can vacuum on pump discarge cause pump cavitation
can vacuum on pump discarge cause pump cavitation
(OP)
If vacuum is applied to the discharge side of a grinder pump, would it cause the pump to cavitate or cause other damage?
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can vacuum on pump discarge cause pump cavitation
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RE: can vacuum on pump discarge cause pump cavitation
Independent events are seldomly independent.
RE: can vacuum on pump discarge cause pump cavitation
Given that pumps exist to create a difference in pressure, if you apply a vacuum to the discharge whilst it is running, then yes the inlet pressure will drop and you will cause cavitation, possible excess flow and overload of the motor.
Give us a few more figures and data and you might get a more considered response.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: can vacuum on pump discarge cause pump cavitation
RE: can vacuum on pump discarge cause pump cavitation
More detail of your operation wouldn't hurt the discussion.
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: can vacuum on pump discarge cause pump cavitation
Independent events are seldomly independent.
RE: can vacuum on pump discarge cause pump cavitation
Something that could cause a problem, assuming it is a submersible grinder pump and depending on the pump configuration is that the mechanical seal faces could be opened as a result of the lower pressure on the impeller side of the unit compared to the pressure on the motor / drive side of the unit.
More detail is required.
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: can vacuum on pump discarge cause pump cavitation
RE: can vacuum on pump discarge cause pump cavitation
If it's a 150 ft or more then it probably doesn't make a lot of difference, but will increase flow a bit. Do you need the vacuum truck to apply sub atmospheric pressure or does the pump manage to pump anyway?
If it's right next to the pump it won't do it a lot of good, but even then this is a recessed impellor pump so will probably survive without much impact. If it starts making an odd noise, or the motor trips, turn it off. You will still get flow with this sort of pump if you apply lower pressure on the far side.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: can vacuum on pump discarge cause pump cavitation
thanks in advance for all the reply's!
RE: can vacuum on pump discarge cause pump cavitation
Your pump should be able to pump without the truck, but not at a very high rate.
With this vertical lift and the length of pipe from truck to pump, this will not cause the pump to cavitate or be harmful to the pump.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way