×
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

ESDV Cv

ESDV Cv

(OP)
How could I know the Cv of the ESDV? all data sheet only refer to its size

RE: ESDV Cv

An ESDV is commonly a block valve (e.g. a ball). Its not very comon to state theCv of a ball valve due to the high value. If its for simulation then usually the softeware will have some default. It will usually do.

Best regards

Morten

RE: ESDV Cv

My first choice would be to ask the vendor of the ESDV valve.  

If they are for isolation, they are often gate or ball valves and a Cv may not be calculated for the data sheet.  I've seen Cvs published for ball valve (Orbit valves, full and reduced ports have available Cvs) but as MortenA points out, they are often very large because the valves when wide open are low pressure drop items.

If you need an estimate and the vendor has no data, you can use the L/D values in Crane for gate, ball, etc.  Using that and the friction factor you can calculate the K factor and then estimate the Cv using the approximate conversion factor in Crane.

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