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NPSHR value for piston pump 1
- Thread starter Badjuz
- Start date
LittleInch
Petroleum
Established by the vendor.
Usually quite low (2-3m) but it's not something you can calculate, only test.
Piston pumps also need to consider acceleration pulses in the inlet line.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
Usually quite low (2-3m) but it's not something you can calculate, only test.
Piston pumps also need to consider acceleration pulses in the inlet line.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
From memory this has been discussed msny times here, suggest you search for info .
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.)
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.)
- Thread starter
- #5
Thanks all.
Actually we'd like to relocate pump unit.
However for this old pump, the documentation is missing.
Of course for NPSHA and acceleration head we can calculate.
We still search for NPSHR value.
If anyone have experience of NPSHR with similar or close size of pump, this will be helpful.
Actually we'd like to relocate pump unit.
However for this old pump, the documentation is missing.
Of course for NPSHA and acceleration head we can calculate.
We still search for NPSHR value.
If anyone have experience of NPSHR with similar or close size of pump, this will be helpful.
LittleInch
Petroleum
70 rpm is pretty slow.
My guess is not more than 4m
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
My guess is not more than 4m
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
georgeverghese
Chemical
Configure this system without relying on the suction dampener to reduce acceleration loss - all the dampener really does is to attenuate the pulsations to some extent, even when it does work well. At the least, get a triplex double acting to cut down acceleration loss. Cheapo duplex will almost surely get you into trouble with Operations Dept,unless you have plenty of NPSHa.
LittleInch
Petroleum
How much NPHHA so you have?
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
-
1
- #9
I guess the following can give you that you are after.
This might be another one.
LittleInch
Petroleum
Some great info there.
From the first one 70 rpm is 3 psi for the biggest plunger. So about 2m.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
From the first one 70 rpm is 3 psi for the biggest plunger. So about 2m.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
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