×
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

GATE VALVES,NUMBER OF ROUNDS CLOSED

GATE VALVES,NUMBER OF ROUNDS CLOSED

GATE VALVES,NUMBER OF ROUNDS CLOSED

(OP)
ACCORDING TO ALL THE INFORMATION I HAVE FOUND, A 24" NRS SPLIT WEDGE GATE VALVE ,150# CLASS VALVE SHOULD OPEN 75 ROUNDS (3X THE VALVE SIZE PLUS 3),I HAVE A H+M GATE VALVE THAT WAS INSTALLED AROUND 1965 THAT ONLY OPENS 51 ROUNDS (2X + 3),I KNOW THAT THE VALVE IS IN GOOD WORKING SHAPE BECAUSE WE JUST PULLED IT APART AND LOOKED AT IT.DOES ANYONE HAVE ANY IDEA WHY THIS VALVE WOULD BE ANY DIFFERENT.

RE: GATE VALVES,NUMBER OF ROUNDS CLOSED

different thread pitch in the valves. In the 24' size it might be time to look at valves with a gear box so maintenance crews can shut it down under emergency situations without power assistance.

RE: GATE VALVES,NUMBER OF ROUNDS CLOSED

AWWA valves a limit on the force required on the handwheel to operate.  Seems to me it is 100 lbs but I would have to check to be sure.

So the number of rounds to open various sizes and classes of valves should be a function of the amount of effort required rather than a set number of turns.  Hence the use of gear operators on larger size valves.

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