Conical Strainer Pressure Drop

[Mech85]

Hi,
I'm am looking for typical pressure drops across DN 750 (30") and DN 600(24") conical strainers on a cooling water application. Flow rate is approx 2400m3/h (~10,000gpm). The strainers are fabricated from 3mm (1/8") perforated plate and the open area is 150% of line cross sectional area. Local supplier cannot help with data.

I have looked on web and found infomation from Leslie Strainers and ISLIP flow controls on temporary srainers. However their charts are based on 40% open area and I don't think you can extrapolate to 150%. Can anyone assist?

 

[stanier]

I dont think that at 150% of open area there is going to be a significant pressure drop. When the strainer becomes clogged there will be a presure drop worth considering.

Idelchik Ch8 Flow Resistance A Design Guide for ENgineers covers such devices with uniform openings that cross the flow path. I am a busy at the moment so cant do the calculations for you. i am sure you can find the reference in a technical library.

Go to

http://www.pipingdesign.com

and see my papers on surge analysis.

 

[Mech85]

Thanks Stanier,

I am chasing up a copy of Handbook of Hydraulic Resistance by Idelchik but won't be able to get a copy for a little while. If you happen to complete calculations, I would be interested in results.

 

[stanier]

Hi Perth1

I do apologise but I am busy right up to Christmas and then am away. I come back to a commissioning of some aviation fuel lines thta cant be put off.

If you look at the papers I have referred to you will find my email address (I cant publish it here). Send me an email and I might just be able to scan the pages and send them to you.