×
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

Vacuum Relief Valve: maximum vacuum a tank can handle

Vacuum Relief Valve: maximum vacuum a tank can handle

Vacuum Relief Valve: maximum vacuum a tank can handle

(OP)
An inverted check valve is used for vacuum relief of a pressure vessel during emptying of the tank.

What would be a recommended maximum vacuum for purposes of selecting a check valve? The operating pressure is 35 psig, the tank will firstly be depressurized, and then emptied. The depressurization line is not sufficient for emptying the tank at the desired rate.

The appropriate size is 2" valve. 316SS is required material. The lowest opening pressure I have found on a check valve is 0.5 psi. Would a vacuum of 0.5 psi be non-consequential?

Thanks.

RE: Vacuum Relief Valve: maximum vacuum a tank can handle

Allowable vacuum can vary from approximately "none" to full vacuum. If you have the original design information on the tank, it may state a design vacuum. If not, if you have the geometry, it would likely be possible to calculate the allowable vacuum per ASME or other codes. It is likely to be over the 0.5 psi, but there's no way to know for sure without checking.

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