The south side of Worcester, MA used to have the same problem. At
night, the pressures could surge over 225 psi and periodically trip
dry valves. I believe one company installed something on their
incoming water line to abate this, but I'm not sure what. I think it
was something designed to absorb water hammer. I'll see if I can find
out. Can you have the water company put a pressure recorder on the
hydrant for a couple of days to see what is going on?
At 07:25 AM 5/15/2008, you wrote:
I don't have a lot of information, but they indicate that the street
pressure has been above 250 as recorded by their fire alarm system.
Don't know if it is a spike or how long it lasts. Thanks for the
responses. I will have to get more information.
Pete
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Tom
Duross
Sent: Wednesday, May 14, 2008 7:12 PM
To: [email protected]
Subject: RE: Pressure Regulating Valve
The data is a little loose but you could be looking at a PRV, a relief
or a
tank, or combinations of those.
What's really happening?
Tom
Wouldn't this problem be solved by installing a pressure relief valve
like
we use for gridded systems? Is there anti-freeze in these systems?
Backflow preventer and no expansion chamber?
Garth
I have a facility in North Carolina who is having pressure fluctuations
in the water supply such that their CPVC systems are bursting due to
overpressures. They have recorded pressures that easily exceed the
175lb limits of the systems.
What would the recommendations of the forum be to keep the pressures
down to a reasonable level? (Pressure regulating valve?)
Will any hydraulics analysis be necessary when any device is installed
in the system?
Anyone in North Carolina want to contact me concerning this work?
Thanks in advance.
Pete Larrimer
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Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, Connecticut
www.fpdc.com
860.535.2080
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