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


Reciprocating compressor - discharge line check valve

Reciprocating compressor - discharge line check valve

Reciprocating compressor - discharge line check valve


What is the best solution for check valve at reciprocating compressor discharge line? Now there is installed stopcheck valve 1500 lb, 6 inch, whith pressure seal. 20 MPa op.pressure, fluid is hydrogen, op. Temp is up to 80 celsius. What is the best check valve for this services? This valve has solid metal gasket as presdure seal, and is problematical due to leakages. Is better solution to use jacketed (graphite core is covered with ss thin plate) pressure seal?


RE: Reciprocating compressor - discharge line check valve

Point #1, If you check the detailed mechanical drawings of your Reciprocating Compressor you will find that each Discharge Cylinder has a Leif & Spring back-flow preventer (i.e.: Check Valve) https://www.google.com/search?q=Images+of+Leif+%26...

Point #2, A Reciprocating Compressor is a piston oriented "positive displacement" (PD) vapor mover. A PD Pump normally does not need a Check Valve.

Here is another internal (Recip Comp) Check Valve.


RE: Reciprocating compressor - discharge line check valve

Interesting point, but I have never seen a reciprocating compressor (or a screw compressor, also PD, for that matter) installed in industrial service without a skid-level discharge check. Not one in thousands of compressor installations. They are so ubiquitous that I've never questioned why they are there. I'm going to have to think about this some more.

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: Reciprocating compressor - discharge line check valve

A check valve is often used with an unloader valve. The more pipe volume there is between the compressor and an external check valve, the more time the compressor has to get up to speed before building pressure. This only applies to some types of unloading schemes, not all.

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


eBook - 10 Reasons to Choose CATIA on the Cloud
To compete in today’s fast-paced and competitive market, smaller and newer firms need a powerful platform that will enable them to compete with bigger players, without the heavy investments needed in computer hardware, software and personnel. Download Now
White Paper - Smart Manufacturing for Electronics
This white paper describes a transformative approach to electronics manufacturing made possible by the addition of Mentor Graphics to the Siemens family. It describes a completely digitalized strategy that supports both printed circuit board (PCB) and mechanical design and manufacturing, uniting the entire product lifecycle – from idea and production to customers and back. 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