NPSH
NPSH
(OP)
Hello Guys,
Good day!
When we calculate for the NPSH with Strainer installed, is it correct to assumed that:
NPSH = Atm. pressure + Static Pressure - Vapor pressure - Pipe/Fittings/Valves pressure loss - Strainer pressure loss
The thing is, I am thinking that A pressure drop shall be considered for a strainer corresponding to its flow rather than equivalent length of pipe.
Let me hear your insights/.
Thanks in advance.
Good day!
When we calculate for the NPSH with Strainer installed, is it correct to assumed that:
NPSH = Atm. pressure + Static Pressure - Vapor pressure - Pipe/Fittings/Valves pressure loss - Strainer pressure loss
The thing is, I am thinking that A pressure drop shall be considered for a strainer corresponding to its flow rather than equivalent length of pipe.
Let me hear your insights/.
Thanks in advance.





RE: NPSH
The recommended way to monitor the dP across that strainer is a dedicated dP gauge. Unless you can allow 10 psi pressure drop, I would not want to use two separate pressure gauges and subtract the downstream value from the upstream value.
RE: NPSH
I use the chart (flow vs. pressure drop vs. size) provided by the manufacturer.
Yes, this drop is base as when the strainer is clean..
Regards,