×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Foot valve

Foot valve

Foot valve

(OP)
Hi guys,

I would like to calculate the loss of head in a 20" foot valve for a velocity of the fluid (water) about 1.2 m/s.

The most important factor are the losses in the screen retainer (i suposse), so should be interesting to know any kind of chart for calculate the losses depending the shape, diameter and the number of the circles of the string.

Thanks in advance.

RE: Foot valve

Each make of valve is slightly different from the others. Get the pressure drop vs flowrate chart from the manufacturer of your specific valve. Using a generic method will be more difficult and less accurate.

RE: Foot valve

duika,

as far as I know, the screen retainers are designed to have an open flow area similar to the nominal diameter of the pipe, so their pressure loss is no the most significant item.
The valve itself creates higher pressure losses.
If you install a nozzle check valve, the prssure loss may be as low as 5.5 mbar at 1.2 m/s.
They are non-slamming without dampening and available at www.noreva.de or hgustorf@noreva.de

RE: Foot valve

Screens are usually designed at a much larger area than the nominal flow area to minimize losses associated with the screen opening themselves.  That is why you usually see conical screens or large drum type screens.

I would hope the manufacturer will have the emperical data you need.  Just make sure they give you the data for your entire valve system, inclusive of the screen.  A lot of times the first level sales reps don't have this info and you need to dig back to corporate engineering.  Don't give up until you get the info you need!!!!

BobPE

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources