A Gas Safety Flame Failure Unit shuts off the supply of gas when the flame fails. Without this feature, the gas could build up in the system, causing harm and sickness. Even worse, it could be lethal if left undetected for an extended period. This is why it's critical to have a Flame Failure Unit in place.
A Gas Safety Flame Failure Unit will have a pilot and a burner, based on their respective specifications. The pilot is used to light the main burner. The pilot is a continuous burner, and the pilot flame burns throughout the duration of the main burner firing. The gas supply is regulated by the regulator.
The flame-failure unit must contain a safety shutoff valve that closes the fuel supply when the main burner fails. The shutoff valve must have a minimum opening time of 25 seconds, depending on the burner type. Other burner types include modulating burners, high-low burners, interrupted pilots, and atmospheric type burners.
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