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2. Pilot light - Wikipedia

   en.wikipedia.org/wiki/Pilot_light

   In natural gas furnaces, water heaters, and room heating systems, a safety cut-off switch is normally included so that the gas supply to the pilot and heating system is shut off by an electrically operated valve if the pilot light goes out. This cut-off switch usually detects the pilot light in one of several ways: A flame rectification device. [2]

3. Stoplogs - Wikipedia

   en.wikipedia.org/wiki/Stoplogs

   Stoplogs are typically used in structures where the removal, installation, and replacement of the logs is expected infrequently. When larger flows of water are passing through a stoplog gate, it can be difficult to remove or place individuals logs. Larger logs often require multiple people to position and lift the logs.

4. List of abbreviations in oil and gas exploration and production

   en.wikipedia.org/wiki/List_of_abbreviations_in...

   BHA – bottom hole assembly (toolstring on coiled tubing or drill pipe) BHC – BHC gamma ray log [clarification needed] BHCA – BHC acoustic log [clarification needed] BHCS – BHC sonic log [clarification needed] BHCT – bottomhole circulating temperature; BHKA – bottomhole kickoff assembly; BHL – borehole log; BHP – bottom hole pressure

5. AOL

   search.aol.com

   The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.

6. Industrial furnace - Wikipedia

   en.wikipedia.org/wiki/Industrial_furnace

   A furnace can be lit by a small pilot flame or in some older models, by hand. Most pilot flames nowadays are lit by an ignition transformer (much like a car's spark plugs). The pilot flame in turn lights up the main flame. The pilot flame uses natural gas while the main flame can use both diesel and natural gas. When using liquid fuels, an ...

7. Flame supervision device - Wikipedia

   en.wikipedia.org/wiki/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 or the room. [1]