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    Process Description

    Published: 01 January 1962

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    Vapor degreasing is a physical method of removing solvent soluble soils and other soils trapped therein from metal, glass, and other objects by bringing the soiled article(s), which is at ambient temperature, in contact with hot solvent vapor. The hot solvent vapor condenses on the article(s) in sufficient volume to form a liquid flow which carries the soil from the article(s) as the solvent drains by gravity. In its simplest form (as shown in Fig. 1) a solvent vapor degreaser is a tank with some means of boiling the solvent and some means of controlling the vapors in the upper section. The articles to be cleaned are suspended in this air-free zone of solvent vapors, which condense on the cool parts to dissolve oils and greases and to give a continuous rinse in clean solvent. As the condensed solvent drains from the part, it carries off the soil and returns to the boiling liquid reservoir. This vapor treatment is often augmented by mechanical action such as liquid immersion or spraying the work with liquid solvent beneath the vapor zone. The work is held in the vapor zone for final rinsing and drying until the parts reach vapor temperature, at which time condensation stops. The articles are then withdrawn from the machine. The process is a safe, rapid, economical procedure for preparing dry, clean articles for subsequent finishing or fabricating teps, usually without further treatment.

    Committee/Subcommittee: D26.02

    DOI: 10.1520/STP45790S