Degreasers, vapor

Solvent degreasing Vapors perchloroethylene, trichlorethylene, vapor decomposition (e.g., phosgene)... 

Vapor degreasing Vapor degreasing Vapor degreasing Vapor degreasing... 

Vapor degreasing. Vapor degreasing has been a very popular cleaning method for removing oily soils. Boiling solvent condenses on the cool surface of the product and flushes away oily soils, but does not remove... 

Incorrect sequencing of steps improper positioning of controls prolonged exposure of parts to degreasing vapors materials moved from degreasing tank to quickly solvent tank level not maintained... 

Vapor condensation (cleaning) A process in which a solvent is heated to form a vapor cloud above the surface and a cold part is suspended in the vapor. The solvent condenses on the cold part and flows off into the sump, carrying the contaminants with it. When the part is heated to the vapor temperature, condensation ceases and cleaning action stops. See also Degreaser, vapor. 

Solvent Gleaning. Solvent cleaning employs the natural solubilizing properties of various nonaqueous solvents or blends of solvents. Either 100% solvents or aqueous emulsions of solvents can be used. AppHcation is typically by immersion, hand appHcation, or via a vapor degreaser machine. 

Vapor Degreasing. In vapor degreasing, the solvent is vaporized and the cold part is suspended in the vapor stream. The solvent condenses on the part, and the hquid dissolves and flushes dirt, grease, and other contaminants off the surface. The part remains in the vapor until it is heated to the... 

Trichloroethane and other chlorinated solvents are used for vapor degreasing (84—90). Other uses include cold metal cleaning, printed ckcuit board cleaning, and as a solvent for inks, coatings, adhesives, and aerosols. 1,1,1-Trichloroethane is an excellent solvent for development of photoresist polymers used in printed ckcuit board manufacture (see Integrated circuits Photoconductivepolymers). 

The demand for trichloroethylene grew steadily until 1970. Since that time trichloroethylene has been a less desirable solvent because of restrictions on emissions under air pollution legislation and the passage of the Occupational Safety and Health Act. Whereas previously the principal use of trichloroethylene was for vapor degreasing, currentiy 1,1,1-trichloroethane is the most used solvent for vapor degreasing. The restrictions on production of 1,1,1-trichloroethane [71-55-6] from the 1990 Amendments to the Montreal Protocol on substances that deplete the stratospheric ozone and the U.S. 

Clean Air Act 1990 Amendments will lead to a phase out of 1,1,1-trichloroethane by the year 2005, which in turn will likely result in a slight resurgence of trichloroethylene in vapor-degreasing appHcations. The total production, however, will probably stay relatively low because regulations will require equipment designed to assure minimum emissions. 

The details are then removed from the tool for anodizing and priming. They are first processed through a multi-tank anodize line that consists of a vapor degreaser... 

Honeycomb core parts are usually supplied from the core manufacturer clean and packaged in such a way that additional cleaning is not necessary. If this is not the case or if secondary machining is necessary, the core detail is cleaned by vapor degreasing or emulsion cleaning to remove organic contaminants. 

Chlorinated solvent vapor degreasers can be replaced with high pressure power washers which do not generate spent solvent hazardous wastes or toxic fugitive emissions. 

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