Tyco ESFR-25 General Description

Model ESFR-25
25.2 K-factor Pendent Sprinkler
Early Suppression, Fast Response
General
Description
TYCO Model ESFR-25 Pendent Sprin-
klers are Early Suppression, Fast
Response (ESFR) sprinklers having a
nominal K-factor of 25.2 (Ref. 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.
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, refer to
Table A as well as 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 has been designed to operate at
substantially lower-end head pres-
IMPORTANT
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.
Page 1 of 4
sures, 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 possi-
bly reducing or eliminating the need for
a system fire pump.
Also, Model ESFR-25 Sprinklers
permit use of a maximum deflec-
tor-to-ceiling distance of 18 inches
(460 mm) versus 14 inches (356 mm).
Additionally, a storage arrangement of
40 ft. (12,2 m) with a ceiling height of
45 ft. (13,7 m) does not require in-rack
sprinklers as do other ESFR Sprin-
klers having nominal K-factors of
14.0 and 16.8.
The Model ESFR-25 Sprinklers are
listed by Underwriters Laborato-
ries (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
requirement for in-rack sprinklers.
Refer to the Specific Application Listing
(UL) for the design criteria.
Applications for the TYCO ESFR Sprin-
klers are expanding beyond currently
recognized installation standards. For
information on research fire tests (e.g.,
with flammable liquids and aerosols)
that may be acceptable to an author-
ity having jurisdiction, contact Tyco Fire
Protection Products (TFPP) Technical
Services.
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 (e.g., 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.
APRIL 2015
Worldwide
www.tyco-fire.com
Contacts
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.
Sprinkler
Identification
Number (SIN)
TY9226
TY9226 is a re-designation for Central
SIN 9226, Gem SIN G8441, and Star
SIN S8010.
TFP312