Normally when the word vacuum is used it refers to any absolute pressure below that of normal atmospheric pressure. Atmospheric pressure is defined as 14.6 psia or 760 torr, any pressure less than this is considered a vacuum. In a vacuum furnace, the heat-treating process takes place inside a vessel that is airtight. This allows a vacuum to be drawn inside the vessel. The entire heat-treating process can take place under vacuum or precisely controlled atmospheres can be introduced. Heat treating under vacuum can: prevent surface reactions, such as oxidation or decarburization; remove surface contaminants such as oxide films and residual traces of lubricants; add a substance to the surface layers of the work; remove dissolved contaminating substances from metals by means of degassing.


Products & Services
Laboratory Ovens
Laboratory ovens are used in a variety of thermal processing applications including general lab work, component and stability testing, core hardening, drying glassware, and sterilizing. 
Laboratory Furnaces
Laboratory furnaces provide continuous heating to process samples and materials.
Furnaces (Industrial)
Industrial furnaces are built of several kinds of high temperature (refractory) materials to hold the process material and hold in the heat without breaking down during the several months that they usually run. 
Ovens (Industrial)
Industrial ovens are batch or continuous process enclosures or tunnels that are insulated and used for thermal processing. Ovens are lower temperature (usually < 1400° F) thermal processing units, usually without refractory insulation.
Vacuum Ovens
Vacuum ovens are heat-treating ovens that use a low atmospheric pressure instead of a protective gas atmosphere. This helps to alleviate surface reactions. 

Product Announcements
Powell Electronics, Inc. - Space-Grade Connectors with Vacuum Degassing
Amphenol D38999 G Class Series III Connectors with Vacuum Degassing What is Vacuum Degassing? Degassing (or gas-off) is required of connectors and other components in space applications. As the name... (read more)
 

Topics of Interest

vacuum A low-pressure gaseous environment whose pressure is lower than the ambient atmospheric pressure. vacuum brake A type of power-assisted vehicle brake. Its released position is maintained by...

Proper treatment of boiler feed water is an important component of a boiler system. As steam is produced, dissolved solids become concentrated and deposit inside the boiler. This leads to poor heat...

8.1 EJECTORS Industry has grouped pressures below atmospheric level into [1]: Range of Pressure Rough vacuum 760-1 torr Medium vacuum 1-0.001 torr High vacuum 0 001-10-7torr Ultra-high vacuum...

Absolute Pressure - A quantity of pressure with respect to total vacuum. Equal to the sum of a pressure gauge reading and atmospheric pressure (14.69 psia at sea level). Absorption - The "soaking up"...

Chapter V: V Volatiles V Symbol for the element vanadium. Abbreviation for volume ( V or v). Symbol for the shearing force in beam ( V). Symbol for velocity ( v). vacuum deposition Also known as...