Control valve
Control valve
(OP)
First, I want to apologies for my English, it's obviously not my first language.
Here's my problem... I think I saw something about that in NFPA 13, but I search and I didn't find...
If I'm correct, the control valve (controling for exemple the water motor gong) should be after the pressure switch in such a way that the pressure switch shan't be isolated...
The matter is that I can't find this article in NFPA 13... Could someone help me, please....
Here's my problem... I think I saw something about that in NFPA 13, but I search and I didn't find...
If I'm correct, the control valve (controling for exemple the water motor gong) should be after the pressure switch in such a way that the pressure switch shan't be isolated...
The matter is that I can't find this article in NFPA 13... Could someone help me, please....





RE: Control valve
normally there is a main contol valve for the system
there should be no shut off valves going to a high pressure switch for a dry pipe system
yes the line to a water motor gong can have a shut off see 8.17.1.4.1 nfpa 13 2010 edition
if you want to restate your question please do.
RE: Control valve
cdafd beat me to the code reference. In the 2013 edition of NFPA 13, 8.17.1.4.1 reads the same thing - "Where a control valve is installed in the connection to pressure type-contactors or water motor-operated alarm devices, it shall be of the indicating type."
8.17.1.4.2 states "Such valves shall be sealed, locked, or electrically supervised in the open position."
R M Arsenault Engineering Inc.
www.rmae.ca
RE: Control valve
1 - You are referring to a wet pipe system
2 - You are employing the use of a water motor gong
3 - You are additionally using a flow switch on the riser pipe or a pressure type flow switch on the alarm check valve trim
If these are correct, your control valve would be on the supply side of the alarm check valve. There may be a tamper switch on the control valve that would send an alarm if the valve is closed.
I hope this answers your questions, but I am not sure if I understood it properly. Feel free to email me direct with diagrams if you need more assistance.
Travis Mack
MFP Design, LLC
www.mfpdesign.com
https://www.facebook.com/pages/MFP-Design-LLC/9221...
RE: Control valve
R M Arsenault Engineering Inc.
www.rmae.ca
RE: Control valve
However, I thank you all... Charles