CENTRAL ULTRA K-25 ESFR Manual

C:ENTR
ULTRA™ K-25™ 1-99
ULTRA™ K-25™ ESFR
Lo\N Pressure
Early Suppression Fast Response
Manufactured by: Central Sprinkler Company
451 North Cannon Avenue, Lansdale. Pennsylvania 19446
Product
Description
The Central ULTRA™ K-25,.,, Early
Suppression Fast Response (ESFR)
Automatic Sprinkler has been de-
signed to meet high challenge fire
hazards while eliminating the high
pressure requirements of K-
i
4 ESFR's
and the need for in-rack sprinklers.
The Model UL TRA'"K-25n' uses a
larger orifice than other ESFR sprink-
lers which allows the reduction of the
required pressure The pressure re-
quired varies by building and storage
height. Refer to the required pressure
chart for specific requirements.
The ULTRA™ K-25™ has several ad-
vantages over 14 K-Factor ESFR's.
The main advantage Is in the lower
required pressure. This reduction, up
to 60% in some cases, can have a
dramatic effect on the sprinkler system.
It can eliminate the need for a pump
and all of the associated pump ex-
pense, such as additional electrical
service to the building. The maximum
deflector distance Is 18"
(457 2 mm)
compared to 14"
(355.6 mm)
as is the
case for 14 K-factor ESFA's, and the
reduction in pressure can make instal-
lation more cost effective with smaller
easier to install pipe. Another main
advantage is that the UL TAN"' K-2S™
is for buildings up to 45'-0"(13. 7
m)
high
with 40'-0"r12.2 mJ of storage without
the need for in-rack sprinklers. 14
K-Factor ESFA's require in-rack sprin-
klers discharging at 50 psi in this situa-
tion. Eliminating in-rack sprinklers in
situations where 14 K-Factor ESFA's
can not, shows the outstanding perfor-
mance of the ULTRA"• K-25"''
The Model ULTRA',..K-25™ utilizes a
160°F/ 71°C or a 200°F/ 93°C Fast
Response element, giving the sprinkler
the required fast response characteris-
tics. The fast response, combined
with water droplet size and velocity
provide early suppression to high
challenge fires.
Operation:
The ULTRA™ K-25™ uti-
lizes a heat sensitive three fin operat-
ing element. It does not use an o-ring
in any part of the design. The element
operates when heat Is absorbed by
the heat fins and conducted to the
alloy pellet. At the rated temperature
the alloy pellet melts, causing the ball
plunger to drop, freeing balls from the
retaining groove. This releases the
heat fin/ washer assembly and allows
the arms to eject and the water to
flow from the open orifice.
- ATTENTION -
ULTRA™ K-25™ ESFR'S
have a 1"
(25 mm)
thread. Be sure to list/
order the correct outlet
on the branchline.
Early
Suppression
Fast
Response
Automatic
Sprinkler
~
Technical
ill~
Data
Model: UL TAN .. K-25r"
Style: Pendent
Orifice Size: .930
(23.6 mm)
K-Factor: 25.2
(360.5 metric)
Thread Size: 1" N.P.T
(25 mm)
Temperature Rating: 160°F/ 71 °c
200°F/ 93°C
Sensitivity: Quick Response
Approvals: FM
Maximum Working Pressure:
175 psi
(12.1 bar)
Factory Hydro Test:100% at
500 psi
(34.5 bar)
Standard Finish: Brass
Length: 4 1/a''
(105 mm)
Width: 2
13 /,5"
(71 .4
mm)
Weight: 11 oz.
(313 g)
Patents: Patents are pending.
No. 3•1.0