An automatic fire sprinkler is basically a valve activated by heat. It’s main component is a small glass bulb which holds a heat-sensitive liquid. They are colour coded and each colour represents the temperature at which it will explode, releasing the water flow.
When the temperature reaches a specific level, the liquid inside will expand, causing the glass to break.
Because some industrial environments operate at temperatures higher than normal, it’s necessary that some fire sprinkler heads are capable of resisting higher temperatures before exploding.
