Inlet pressure difference of centrifugal pump
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In our facility, the methanol-poor pump systems operate in a one-in-one-backup configuration; one pump is located far from the tank while the other is located near it. When the pump that is far from the tank is in operation, the inlet pressure difference tends to be high. Is this due to design reasons? Is such a design unreasonable?
Is the inlet pressure gauge shared? As long as the flow rate and pressure at the pump outlet are sufficient and there is no vacuum, it can be tolerated. Even design issues vary in severity; the location of the pump, or the inlet pipe of the pump, should be made larger.
There is a differential pressure gauge for each; the range of these gauges is 20 kp. When one of them is in operation, the differential pressure is around 5 kp, while when the other one is in use, it’s in the range of ten several kp