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(mechanical engineering)
A device in which oxygen, carbon dioxide, or other noncondensable gases are removed from boiler feedwater, steam condensate, or a process stream.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a device for the deaeration of water—that is, the removal of gases dissolved in it. Deaerators are usually installed in steam power plants and are used to treat feed water delivered to steam generators and supplementary water delivered to the heating network. In the absence of deaeration the corrosive active gases usually dissolved in water (oxygen and free carbon dioxide), which are liberated in a steam generator or heating network, would cause corrosion of metals. Deaerators can be classified according to their principle of operation as thermal (the most widely used type), desorption, or chemical types.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

air-oil separator

air-oil separatorclick for a larger image
A component in a gas turbine lubrication system in which air is removed from scavenged oil before its return to the oil tank. The scavenged oil is churned, resulting in air coming to the surface, which is then bled out before returning the oil to the tank. Also called a deaerator.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
The "Global Nuclear Deaerator Market Analysis & Trends - Industry Forecast to 2027" report has been added to's offering.
Regarding to the cleaning devices, including deaerator, it may be an indication of the states in which the major contaminants are in environment and removed in the device.
A pressurised deaerator is one way to meet the requirements of BS EN 12953 Part 10.
Table 2--Formulation for a Wood Coating for Furniture Raw Materials Blank Self-crosslinking acrylic emulsion 72.80 Deionized water 5.30 Ammonia 25% Acetylenic superwetter 0.40 Dipropylene glycol methyl ether 3.20 Di-ethylene glycol 3.20 Isopropanol (IPA) 1.60 Deionized water 1.80 Ammonia 25% Wax emulsion 4.20 Hydroxythioether superwetter 0.10 Deionized water 5.10 Deaerator 1.00 Rheology modifier 1.30 Total 100.00 Figure 7 shows a comparison of the amount of foam seen with the microscope on the surface of the sprayed panels for different deaerators and defoamers.
Both pumps have a 1-inch discharge recirculation line that provides a minimum continuous flow of 10 percent (about 30 gpm in this case) back to the deaerator to assure against a "no flow" condition inside the pump when the steam drum level control valve goes automatically closed.
The energy balance equation for the deaerator comprising of the first and second stages can be estimated from the relation
SPIRAX SARCO has launched a pressurised deaerator system that Is said to reduce the dissolved oxygen content of boiler feedwater to virtually nil without chemical treatment.
Evonik has launched Tego Airex 921, a deaerator that has been designed specifically for UV-curable printing inks and coatings for food packaging.
There are several quick and easy lab screening tests that help the formulator find the right defoamer or deaerator. These cannot replace the final test run on a printing press, but can significantly narrow the number of potentially suitable additives.
Air Products has won the 2012 Ringier Coatings Technology Innovation Award for its new Airase 8070 deaerator, a high performance, siloxane polyether-based deaerator for controlling microfoam and pinholes in waterborne coatings, especially those applied with high-speed techniques such as airless or air-assisted spray.