2006-07-30 08:39:59 · 4 answers · asked by ahmedkayaty 1 in Science & Mathematics ➔ Engineering
That's a good one. NPSH stands for Net Positive Suction Head.
It is the difference in pressure between the vapor pressure of the fluid being pumped and actual pressure on the suction side of the pump.
The Available Suction Head depends on how the pump is installed and pressure drop at a given flow rate for the fittings ect. on the suction side of the pump.
It is important because if the available suction head is less than the NPSH required the pump will cavitate. When this happens the fluid actually boils inside the pump or at least tiny bubbles form. When these bubbles collaspe the pump will sound like it's pumping gravel and will most likely be destroyed. Because the collapsing bubbles shoot out a jet of extremely high pressure and temperature fluid which actually cuts through the metal of the pump.
2006-07-30 08:56:56 · answer #1 · answered by Roadkill 6 · 5⤊ 0⤋
Npsh Definition
2016-11-02 23:50:56 · answer #2 · answered by ? 4 · 0⤊ 0⤋
Most probably means "Net Positive Suction Head" but it can also be an acronym for "National Pipe Straight Hose" (garden hose thread)
2006-07-30 16:14:29 · answer #3 · answered by QuietFire 5 · 0⤊ 0⤋
net positive suction head
go to: http://www.mcnallyinstitute.com/11-html/11-12.html
and http://www.engineeringtoolbox.com/npsh-net-positive-suction-head-d_634.html
2006-07-30 08:52:49 · answer #4 · answered by harps21 3 · 0⤊ 0⤋