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

Steam pressure vs temperature

Steam pressure vs temperature

Steam pressure vs temperature

a heat exchanger is to be supplied with steam at 147 psig and (363F) from higher steam source @429 psig& 456 F through pressure control valve,
my question what will be practically the temperature downstream the pressure control valve, since there's no heat exchange? is it as per the steam table 147 psig correspond to 363F.

RE: Steam pressure vs temperature

No, it is pretty close to the source temp of 456F. You might get some JT cooling, but this is a pretty small dP. The LP steam will be superheated, not saturated so the saturated steam table doesn't have much relevance.

David Simpson, PE
MuleShoe Engineering

In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. Galileo Galilei, Italian Physicist

RE: Steam pressure vs temperature

Estimate this to be at 405degF downstream of the PCV at 147psig (still superheated), so you have to desuperheat another 42degF to reach saturation temp of 363degF.

RE: Steam pressure vs temperature

What kind of solution to desuperheat the steam and achieve 363 F.

RE: Steam pressure vs temperature

Here is a sample vendor offering desuperheater nozzles - there are some others also which you can find on the net.


You may wish to buy the desuperheater nozzle only from this vendor and fix up the PCV and TCV and piping yourself if that suits you.

RE: Steam pressure vs temperature

Thanks a lot georgeverghese

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


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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