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Barry Opdahl is the sustaining engineering manager at Gruenberg, New Columbia, Pa. Gruenberg is a division of Thermal Product Solutions LLC (TPS). For more information from Gruenberg, call 570-538-7200 or visit gruenberg.com.
Low oxygen Class A ovens can evaporate large volumes of solvent while requiring only a small flow of nitrogen to maintain the inert condition. This results in vapor concentrations that are suitable for condensing using chilled water or even tower water.
Most process engineers are aware of Class A safety ovens used for processing volatile, flammable solvents. The requirements for these ovens are outlined in NFPA 86 Standard for Ovens and Furnaces. Though less well known, another type of Class A oven also is described in NFPA 86. It is called a low oxygen atmosphere Class A oven with solvent recovery.
