×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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!

*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

self actuated pressure regulators

self actuated pressure regulators

self actuated pressure regulators

(OP)
we are having two self actuated pressure regulators on LPG Line to plant having inlet pressure of 270psig and set pressure of 14.7 psig.
the capacity of each regulator is 230kg/hr of lpg.however it was learnt that the capacity should have been 315kg/hr of LPG for each regulator.
these regulaors have been procured and installed at site.
now question is how to ensure that these regulators provide 315 kg/hr of LPG in place of 230kg/hr?
or a third regulator in pararllel is the only answer?

RE: self actuated pressure regulators

You've got to review the sizing calcs for this regulator and re run them to see if there is sufficient headroom to go from 230kg/hr to 315kg/hr at say no more than 95% of the wide open Cv at the higher flow. The regulator vendor could rerun these calcs for you in 5minutes flat. Am assuming that at 95% of max Cv, set point droop on this PCV is minimal - the supplier would know best. If you're in luck, the supplier would give you a larger size replacement trim off the shelf otherwise.

RE: self actuated pressure regulators

You call it a self acting regulator, I interpret that as a simple spring and diaphragm, this type of regulator has significant droop (pressure loss with flow)
You want to increase the flow by 37% I expect that would cause a significant drop in pressure, only the designer of vendor can tell you if it's possible without more detail.

Regulators with a pilot regulator (small regulator controlling a larger valve) tend to have better flow characteristics because it acts similar to a pressure amplifier

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! Already a Member? Login



News


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close