Net Positive Suction Head (NPSH) of centrifugal pump

What are the key terms of centrifugal pump?   1. Working point: the point on the performance curve that represents the actual running condition of the pump is the intersection of the head curve and the resistance curve.   2. Specified point: the point determined by the specified flow rate and the specified head on the performance curve.   3. Head rise: the algebraic difference between the total water head at the outlet and the total water head at the inlet.   4. Close Yangcheng: the total head when the pump flow is zero.   5. Specified head: the total head corresponding to the specified flow rate on the contract sheet.   6. Cavitation margin: The difference between the absolute total water head at the inlet relative to the NPSH reference plane and the vaporization pressure head.   7. Allow suction vacuum height: For different types of pumps and different operating conditions, consider a certain safety margin of suction vacuum height.   8. Rated flow: the flow rate at the guaranteed point.   9. Pump output power: the power transferred to the output liquid by the pump.   10. Pump input power (shaft power): the power transmitted from the drive machine to the pump.   11. Drive input power: the power absorbed by the pump drive.