×
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

How to find Cg from given info

How to find Cg from given info

How to find Cg from given info

(OP)
I have given the Cv as 0.115 and Cg as 27,000 CFH at full cylinder. This is a fisher control valve. Upstream pressure is 500 psig and relief pressure is 425.7 psig. I am trying to find the maximum flow through the control valve. The flow medium is air with 5% Helium. I have a template to find the maximum flow rate. But i need the Cg as constant. Could you please somebody help me in converting the Cg to constant. Stonecold and other guys explained me but I haven't understand exactly.
Thanks in advance

RE: How to find Cg from given info

See the other post I have made in the other thread.

I hope this helps. You have to make a guess of Cl given the data avaliable. The valve vendor may be able to assist you will accurate values for Cl that they have used. Some just use 30.

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