×
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

CUT-IN CUT-OUT PRESSURE FOR FIRE PUMP and JOCKEY PUMP

CUT-IN CUT-OUT PRESSURE FOR FIRE PUMP and JOCKEY PUMP

CUT-IN CUT-OUT PRESSURE FOR FIRE PUMP and JOCKEY PUMP

(OP)
I just need to clear my mind on this...how should I specifically design the cut-in cut-out for both fire pump & jockey pump? Appreciate feedback on this. Thnks.

RE: CUT-IN CUT-OUT PRESSURE FOR FIRE PUMP and JOCKEY PUMP

Start the fire pump and note the maximum pressure on the discharge gauge. Let's say the pressure is 150 psi. Jockey pump would be set to come on at 140 psi and shut off at 150 psi. Depending on the type of pressure switch, the fire pump would come on at 130-135 psi. NFPA 20 covers the settings. The difference between 130 – 135 PSI would depend on the type of pressure sensing device. The older Mercoid type of devices are difficult to get a five PSI difference. The newer fire pump controllers using a pressure transducer and a PLC on the controller can be set at any pressure.

****************************************
Fire Sprinklers Save Firefighters’ Lives Too!
Interested in “Hands On” Fire Protection Seminars with live fires visit www.chubb.com/lcu for information.

RE: CUT-IN CUT-OUT PRESSURE FOR FIRE PUMP and JOCKEY PUMP

(OP)
I see..alot to learn.thanks.

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