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The Lowe process is a three-stage modified water gas process in which 'blue' water gas is modified by addition of pyrolized oils to render a yellow flame usable for domestic lighting as well as heating. Blue water gas is a term used for water gas produced from clean-burning fuels such as anthracite, coke and charcoal and produces a blue flame.
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]
Thermal cut-off valve (TV), which: prevents excessive temperatures. closes automatically at a certain temperature and cuts off the gas flow long before the ignition temperature of the gas mixture is reached. and a pressure-sensitive gas cut-off valve (PV), which stops the gas flow in the event of pressure shocks
A safety shutoff valve should be fail-safe, that is close upon failure of any element of the input control system (such as temperature controllers, steam pressure controllers), air pressure, fuel pressure, current from a flame detector, or current from other safety devices such as low water cutoff, and high pressure cutoff. A blowdown valve ...
Valves can be categorized into the following types, based on their operating mechanism: Ball valve, for on–off control without pressure drop. Ideal for quick shut-off, since a 90° turn completely shuts off, compared to multiple 360° turns for other manual valves; Butterfly valve, for on–off flow control in large diameter pipes
The Union Army Balloon Corps was a branch of the Union Army during the American Civil War, established by presidential appointee Thaddeus S. C. Lowe.It was organized as a civilian operation, which employed a group of prominent American aeronauts and seven specially built, gas-filled balloons to perform aerial reconnaissance on the Confederate States Army.
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