A process of removing air from fluid lines or pipes.



Related Terms

FILTRATION

The physical or mechanical process of separating insoluble particulate matter from a fluid, such as air or liquid, by passing the fluid through a filter medium that will not allow the particulates to pass through it.

BLEED VALVE

A small-flow valve connected to a fluid process vessel or line for the purpose of bleeding off small quantities of contained fluid.

DOUBLE-PIPE EXCHANGER

Fluid-fluid heat exchanger made of two concentric pipe sections; one fluid (such as a coolant) flows in the annular space between pipes, and the other fluid (such as hot process stream) flows through the inner pipe.

COMFORT AIR CONDITIONING

The process of preparing the air for temperature, humidity, cleanliness and distribution to meet human comfort levels.

PRE-MIXED FLAME

Before ignition, the fuel and air are intimately mixed. The combustion process is controlled by heat conduction and diffusion of radicals.

CONTACT ADSORPTION

Process for removal of minor constituents from fluids by stirring in direct contact with powdered or granulated adsorbents, or by passing the fluid through fixed-position adsorbent beds (activated carbon or ion-exchange resin); used to decolorize petroleum lubricating oils and to remove solvent vapors from air.

GLOVER TOWER

A tower in the lead chamber process for manufacturing sulfuric acid; in this tower the nitrogen oxide, sulfur dioxide, and air mixture is passed upward and sprayed with a sulfuric acid-nitrosyl sulfuric acid mixture.

AIR SWEETENING

A process in which air or oxygen is used to oxidize lead mercaptides to disulfides instead of using elemental sulfur.

DIRECT-EXPANSION COIL

A finned coil, used in air cooling, inside of which circulates a cold fluid or evaporating refrigerant. Abbreviated DX coil.

GRAVITY BED

A moving body of solids in which particles (granules, pellets, beads, or briquets) flow downward by gravity through a vessel, while process fluid flows upward; the moving-bed technique is used in blast and shaft furnaces, petroleum catalytic cracking, pellet dryers, and coolers.

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