Centrifugal pump selection issues
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Water at 152 degrees, with an inlet pressure of 0.5 MPa. The vaporization pressure of water is 0.476 MPa; then what should the net positive suction head available for the water pump not exceed?
The vapor pressure of water at 152 degrees is 0.5021 MPaA. Is the pressure you mentioned above gauge pressure or absolute pressure?
This is related to the installation height of the pump above the container.
Is the inlet pressure measured with a vacuum gauge or a pressure gauge?
What does the value for the common friction pair material combinations shown in the attachment screenshot represent, and what is its unit, in MPa·m/s?
The vapor pressure of water at 152 degrees is 0.5021 MPa
The product of the end face pressure Pc and the average sliding speed V of the sealing end face. To ensure reliable sealing and achieve the expected service life, the Pcv value of the mechanical seal must be lower than the allowable value (the value in the table)