Strainer back pressure

albresco · May 19, 2003

Can anyone suggest a calculation method to determine the pressure drop for a fluid through a 10x10 strainer mesh?
Viscosity: 200cp
Flow: 180 GPM
Velocity 8 ft/sec
Tube dia: 2.875 ID
Screen 56% open area
The screen is formed into a vertical basket with a 4" dia flat end. It is 16" long and 9" dia at the basket open end. The strainer is inside a 10"dia x 18" long canister.
Thank in advance for any help

Doug

jte · May 19, 2003

Doug-

The Hayward Strainer web page might be useful for you:

http://www.haywardindustrial.com/strs/techdata.htm

For the Cv factor, depending on what kind of strainer you have, it might be available on the Hayward site. For example, some Cv's are listed at the bottom of:

http://www.haywardindustrial.com/strs/07str.htm

jt

albresco · May 19, 2003

Thanks JT
This formula is what I need, unfortunately, I am using a made-up strainer so I have no simple way of arriving at a Cv. I need to calculate that value.
Doug

TD2K · May 19, 2003

Can you talk to Hayward and get a dP for a given area and fluid and then correct it to your flow and conditions?

I'm thinking with something like the formulas in Crane you should be able to come up with a 'K' or 'Cv' term and then stick in your process conditions.

25362 · May 20, 2003

Perry VI Section V, gives (+/- 20%) estimates based on E.I. Dupont de Nemours & Co. data.

saxon · May 20, 2003

albresco, Remember, the values you calculate for the strainer drop will be for new /unused conditions. As time passes, and the strainer loads up, the pressure drop will increase. So the value calculated should be viewed as a minimum value.

saxon

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