A valve designed to slowly relief a liquid or gas form system.



Related Terms

SOLID BULK CARGO

Any material, other than liquid or gas consisting of a combination of particles, granules, or any larger pieces of material, generally uniform in dimension and composition which is loaded into a cargo space directly without any packaging or intermediate form of containment.

NOx

Any combination of nitrogen and oxygen in a compound form. The most common in terms of environmental considerations is NO, which constitutes 90% of combustion NOx emissions, and NO2. All NO is eventually converted to NO2 in the atmosphere. Hence, most regulations are written to assume that the NOx which is emitted is in the form of NO2. Nox emissions are influenced by many factors, including furnace temperature, flame temperature, burner design, combustion air temperature, nitrogen content of liquid fuels, ammonia content of gas fuels, and other factors.

BATCH RECTIFICATION

Batch distillation in which the boiled-off vapor is re-condensed into liquid form and refluxed back into the still to make contact with the rising vapors.

GAS SCRUBBING

Removal of gaseous or liquid impurities from a gas by the action of a liquid; the gas is contacted with the liquid which removes the impurities by dissolving or by chemical combination.

AUTO-IGNITION TEMPERATURE

The lowest temperature to which a liquid or gas requires to be raised to cause self-sustained spontaneous combustion without ignition by a spark or flame.

ANTI-SIPHON VALVE

A valve allowing air ingress to a liquid filled line, thus limiting siphon action development.

BASKET STRAINER

A porous-sided or screen-covered vessel used to screen solid particles out of liquid or gas streams.

CASTNER PROCESS

A process used industrially to make high-test sodium cyanide by reacting sodium, glowed charcoal, and dry ammonia gas to form sodamide, which is converted to cyanamide immediately; the cyanamide is converted to cyanide with charcoal.

AIR ESCAPE

A device that is fitted to a pipe carrying a liquid for releasing excess air; it contains a valve that controls air release while preventing loss of liquid.

VACUUM SEPARATOR

A separator that utilizes subatmospheric pressure to remove certain gases and liquids from another liquid because of their difference in vapor pressure.

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