×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

*
*
*
*

Thanks. We have received your request and will respond promptly.

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

Turbine inlet On/Off Valve

thread135-418822

Turbine inlet On/Off Valve

Turbine inlet On/Off Valve

(OP)
I need to know what is the effect of having ON/OFF valve on the steam inlet TO turbine in fail close vs. fail open?
The purpose of the turbine is to drive rotary pump continuously. There is a 2" ball on/off valve on the steam inlet to the turbine.
Most of the turbine inlet valves are fail open.

RE: Turbine inlet On/Off Valve

If this valve is in safety shutoff service, it should be FC. Else this can only be an operational or control valve in on / off service.

RE: Turbine inlet On/Off Valve

If the turbine begins to over speed, the main steam inlet flow to turbine must be shut off immediately ; if not it will add energy to the rotor sustaining its acceleration with a risk on machine mechanical integrity ; safety / hazard consequences including potential catastrophic failures can occur because of turbine over speed.

RE: Turbine inlet On/Off Valve

Most turbines I've dealt with have an overspeed trip built right in, often directly acting upon a separately-actuated valve that functions independently of any other shutdown system. If that is the case here, overspeed trips should not become part of this discussion.

CR

"As iron sharpens iron, so one person sharpens another." [Proverbs 27:17, NIV]

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

Resources

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