|
It is possible to ensure that cavitation is
avoided during pump operation by monitoring the netpositive
suction head of the pump. Net positive suction head (NPSH)
for a pump is thedifference
between the suction pressure and the saturation pressure of
the fluid being pumped.NPSH
is used to measure how close a fluid is to saturated
conditions. Equation 3-19 can be usedto
calculate the net positive suction head available for a pump.
The units of NPSH are feet ofwater. 
where: Psuction
= suction pressure of the pump
Psaturation =
saturation pressure for the fluid
By maintaining the available NPSH at a level
greater than the NPSH required by the pumpmanufacturer,
cavitation can be avoided.
© Copyright 2000 - 2010, by Engineers Edge, LLC All rights reserved.
Disclaimer
|
