What is Gas flameout protection?

Gas flameout protection is a safety feature that is designed to prevent the accidental shutdown of the gas flame in gas-fired appliances, such as boilers, furnaces, and water heaters. The main function of this feature is to detect the absence of a flame and shut off the gas supply to the appliance to prevent a gas leak or explosion.

There are several methods used for gas flameout protection, including:

1.Thermocouple: A thermocouple is a temperature sensor that is placed in the flame. It generates a small electrical current when it is heated by the flame. If the flame goes out, the current stops and the gas supply is shut off.

2.Ultraviolet (UV) sensor: A UV sensor is placed near the flame and detects the presence of ultraviolet radiation, which is emitted by the flame. If the flame goes out, the sensor sends a signal to shut off the gas supply.

3.Flame rod: A flame rod is a metal rod that is placed in the flame. It generates an electrical current when it is heated by the flame. If the flame goes out, the current stops and the gas supply is shut off.

4.Infrared sensor: An infrared sensor detects the presence of heat, which is emitted by the flame. If the flame goes out, the sensor sends a signal to shut off the gas supply.

Gas flameout protection is an important safety feature that helps to prevent gas leaks and explosions by shutting off the gas supply when the flame goes out. It is a mandatory feature for gas-fired appliances and is typically required by most building codes and safety regulations.