×
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

Super Capacity Pressure Relief Valves

Super Capacity Pressure Relief Valves

Super Capacity Pressure Relief Valves

(OP)
FARRIS markets some super capacity PRV's with orifice sizes designated at U (31.5 in2), W, W2, X,Y,Z (176.7 in2).

Does anyone have experience with these ?
Are they acceptable? Do they meet codes?
What are the pros and cons?

We have a light hydrocarbon application with a set pressure of 50 psig that requires 17 8T10 conventional valves. Could a few of these larger PRV's be used as an alternative?

RE: Super Capacity Pressure Relief Valves

We use Farris valves extensively, mainly the 2600 series you are referring to.  No specific experience with the super capacity valves, but the main drawback I see is weight.  Those things are heavy!  Otherwise, they are built to ASME Section VIII and capacity certified.  Acceptability beyond that has to be defined by the user.

RE: Super Capacity Pressure Relief Valves

(OP)
Thanks for the information.

I agree that the weight is a consideration but the large number of 'T' size valves is more of a concern for us. We have used rupture-pin (Callidus) and buckling-pin (BS&B) devices in another installation and these are also very large and weighty. This is fairly inevitable (given the capacity requirements) if you are going to use fewer devices. The other devices have their own installation and maintenance issues, so there may be some preference to stay with the more widely accepted design of a much larger standard spring loaded valve.

RE: Super Capacity Pressure Relief Valves

I have over twenty years previous experience with the super capacity valves - not from Farris in particular but rather with Lonergan and Crosby. Other than the weight and long leadtime for parts, there is nothing to be concerned about using these. If these ever have to discharge in gas or vapor service they produce one hell of a thrust (I seen one blow down a chain link fence 40 feet away), so be sure the discharge piping is well designed to handle it.  

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