19 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
Drain
Energy; Natural gas
An opening in the valve body for the removal of fluid from the valve or the pipeline; it may be filled with a removable plug or with a pipe nipple and a sop valve that is normally closed.
Drain plug
Energy; Natural gas
A fitting at the bottom of a valve, the removal of which permits draining and flushing the body cavity.
Elastomer
Energy; Natural gas
A synthetic non-mettalic material with properties similar to those of natural rubber.
Electric actuator
Energy; Natural gas
An actuator that uses an electric motor to supply external energy to the valve; also called electic motor operator or an E.M.O.
Emergency seat seal
Energy; Natural gas
A fitting on the valve body through which sealant can be injected to effect a seat seal in an emergency situation.
End connexion
Energy; Natural gas
The type of connexion supplied on the ends of a valve which allows it to be connected to piping - may be weld end, flanged end, threaded or socketweld.
Equal percentage flow characteristic
Energy; Natural gas
A flow characteristic in which equal increments fo flow control element travel distance produce equal percentage changes in the flow rate through the valve; changes in the flow rate are small at the ...
