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Fusible Link vs. Glass Bulb Sprinkler Heads — What are the Differences

There are two types of sprinkler heads: the Fusible Link and the Glass Bulb. Although both these fire sprinkler heads serve the same purpose and work almost similarly, there are still multiple points where these two differ.<br>

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Fusible Link vs. Glass Bulb Sprinkler Heads — What are the Differences

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  1. Millbrook Fire Protection www.millbrookfireprotection.com

  2. Fusible Link vs. Glass Bulb Sprinkler Heads — What are the Differences? • There are two types of sprinkler heads: the Fusible Link and the Glass Bulb. Although both these fire sprinkler heads serve the same purpose and work almost similarly, there are still multiple points where these two differ.

  3. Fusible Link Fire Sprinkler Head • A Fusible Link Sprinkler Head contains a heat-sensitive alloy covered with a two-part metal element — with a link holding the plug ready. • When the temperature of the surrounding rises to a preset degree, the alloys melt releasing the metal elements to separate and freeing the pip cap to dispense water (that is already pre-filled in the pipes).

  4. Glass Bulb Fire Sprinkler Head • A Glass Bulb Fire Sprinkler Head consists of a metal frame incorporating a glass container filled with a heat-sensitive liquid that holds the pip cap in place and ready to dispense. • When the temperature of the surrounding rises to the sensitivity extent of the liquid, the glass bulb explodes — releasing the pip cap and dispersing the water to the heat-affected area.

  5. Differences between the Two Types of Fire Sprinklers Heads: • • Sealing Assembly: Sealing Assembly or as termed as “Plug” is the cap that is held firm by a heat-sensitive element in the fire sprinkler head. In the case of a fusible link sprinkler head   • • Heat Sensitive Element: The wet sprinkler systems have one thing in common — a heat-sensitive element that acts as a plug (as explained above). These heat-sensitive elements are different in both the sprinkler heads. • • Deflectors: Deflectors are the plates installed at the opening of the water flow. These are supposed to direct the flow of the water in the desired pattern, direction and speed. • • Frame: A frame is the metal body of a fire sprinkler head that holds everything together. The fusible link sprinkler head has a two-part metal body. 

  6. Millbrook Fire Protection • Mill Brook Fire Protection was founded as a family owned and operated fire sprinkler company that provides the best in fire protection services throughout New York. • info@millbrookfireprotection.com • www.millbrookfireprotection.com • (631) 254-1315

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