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

control valves versus self acting regulators

control valves versus self acting regulators

control valves versus self acting regulators

Hi, While sizing and selecting a control valve I understand that the term Cv is used and this is calculated using ISA 75.01 standard for valve sizing.However for a regulator there are no such standards and capacity of a regulator is determined from the flow rates published at certain droop. If both regulators and valves are used on similar applications then why two different sizing methodology? Any thoughts

RE: control valves versus self acting regulators

A control valve does not include any controller. Cv is the information one needs in order to select a control valve. A regulator has an integral controller which is what causes droop. Droop is the information that one needs to select a regulator.

RE: control valves versus self acting regulators

A proprotional controller introduces droop; an integral controller eliminates it. Most mechanical regulators don't have an integrating elelment.

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


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