Pressure drop through strainers
Pressure drop through strainers
(OP)
I need a conical strainer (wire mesh cloth possibly reinforced using perforated metal sheet) installed in a line between flanges. The strainer manufacturers I've talked to don't seem have a decent method of determining pressure drop.
Things that are known about the filter material are open area (percentage of total area) and mesh size.
Also can determine total conical area from dimensions of assembly.
What equations can be used to determine pressure drop for a gas? (helium).
Thanks for the help.
Things that are known about the filter material are open area (percentage of total area) and mesh size.
Also can determine total conical area from dimensions of assembly.
What equations can be used to determine pressure drop for a gas? (helium).
Thanks for the help.





RE: Pressure drop through strainers
David
RE: Pressure drop through strainers
That's good information. Thanks...
I need to know within about 0.1 psid what the strainer dP is and the flow rate is very high. An 8" double wafer check produces about 1/2 psid assuming it is wide open - which requires a very low spring load. dP is everything in this system.
That said, you've given me an idea. I suppose I could measure the dP once the system is set up. If I do that however, I'll need to come up with an alternate plan to mitigate the risk if I find the strainer dP is too high.
This isn't as easy as saying there's very little dP so it can be neglected, because even 1/2 psi dP will be a concern.
RE: Pressure drop through strainers
David
RE: Pressure drop through strainers
Thanks for your help.
RE: Pressure drop through strainers
I don't know of any reason that you couldn't fabricate a conical strainer with an ID that matches your pipe more closely.
David
RE: Pressure drop through strainers
RE: Pressure drop through strainers
Flow is roughly 4.5 MMSCFH helium at about -445 F. Pressure ~ 5 psi. I'm actually taking it off a process from a 6" pipe, opening it up to 8" for a short distance and eventually to 24". I can put the strainer in the 24" section, though the gas temperature is likely to rise significantly by then. Still, the 24" section looks much more promising.
shahyar, thanks for the tip. I'll take a look at Perry's soon.