General
Description
TYCO Model ESFR-25 Pendent Sprinklers
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 primarily
used for ceiling-only sprinkler
protection of (but not limited to) the following
storage applications:
• most encapsulated or non-encapsulated
common materials including
cartoned, unexpanded plastics
• uncartoned (exposed) expanded
plastics in accordance with NFPA 13
and FM Global standards
• some storage arrangements of rubber
tires, roll paper, flammable liquids,
aerosols, and automotive
components
For more specific criteria, refer to
Table A as well as the applicable design
standard.
The Model ESFR-25 Pendent Sprinklers
provide the system designer
with hydraulic and sprinkler placement
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 Sprinkler
has been designed to operate at
substantially lower-end head pres-
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 possibly
reducing or eliminating the need for
a system fire pump.
Also, Model ESFR-25 Sprinklers
permit use of a maximum deflector-
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 Sprinklers
having nominal K-factors of
14.0 and 16.8.
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
requirement for in-rack sprinklers.
Refer to the Specific Application Listing
(UL) for the design criteria.
Applications for the TYCO ESFR Sprinklers
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 authority
having jurisdiction, contact Tyco Fire
Protection Products (TFPP) Technical
Services.
Technical
Data
Approvals
UL and C-UL Listed
FM Approved
VdS Approved
NYC Approved under MEA 356-01-E
LPCB Certified (Cert. Nos. 094b
and 007l)
CE Certified (Certificate of Conformity 1725-CPD-H0010)
Maximum Working Pressure
175 psi (12,1 bar)
Pipe Thread Connections
1 Inch NPT or ISO 7-R 1
Discharge Coefficient
K=25.2 gpm/psi1/2 (362,9 lpm/bar1/2)
Temperature Ratings
165°F (74°C) and 212°F (100°C)
Finish
Natural Brass
Physical Characteristics
Frame . . . . . . . . . . . . . . . . . . . . . . Brass
Deflector . . . . . . . . . . . . . . . . . . . . Bronze
Compression Screw . . . . . . . . . . Stainless Steel
Hook . . . . . . . . . . . . . . . . . . . . . . . MONEL
Strut . . . . . . . . . . . . . . . . . . . . . . . MONEL
Link Assembly . . . . . . . . . . . . . . . Solder, Nickel
Button . . . . . . . . . . . . . . . . . . . . . . Brass
Sealing Assembly . . . . . . . . . . . . Beryllium Nickel w/TEFLON
Ejection Spring . . . . . . . . . . . . . . INCONEL
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