Transcription of Gas Valve Failure Analysis* - ROBERTS ENGINEERING
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Gas Valve Failure Analysis* - ROBERTS ENGINEERING
Gas Valve Failure Analysis*. By Charles C. ROBERTS , Jr., , *. Reprinted from Claims Magazine . Gas valves are installed in many appliances such as dryers, water heaters, furnaces, and in- dustrial machinery. The purpose of the gas Valve is to reduce the gas line pressure to a level required by the using appliance. The gas Valve also acts as a safety device to shut off the gas automatically in case of flame Failure . Modern gas valves incorporate pressure regula- tion for reliable burner operation. A diaphragm connected to a Valve controls gas flow and pressure. A thermocouple senses heat from a pilot flame and generates a current that holds Figure 2. open a solenoid Valve . If the flame near the thermocouple is extinguished, the current from Valve seats allowing gas flow when the heater the thermocouple stops and the solenoid Valve was in the off position.
http://www.croberts.com Figure 4 PRODUCT DEFICIENCY Figure 4 is a view of a home that sustained an explosion in the basement. The arrow points to
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