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16
2024
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05
Regulating return valve and current of centrifugal pump
The performance of the centrifugal pump is a curve, not completely linear. The shaft power consumed by the centrifugal pump is only related to the flow of the pump, and the flow of the centrifugal pump is related to the outlet pressure. When the centrifugal pump has a return, the equivalent of the outlet pressure becomes smaller, the flow rate of the centrifugal pump is larger than the rated state, so the current of the centrifugal pump is increased. When you close the return valve of the centrifugal pump, the output flow of the centrifugal pump is actually reduced, and the shaft power required by the centrifugal pump is also reduced, so the motor current is reduced in response. Centrifugal pump as long as directly through the adjustment of the outlet valve can be achieved flow regulation. The function of installing the return pipe is only related to the process. Of course, some centrifugal pumps open the return valve when compressing the actual flow to reduce the damage caused by the pressure in the centrifugal pump to the machine seal.
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