my Motorola ATRIXT 4G on ATT
-Original message-
From: bcasterl...@fsc-inc.com
To: sprinklerforum@firesprinkler.org
Sent: Sun, Jun 3, 2012 20:31:30 GMT+00:00
Subject: minimum 7 PSI end head logic, check please!
Fact: a minimum pressure is required to 'push the stopper out
-
From: Brad Casterline [mailto:bcasterl...@fsc-inc.com]
Sent: Monday, June 04, 2012 06:57 AM
To: sprinklerforum@firesprinkler.org sprinklerforum@firesprinkler.org
Subject: RE: minimum 7 PSI end head logic, check please!
Good points guys, thanks. Here is an 'equivalency thought experiment
To: sprinklerforum@firesprinkler.org
Subject: Re: minimum 7 PSI end head logic, check please!
Research the development history of the Residential sprinkler. It was done
during the late 70's and covered all the issues you're thinking about here.
I believe NFPA 13D was first published in 1980
Message-
From: sprinklerforum-boun...@firesprinkler.org
[mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of Brad Casterline
Sent: Monday, June 04, 2012 7:49 AM
To: sprinklerforum@firesprinkler.org
Subject: RE: minimum 7 PSI end head logic, check please!
Thanks Mark,
I would not want
@firesprinkler.org
Subject: RE: minimum 7 PSI end head logic, check please!
Thanks Mark,
I would not want to reduce LH spacing. I think density should be tied to
sprinkler height and area to occupancy. I think the water demands are too
high for low ceilings and too low for high ceilings. Basing min flow rate
-5556 Cell
-Original Message-
From: sprinklerforum-boun...@firesprinkler.org
[mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of Brad
Casterline
Sent: Monday, June 04, 2012 7:49 AM
To: sprinklerforum@firesprinkler.org
Subject: RE: minimum 7 PSI end head logic, check please
I don't like it Bill, due to the embarrassment that occurs between 19 and 21
feet :)
-Original Message-
From: Bill Brooks [mailto:bill.bro...@brooksfpe.com]
Sent: Monday, June 04, 2012 8:04 AM
To: sprinklerforum@firesprinkler.org
Subject: RE: minimum 7 PSI end head logic, check please
Fact: a minimum pressure is required to 'push the stopper out of the
orifice' once the 'link has broken'. This means the column of water
above the head has to be at least 16 feet tall. (i wonder if this is
enough for the 'bigger stoppers' of today, but I'll trust the
manufacturers). An
:00
Subject: minimum 7 PSI end head logic, check please!
Fact: a minimum pressure is required to 'push the stopper out of the orifice'
once the 'link has broken'. This means the column of water above the head has
to be at least 16 feet tall. (i wonder if this is enough for the 'bigger
stoppers
My understanding of this is that the minimum pressure is based on the fact
that the UL/FM tests are done with the lowest starting pressure being 7psi
and has nothing to do with a stopper. The only modern heads I know of
with a stopper were the Central designed heads that had an O-ring in the
-Original message-
From: bcasterl...@fsc-inc.com
To: sprinklerforum@firesprinkler.org
Sent: Sun, Jun 3, 2012 20:31:30 GMT+00:00
Subject: minimum 7 PSI end head logic, check please!
Fact: a minimum pressure is required to 'push the stopper out of the
orifice' once the 'link has
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