Fire Sprinkler Bulb Temperatures

Automatic Fire Sprinkler System Bulb Operating Temperature Rating

An Automatic Fire Sprinkler is a valve used to control the flow of water. It operates as a valve by allowing the flow of water contained in a fire sprinkler system when the heat sensitive element (glass bulb or fusible link) is operated. This is caused when the fire sprinkler is exposed for a sufficient time to a temperature at or above the temperature rating of the heat sensitive element.

The fusible link of an automatic fire sprinklers typically are colour coded to illustrate their predetermined operating temperature.

This illustration show the common temperature ratings for fire sprinklers.

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