Thanks.
Regards,
Stuart Hope
Director
PROTECH DESIGN LIMITED
Specialist Fire Protection Designers
Phone:09 298 4877 Mobile:0274 896 999 Email:stu...@protechdesign.co.nz
Web:www.protechdesign.co.nz
Address:50 Gatland Road, Papakura 2113, Auckland, NZ Postal:PO Box 72920,
Papakura 2244, Auckla
NFPA 13 clause 8.7.4.1.1.2 permits Horizontal sidewall sprinklers to be 18in
(457mm) below a non-combustible ceiling where listed for such use.
- does anyone know of a sprinkler listed for this distance?
Thanks in advance for your help
Kind regards
Nicky Marshall
Branch Manager (Blenheim)
Pr
Some UL/FM playpipes are listed with and without the tips. I used to have a
listed " test nozzle also.
"For I am not ashamed of the gospel , , because it is God’s power for salvation
to everyone who believes..." HCS Romans 1:16
On Oct 2, 2012, at 6:14 PM, "Tom Duross" wrote:
> This message c
Brad, we measure rpm as a means of adjusting pressures to rated speed. These
pumps are magic and speed is not supposed to change. Pump affinity. Also,
when you have more than one pipe size difference between discharge and suction,
you should adjust for velocity pressure (or read discharge aft
It was the thirty minute run once a week from an engine that was the
concern.
-Original Message-
From: sprinklerforum-boun...@firesprinkler.org
[mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of Dave Phelan
Sent: Tuesday, October 02, 2012 2:27 PM
To: sprinklerforum@firesprinkle
I would never put full pump pressure on a header that's normally empty or
use hose gates to modulate either. Always modulate with the OS&Y or BV,
keep the pump pressure in the system, who cares if you have 2) 18's, a 19
and a 17? Playpipes are only listed with the tips on (1-1/8") which is why
we
I'm grasping the idea of wanting to prevention the transmission of vibration
and such when the pump is mounted above an occupied floor, particularly in a
residential building, although I'm thinking there isn't a catcher's mitt big
enough for the pieces which will be bouncing off the IBC required FR
You can, not supposed to, but you can.
I have never been able to get the same reading at each without using the
valves on the header. Each hose is going to lose differently regardless of
length. So you must always adjust the valves to get "equal" readings. (Equal
being relative to the bouncing of
You can't open an OS&Y part way? I did say the same set up. So if you have 4
playpipes at the same elevation connected each with 50' of hose you are good.
I suppose of you put a 90 deg kink in one of the hoses you no longer have the
same setup. Throw in one shorter or longer hose and you no
rida Statute Chapter 119, and may be subject to
disclosure.
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". If you have the same setup on each valve and playpipe you can open all the
2.5" valves first with no flow and throttle with the manifold valve as all the
playpipes should be the same. "
Unless your manifold valve is non-throttling (OS&Y). Even then, isn't each hose
lay different?
R/
Matt
Of course, the one question that hasn't been asked is "Why?" Normally,
mechanical equipment is placed on isolators to reduce noise and vibration. Why?
Because the equipment runs periodically or often during the day and can be
disruptive to the building occupants if noise is not abated. How ofte
"At 0 flow, the pressure should not be more than 120% rated..." While churn
pressure not exceeding 120% of pump rating may be preferable for the specific
application, NFPA 20 (2010) Sections 6.2.1, 7.1.2.2, as well as Figure A.6.2,
allow churn pressure to 140% of rated head for any type of pump
One clarification. You can't take your final pressure pitot readings until you
have all the valves/playpipes open. As you open subsequent ones the prior
ones drop a bit. Your best bet is BEFORE you do the test know what pitot you
want from each playpipe and how many valves you want open. Ope
Gerzayn,
It is OK to do more, but the minimum required is to read/record (4) things at
(3) flow rates. The (3) flow rates are 0, rated, and 150% rated. The (4) things
are:
1. The difference between suction pressure and discharge pressure
2. RPM
3. Volts
4. Amps
The following is FYI for sprinkler
Not sure currently. I did run into the pump rep quite a few years later who
argued against it at the time but he told me the pad settled down onto the
floor. I haven't seen it in years myself. I'll ask around.
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From: sprinklerforum-boun...@firesprinkler.org
[mailto:spr
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