increase the flexibility of metering pump adjustment.

        In relatively simple applications, it is also possible to set the stroke length manually, using only the stroke frequency as the adjustment variable, thus simplifying the system configuration.

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