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Natural gas
Natural gas is a naturally occurring hydrocarbon gas mixture consisting primarily of methane, with up to 20 % of other hydrocarbons as well as impurities in varying amounts such as carbon dioxide. Natural gas is widely used as an important energy source in many applications including heating buildings, generating electricity, providing heat and power to industry, as fuel for vehicles and as a chemical feedstock in the manufacture of products such as plastics and other commercially important organic chemicals.
Industry: Energy
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Natural gas
Flapper
Energy; Natural gas
The flow control element of a swing cheque valve; also called a disc or a clapper.
Flat face (FF)
Energy; Natural gas
A flange surface in which the gasket sealing area is the entire surface from the ID to the outside edge. Usually used for class 125 cast iron valves.
Flexible seat
Energy; Natural gas
A seat design of a ball valve that provides controlled deformation of the non-metallic seat rings when the valve is assembled.
Flexible-wedge gate
Energy; Natural gas
A wedge design flwo control element of a gate valve made of a singple piece that has a groove arround its perimeter to provide flexibility and some movement of its seating surface; also called a flex ...
Floating ball
Energy; Natural gas
A flow control element of a ball valve that is held in position in the valve body solely by the seat rings of the valve.
Flow characteristic
Energy; Natural gas
The relationship between the fluid flow rate through a valve and the position of the flow control element of the valve.
Flow coefficient
Energy; Natural gas
A measure of the flow capacity of a valve; designated as Cv it is the flow rate in gallons per minute (gpm) of 60degF water that passes through the fully open valve at 1 psi (pounds per square inch) ...
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