Reliable N25 User manual

Reliable Automatic Sprinkler Co., Inc., 103 Fairview Park Drive, Elmsford, New York 10523
Bulletin 909 February 2020
Bulletin 909 February 2020
Model N25 (SIN RA0912)
K25.2 (360 metric)
Early Suppression
Fast Response Sprinkler
Product Description
The Reliable Model N25 Early Suppression Fast
Response (ESFR) Sprinkler is intended for use against
severe fire challenges. The sprinkler is designed to
respond quickly to a growing fire and deliver a heavy
discharge of water to suppress the fire. The Model N25
is FM Approved as a quick response storage sprinkler.
The Model N25 ESFR Sprinkler utilizes a levered
fusible alloy solder link in either a 165°F (74°C) or 212°F
(100°C) temperature rating. The sprinkler has a nominal
K Factor of 25.2 (metric 360), and is available with 1”
NPT or ISO 7-1R1 threads, or with the Victaulic® IGS™
Style V9 Sprinkler Coupling*.
The small deflector and frame provide a broad,
symmetrical, hemispherical pattern capable of
suppressing fires between sprinklers in high-piled
storage areas. At the same time, a high momentum
central core discharge penetrates and suppresses fires
occurring directly beneath the sprinkler in lower height
storage areas.
The N25 ESFR sprinkler is less susceptible to damage
due to the smaller deflector and frame design, and the
N25 ESFR has passed rough use and abuse testing
required for approval without the need for plastic
protectors.
Application and Installation
The Model N25 is an ESFR sprinkler intended for
installation in accordance with NFPA 13 and as a QR
Storage Sprinkler for use in accordance with FM Global
Loss Prevention Data Sheets. See Table B for further
design criteria information.
Listings and Approvals
1. FM Approved as a quick response storage sprinkler.
2. CNBOP-PIB Technical Approval.
Model N25 ESFR Sprinkler
Sprinkler Guard or Water Shield Listings and
Approvals
N25 ESFR
Pendent
Model S-5 Water Shield FM
Model 25 Guard FM
Optional Guards and Water Shields
Notes:
1. Guards and shields are approved for threaded
sprinklers only.
2. Water shield is listed for use only when the sprinkler
is installed within racks (IRAS) or under open grating (or
similar) areas as required by NFPA or FM standards.
3. Guard is listed for use only when the sprinkler is
installed within racks (IRAS).
*Note: Victaulic® and IGS™ are trademarks of Victaulic Company.

Technical Data:
Classification
Sprinkler
Temperature Link
Color
Frame
Color
Maximum Ceiling
Temperature
Sprinkler Identification
Number
(SIN)
°F °C °F °C
Ordinary
Intermediate
165
212
74
100
Black
White
Uncolored
White
100
150
38
66 RA0912
Material Data:
Frame Deflector Load Screw Lever Strut Link
Assembly Cap Washer Kick Spring
Brass Bronze Stainless
Steel
Stainless
Steel
Stainless
Steel
Beryllium Nickel,
Soldered Brass Beryllium Nickel
Stainless
Steel
2.
Fig. 1
Maintenance
The Model N25 ESFR Sprinkler should be inspected and
the sprinkler system maintained in accordance with NFPA
25. Do not clean sprinkler with soap and water, ammonia
or any other cleaning fluid. Remove any sprinkler that has
been painted (other than factory applied) or damaged in
any way. A stock of spare sprinklers should be maintained
to allow quick replacement of damaged or operated
sprinklers. Prior to installation, sprinklers should be
maintained in the original cartons and packaging until
used, to minimize the potential for damage to sprinklers
that would cause improper operation or non-operation.
Once operated, automatic sprinklers cannot be
reassembled and reused. New sprinklers of the same size,
type and temperature rating must be installed. A cabinet
of replacement sprinklers should be provided for this
purpose.
Model N25 ESFR Sprinkler Specification
Sprinklers shall be Early Suppression Fast Response
(ESFR) pendent suppression mode sprinklers specifically
tested and [FM Approved] for commodity storage
applications. Sprinkler frame and deflector to be of
bronze construction. Fusible link assembly shall utilize the
strut and lever principle of operation with approved fast
response black-painted or white-painted beryllium-nickel
thermal element. Water seal shall consist of a PTFE-
coated Bellville spring washer and brass cap assembly
containing no plastic parts. ESFR sprinklers shall have a
nominal K-factor of 25.2 with [1” NPT threaded] [ISO 7 1R1
threaded] [Victaulic® IGS™ grooved] end connections.
Sprinkler temperature rating shall be [Ordinary 165°F
(74°C)] [Intermediate 212°F (100°C)].
Installation
For threaded sprinklers, use only the Model W5
sprinkler wrench. Any other type of wrench may damage
the sprinkler. Sprinklers should be tightened between 22
- 30 ft-lbs (30- 41 Nm) torque. Sprinklers not tightened to
recommended torque or tightened past recommended
torque may cause leakage or impairment of the sprinkler.
Damaged sprinklers must be replaced immediately.
For grooved sprinklers, push the IGS™ Style V9
Sprinkler Coupling onto the grooved outlet until contact
with the center leg of the gasket occurs. Align the
sprinkler frame arms and the pads of the coupling with
the sprinkler piping and tighten the coupling until the
pads of the coupling meet. For additional information,
please reference Victaulic®technical bulletin I-V9.
Fig. 2 - Model W5 Wrench (for threaded sprinklers only)
Caution: When handling sprinklers, hold sprinklers only
by the frame arms and do not apply any force on the link
assembly.

ITEM DESCRIPTION
Sprinkler Identification Number (SIN) RA0912
K Factor us (Metric) 25.2 (360)
End Connection 1” NPT or ISO 7-1R1 threads, IGS™ Style V9 Sprinkler Coupling
Sprinkler Orientation Pendent
Maximum Working Pressure, PSI (bar) 175 PSI (12 bar)
Model N25 Technical Data Table A
3.
Shown with optional Model 25 Guard (ordered separately;
available for threaded sprinklers only)
Fig. 3
Fig. 4

Reliable Automatic Sprinkler Co., Inc.
[phone] Sales Offices
[phone] Sales Fax
[phone] Corporate Offices
www.reliablesprinkler.com Internet Address
Manufactured by
Recycled
Paper
Revision lines indicate updated or new data.
EG. Printed in U.S.A. 02/20 P/N 9999970454
The equipment presented in this bulletin is to be installed in accordance with the latest published Standards of the National Fire Protection Association, FM
Global, or other similar organizations and also with the provisions of governmental codes or ordinances whenever applicable.
Products manufactured and distributed by Reliable have been protecting life and property for more than 100 years.
Storage Type NFPA FM GLOBAL
Sprinkler Type ESFR Storage
Response Type ESFR QR
System Type Wet Wet
Temperature Rating F (C) 165, 212 (74, 100) 165, 212 (74, 100)
Roof Construction See NFPA 13 See FM Global 2-0
Ceiling Slope See NFPA 13 See FM Global 2-0
Maximum Coverage Area See NFPA 13 See FM Global 2-0
Minimum Coverage Area See NFPA 13 See FM Global 2-0
Maximum Spacing See NFPA 13 See FM Global 2-0
Minimum Spacing See NFPA 13 See FM Global 2-0
Minimum Clearance to Commodity See NFPA 13 See FM Global 2-0
Sprinkler Distance to Ceiling See NFPA 13 See FM Global 2-0
Open Frame, Single, Double,
Multiple Row, or Portable
Rack Storage of Class I - IV,
Cartoned Unexp Plastics
See NFPA 13 See FM 2-0 and 8-9
Solid Pile or Palletized
Storage of Class I - IV and
Cartoned Unexp Plastics
See NFPA 13 See FM 2-0 and 8-9
Idle Pallet Storage See NFPA 13 See FM 2-0,8-9 and 8-24
Rubber Tire Storage See NFPA 13 See FM 2-0 and 8-3
Rolled Paper Storage See NFPA 13 See FM 8-21
Flammable Liquid Storage See NFPA 30 See FM 7-29
Aerosol Storage See NFPA 30B See FM 7-31
Auto Components in Portable Racks N/A N/A
Model N25 Commodity Selection and Design Criteria Overview Table B
Ordering Information
Specify:
1. Model N25 ESFR
2. Temperature Rating
- 165F (74C)
- 212F (100C)
3. End Connection
- 1” NPT thread
- ISO 7 R-1 thread
- Victaulic® IGS™ Style V9 Sprinkler Coupling
Note: 1” S/142 Victaulic® IGS™
grooved welded outlets are also
available from Reliable.