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Energy
Anything related to the production or supply of energy in any form.
23Categories 123009Terms
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Energy > Natural gas 
backseat
Energy; Natural gas
An auxiliary seat in the bonnet to enable packing replacement while the valve is under pressure.
ball valve
Energy; Natural gas
A type of valve whose flow control element is a ball with a circular passage through it and that rotates 90 deg from open to closed.
blowdown
Energy; Natural gas
The difference between the set (opening) pressure and the disc reseating pressure of a pressure relief valve, which is usually expressed as a percentage of the set pressure.
body
Energy; Natural gas
The part of a valve that houses the flow control element, contains seating surface, retains fluid pressure, and in most valve designs, has ends for attaching to connecting pipe.
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