4 Terms
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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
ambient temperature
Energy; Natural gas
The temperature of the environment surrounding a valve, normally ranging from -20degF to 100degF
angle valve
Energy; Natural gas
A globe valve whose ends are perpendicular to each other, rather than parallel; one end is directly below the disc.
gland
Energy; Natural gas
A tubular part that fits over a valve stem or shaft that is used to compress packing. Also called a gland bushing.
gland flange
Energy; Natural gas
A part that fastens to the bonnet of a valve used to apply force to the gland. It is usually found on valves with outside-screw-and-yoke (OS&Y) stem designs.
gland follower or gland flange
Energy; Natural gas
The component used to hold down or retain the gland in the stuffing box.
gland nut
Energy; Natural gas
A nut that threads onto or into the top of the bonnet of a valve to apply force to the gland.
gland or gland bushing
Energy; Natural gas
The part of the valve which retains or compresses the stem packing in a stuffing box.
