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Flame supervision device. For gas appliances, a flame supervision device (FSD) – alternative name: flame failure device (FFD) – is a general term for any device designed to stop flammable gas going to the burner of a gas appliance if the flame is extinguished. This is to prevent a dangerous buildup of gas within the appliance, its chimney ...
As illustrated in the use of the thermostat above, all of the power for the control system is provided by a thermopile which is a combination of many stacked thermocouples, heated by the pilot light. The thermopile produces sufficient electrical power to drive a low-power gas valve, which under control of one or more thermostat switches, in ...
Gas stoves today use two basic types of ignition sources, standing pilot and electric. [21] A stove with a standing pilot has a small, continuously burning gas flame (called a pilot light) under the cooktop. [21] The flame is between the front and back burners. When the stove is turned on, this flame lights the gas flowing out of the burners.
So long as the pilot flame remains lit, the thermocouple remains hot, and the pilot gas valve is held open. If the pilot light goes out, the thermocouple temperature falls, causing the voltage across the thermocouple to drop and the valve to close. Where the probe may be easily placed above the flame, a rectifying sensor may often be used ...
Gas lighting. Gas lighting in the historical center of Wrocław, Poland, is manually turned off and on daily. Gas lighting is the production of artificial light from combustion of a fuel gas such as methane, propane, butane, acetylene, ethylene, hydrogen, carbon monoxide, coal gas (town gas) or natural gas. The light is produced either directly ...
Flame of a gas and oil, in a dual burner. A gas burner is a device that produces a non-controlled flame by mixing a fuel gas such as acetylene, natural gas, or propane with an oxidizer such as the ambient air or supplied oxygen, and allowing for ignition and combustion. The flame is generally used for the heat, infrared radiation, or visible ...
A fireplace insert is a device that can be inserted into an existing masonry or prefabricated wood fireplace. Most fireplace inserts are made from cast iron or steel. Fresh air enters through vents below, circulates around the main chamber (where it heats up), then exits through the chimney. Fireplace inserts have insulated glass doors that ...
A fume hood (sometimes called a fume cupboard or fume closet) is a type of local exhaust ventilation device that is designed to prevent users from being exposed to hazardous fumes, vapors and dusts. The device is an enclosure with a movable sash window on one side that traps and exhausts gases and particulates either out of the area (through a ...