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An air release valve on an elevated section of a large diameter lavender-colored pipe. A working system should not generate further trapped gas. Air may be drawn in if there is a small leak, or dissolved air in make-up water may come out of solution, but this generally indicates a system leak if new water is needing to be added.
The nozzle and flapper mechanism is a displacement type detector which converts mechanical movement into a pressure signal by covering the opening of a nozzle with a flat plate called the flapper. [1] This restricts fluid flow through the nozzle and generates a pressure signal.
A flue is a duct, pipe, or opening in a chimney for conveying exhaust gases from a fireplace, furnace, water heater, boiler, or generator to the outdoors. Historically the term flue meant the chimney itself. [1] In the United States, they are also known as vents for boilers and as breeching for water heaters and modern furnaces.
The damper flapper could control a coal fire furnace by operating the furnace damper from a thermostat. In 1885, Butz decided to patent his heat controller and establish a company to make and sell it. It is believed that Mendenhall urged Butz to patent, manufacture, and sell the damper flapper.
Fugitive gas emissions are emissions of gas (typically natural gas, which contains methane) to atmosphere or groundwater [1] which result from oil and gas or coal mining activity. [2] In 2016, these emissions, when converted to their equivalent impact of carbon dioxide , accounted for 5.8% of all global greenhouse gas emissions .
Gas venting is not to be confused with similar types of gas release, such as those from: emergency pressure relief as a method of last resort to prevent equipment damage and safeguard life, or; fugitive gas emissions which are unintentional gas leaks that occur in coal, oil, and gas operations, such as from orphan wells
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