Storage sprinkler ESFR-25 series

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 B 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 pressures, 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 in. (460 mm) versus 14 in. (356 mm).