Centrifugal Pump Suction Design And Suction Performance Optimization

For example: The NPSH of hygienic pumps must be 4.0 meters, what is the suction head △h? Solution: △h = 10.33-4.0-0.5 = 5.83 meters From a safety perspective, the actual installation height of hygienic pump should be less than the calculated value. When the calculated Hg is a negative value, it means that the suction port of hygienic pump for food processing should be lower than the liquid level of the tank. Example 2-3 Check the allowable suction vacuum height Hs = 5.7m of a certain hygienic centrifugal pump from the sample. It is well known that the total resistance of the suction pipeline is 1.5mH2O, the local atmospheric pressure is 9.81x104Pa, and the dynamic pressure head of the liquid in the suction pipeline can be ignored. Trial calculation: 1 Installation of sanitary gear pump when conveying clean water at 20°C.