NPSH Value rate
NPSH Value rate
(OP)
Hello;
Why NPSH value should be less than reel value. For instance pumps datasheet normal NPSH is shown 7 meter besides "NPSH required must be less than 50% of NPSH available" is noted.
What is the reason??
Thank you...
Why NPSH value should be less than reel value. For instance pumps datasheet normal NPSH is shown 7 meter besides "NPSH required must be less than 50% of NPSH available" is noted.
What is the reason??
Thank you...





RE: NPSH Value rate
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: NPSH Value rate
It is NOT the level at which the pump starts to cavitate, which can be anywhere from 1-5m higher
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: NPSH Value rate
RE: NPSH Value rate
The OP has said that NPSHr is 7 metres (have assumed that's what he meant), therefore NPSHa will have to be in excess of 14 metres - excessive or reasonable.
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: NPSH Value rate
RE: NPSH Value rate
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: NPSH Value rate
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.)