Tyco ESFR-22 Manual

Model ESFR-25
25.2 K-factor Pendent Sprinkler
Early Suppression, Fast Response
IMPORTANT
Refer to Technical Data Sheet
TFP2300 for warnings pertaining to
regulatory and health information.
Always refer to Technical Data
Sheet TFP700 for the "INSTALLER
WARNING" that provides cautions
with respect to handling and instal-
lation of sprinkler systems and com-
ponents. Improper handling and
Installation can permanently damage
a sprinkler system or its compo-
nents and cause the sprinkler to fail
to operate in a fire situation or cause
it to operate prematurely.
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up-to-date electronic version of this
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General
Description
The TYCO Model ESFR-25 Pendent
Sprinklers are Early Suppression, Fast
Response (ESFR) sprinklers with a
nominal K-factor of 25.2. The sprinkler
assembly is shown in Figure 1. They are
suppression-mode sprinklers that are
especially advantageous as a means of
eliminating the use of in-rack sprinklers
when protecting high-piled storage.
Page 1 of 6
The Model ESFR-25 Sprinklers are pri-
marily used for ceiling-only sprinkler
protection of, but not limited to, the fol-
lowing storage applications:
• Most encapsulated or non-encap-
sulated common materials including
cartoned, unexpanded plastics
• Uncartoned (exposed) expanded
plastics in accordance with NFPA 13
and FM Global standards
• Some storage arrangements of rub-
ber tires, roll paper, flammable liq-
uids, aerosols, and automotive
components
For more specific criteria, see Table B
and the applicable design standard.
The Model ESFR-25 Pendent Sprin-
klers provide the system designer
with hydraulic and sprinkler place-
ment options not presently available to
the traditional ESFR sprinklers having
nominal K-factors of 14.0 and 16.8. In
particular, the Model ESFR-25 Sprin-
kler is designed to operate at substan-
tially lower-end head pressures, as
compared to ESFR Sprinklers having
nominal K-factors of 14.0 and 16.8.
This feature offers flexibility when
sizing system piping, as well as pos-
sibly reducing or eliminating the need
for a system fire pump.
The Model ESFR-25 Sprinklers can
eliminate the use of in-rack sprinklers
when protecting high-piled storage of
specific materials up to the following
heights:
• NFPA: 40 ft (12,2 m) with ceilings up
to 45 ft (13,7m)
• FM: 45 ft (13,7 m) with ceilings up to
50 ft (15,2 m)
For more specific criteria, see Table B
and the applicable design standard.
The Model ESFR-25 Sprinklers are
listed by Underwriters Laboratories
(UL) for specific applications with
a maximum storage height of 43 ft
(13,1 m) with a maximum ceiling height
of 48 ft (14,6 m) without the require-
ment for in-rack sprinklers. Refer to the
Specific Application Listing (Ul) for the

design criteria.

DECEMBER 2022
Worldwide
www.tyco-fire.com
Contacts
NOTICE
The Model ESFR-25 Sprinklers
described herein must be installed
and maintained in compliance with this
document, as well as with the applica-
ble standards of the National Fire Pro-
tection Association (NFPA), in addition
to the standards of any authorities
having jurisdiction, such as FM Global.
Failure to do so may impair the perfor-
mance of these devices.
The owner is responsible for main-
taining their fire protection system
and devices in proper operating con-
dition. Contact the installing contrac-
tor or product manufacturer with any
questions.
In all cases, the appropriate NFPA or
FM Global installation standard, or
other applicable standard, must be
referenced to ensure applicability and
to obtain complete installation guide-
lines. The general guidelines in this
data sheet are not intended to provide
complete installation criteria.
TFP312