Regarding the shutdown of the pump when the liquid level is low, by how much must the low liquid level be above the pump’s suction inlet or pump casing? ? Which specification states this?

2016-06-30View Original

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Regarding the shutdown of the pump when the liquid level is low, by how much must the low liquid level be above the pump’s suction inlet or pump casing? ? Which specification states this?

Reply #22016-06-30

You calculate this based on the net positive suction head; as long as cavitation and suction vacuum do not occur, that’s fine

Reply #32016-06-30

If cavitation is not taken into account, how much higher than the suction inlet and pump casing must it be, as in the case of submersible pumps, for example? I mainly want to see in which standard this is described!

Reply #42016-06-30

It seems to be calculated based on the flow rate obtained by pumping for 15 minutes

Reply #52016-06-30

It mainly depends on the process; not much is specified. If necessary, it can be left blank, and the flow rate can be reduced to prevent cavitation and vortices

Reply #62016-06-30

I don’t understand what it means. Could you explain it?

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