All wet-pipe fire sprinkler systems are held closed by either a fusible link, or a glass bulb that contains a heat-sensitive liquid.
A fusible link fire sprinkler head has a two-part metal element that is fused by a heat-sensitive alloy. The link holds the pip cap, or plug, in place. Once the room temperature around the sprinkler head reaches a certain temperature, the alloy melts, and the metal elements separate, which causes the pip cap to fall away. Water is then released. Note that only in the areas where the ambient temperature reaches a specified level, will the water be released, therefore, water is only released in the area of a fire, which helps limit water damage.
Glass bulb sprinkler heads have a small glass reservoir that holds a heat-sensitive liquid. This glass bulb holds the pip cap in place. When the room temperature of the liquid reaches a certain level, the liquid expands causing the glass bulb to break, which allows the pip cap to fall away releasing water. As with the fusible link heads, water is only released where the ambient temperature reaches a certain level, which helps limit water damage.
In both cases, the sprinkler heads are designed to release water only when the specified room temperature has been reached. Because residential and industrial environments operate at different temperatures, it’s necessary that some fire sprinkler heads are capable of resisting higher temperatures before exploding. Here you can read more about Why are Fire Sprinkler Heads color coded.
TYCO ESFR-14 Pendent Sprinklers Early Suppression, Fast Response, 14.0 K-factor, 3/4' NPT, UL/FM, USA (TY6236) ESFR-14 TYCO SPK PD 3/4' K14.0, 68C รายละเอียดทั้งหมด. Model ESFR-14 (TY6236) K=14.0 Pendent Sprinkler System Type Wet Pipe Roof Construction Unobstructed or obstructed con-struction (e.g., smooth ceiling, bar joists, beam and girder, and so. TYCO Model ESFR-14, 14.0 K-factor, Pendent Sprinklers (TY6236) are Early Suppression, Fast Response (ESFR) sprinklers having a nominal K-factor of 14.0. 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.