Centrifugal pump selection
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Hello everyone: I would like to know if there are any empirical values regarding inlet pressure and outlet pressure when selecting a centrifugal pump
What are empirical data on inlet and outlet pressures?
It has nothing to do with import pressure
This is determined based on your manufacturing requirements; where does such experience come from?
I don’t know where to start – is inlet pressure minus outlet pressure equal to head?
Subtracting the pressures gives the pressure difference; so how does head come about?
What I mean is, under normal conditions, what is the inlet pressure of a centrifugal pump? I read about book imports being <0.5MPA
It depends on the design of the pump. For example, in the case of a boiler water circulation pump, if the inlet pressure is several megapascals, would that mean the pump can’t be used? That requirement exists because the pump is designed to operate at a low pressure; if the inlet pressure is too high, combined with the pressure generated by the pump, it could exceed the pump’s designed pressure limit, which is why there is a restriction on the inlet pressure value
The last edit to this post was made by colien on 2019-1-23 at 11:58. 1. I agree with poster #4; since the topic is about selecting centrifugal pumps, the equipment chosen must meet the process requirements. When the process requirements are so stringent that no equipment manufacturer or supplier available on the market is able to produce equipment that meets those requirements ； Or, when considering economy and costs, it is necessary to adjust the process conditions in coordination with the process. 2. Head: H=△p/ρg 3. I don’t understand what the “normal conventional conditions” referred to by the poster are The original poster’s question is too general, and there are no practical suggestions that can be provided as a reference. Attached is a guide for selecting Caspian centrifugal pumps for reference:
Typed too quickly; it’s the pressure difference corresponding to the head: L