RELIABLE
Model N25 (SIN RA0912)
Early Suppression
Fast Response Sprinkler
Product Description
The Reliable Model N25 Early
Suppression Fast Response Sprinkler (ESFR/Quick Response Storage Sprinkler) is
intended for use against severe fire challenges.
This sprinkler is designed to respond
quickly to growing fires and will deliver a heavy water discharge to “suppress”
rather than “control.”
Note: The Model N25 ESFR sprinkler utilizes
a levered fusible alloy solder link in either a 165°F (74°C) or a 212°F (100°C)
rating. FM Global considers this a “Quick Response” storage sprinkler for use
per FM Data Sheet 8-9.
The sprinkler has a Nominal K Factor
of 25.2 (metric 362) and will deliver approximately 98 gpm (371 L/min) of water
at 15 psi (1 bar).
The smaller deflector and frame
provide a broad, very symmetrical, hemispherical pattern capable of suppressing
fires between sprinklers in high storage height areas and at the same time
retaining a high momentum central core to penetrate and suppress fires
occurring directly beneath the sprinkler in low storage height areas.
The N25 ESFR sprinkler is also less
susceptible to damage due to smaller deflector and frame design. The lighter
N25 ESFR passed rough use and abuse test in the labs without plastic
protectors.
Application and Installation
The Model N25 is an ESFR sprinkler is
intended for installation in accordance with NFPA 13 and is a QR Storage
Sprinkler for use in all FM Loss Prevention Data Sheets as well as approval of
the Authority Having Jurisdiction.
The Model N25 ESFR sprinkler is
designed for ceiling only sprinkler system with no in-rack sprinklers required.
Protection of (but not limited to)
most encapsulated or non-encapsulated (including cartoned unexpanded) plastics.
Model N25 ESFR is also use for protection of cartoned exposed expanded plastics
as well as some storage arrangements of rubber tires, rolled paper, and aerosols.
Design Criteria
General guidelines:
- Sprinkler Position: Pendent, align frame arms with the pipe. Deflectors should be parallel with the ceiling or roof.
- System Type: Wet Pipe Systems Only
- Maximum area of coverage: 100 ft2 (9.3m2), greater coverage area are allowable in some cases.
- Minimum area of coverage: 64 ft2 (5.8m2)
- Maximum slope ceiling: 2/12 pitch (9.5°)
- Maximum spacing: 12 ft (3.7m) for building heights up to 30 ft (9.1m) and 10 feet (3.1m) for building heights greater than 30 ft (9.1m)
- Minimum spacing: 8 feet (2.4m)
- Deflector distance from walls: At least 4 inches (102mm) from walls, and no more than one-half the allowable distance permitted between sprinklers.
- Deflector to Top of Storage: at least 36 in (914mm).
- Deflector to ceiling Distance: 6 - 18 in (152 - 457mm).
- Center Line of Thermal Sensing Element To Ceiling Distance: 4 - 17 in (101.6 - 425mm).
Listings and Approvals
FM Approved as a quick response
storage sprinkler.
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