×
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

Multi-bore Restriction Orifice Sizing

Multi-bore Restriction Orifice Sizing

Multi-bore Restriction Orifice Sizing

(OP)
Hi,
Do you have equations for sizing a multi-bore restriction orifice (RO) plate? Pls help- thanks!

RE: Multi-bore Restriction Orifice Sizing

You should be able to calculate the size of a single orifice and then you can use the equivalent orifice area in multiple ports.

RE: Multi-bore Restriction Orifice Sizing

>>>You should be able to calculate the size of a single orifice and then you can use the equivalent orifice area in multiple ports.<<<

Not exactly.  a bajillion small holes have a vastly greater perimeter-to-area ratio than a single large hole.  Wall effects affect the effective Cv. (Sorry, I had to do that)  

One handy number to bury in your day-timer: A 1/8" hole has a Cv of 0.27.  

You can pile in 1/8" holes until you get the Cv you need.  The holes should have a counterbore of at least 3/16" After 1/8" of plate thickness.  There is a limit on how many holes you can drill in a given size plate: if you drill the holes too close together, the plate can tear on the perforation and wind up destroying something expensive downstream.  Oh, and only use these on CLEAN flow.  They make good strainers.

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