• Datasheet

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 74°C or a 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.

Design Criteria

Sprinkler Position: Pendent, align frame arms with the pipe. Deflectors should be parallel with the ceiling or roof
System Type: Wet Pipe Systems Only
Max. area of coverage: 9,3m², greater coverage area are allowable in some cases
Min. area of coverage: 5,8m²
Max. slope celling: 9,5°
Max. spacing: 3,7m ( for building heights up to 9,1m), 3,1m ( for building heights greater than 9.1m)
Min. spacing: 2,4m
Deflector distance from wall: At least 102mm from walls, and no more than one-half the allowable distance permitted between sprinklers
Deflector to Top of Storage: Min. 914mm
Deflector to ceiling Distance: 152-457mm
Center Line of Thermal Sensing Element To Ceiling Distance: 102-425mm

Listings and Approvals

1. FM Approved as a quick response storage sprinkler