Regarding the inlet pressure of the pump
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In production, more attention is paid to export pressure; why isn’t inlet pressure discussed as much? If it’s the same pump, in one case liquid is drawn from a sump (where the liquid level is below the inlet pipe), and in another case it comes from a tank (where the liquid level is above the inlet pipe). What impact do these two situations have on the pump’s inlet pressure?
Then, when designing, it’s sufficient to take into account the different inlet net positive suction heads.
In production, most of the material entering the pump comes from the equipment, and process control generally requires stable pressure within the equipment; therefore, under normal operating conditions, the pressure at the pump inlet remains constant.
Primarily, it’s sufficient as long as the net positive suction head is adequate; different inlet pressures also have an impact on the outlet pressure
Reply to 3# cloudrever: What is the difference in the impact on inlet pressure between those two conveying methods I mentioned?