Lubricants moisture contamination

Again, irrespective of the hardware the chemistry is consistent. The partially regenerated fiber from the spinning machine is contaminated with sulfuric acid, 2inc sulfate, sodium sulfate, carbon disulfide, and the numerous incompletely decomposed by-products of the xanthation reactions. The washing and drying systems must yield a pure cellulose fiber, suitably lubricated for the end use, and dried to a moisture level of around 10%. 

Corrosive fluids or contaminants must be identified to the manufacturer. The principle gas stream may or may not be corrosive under some set of circumstances, yet the contaminants might require considerable attention in cylinder design. For example, considerable difference exists between handling bone-dry pure chlorine gas and the same material with 5 ppm moisture. The corrosiveness of the gas must be considered when selecting lubrication materials for the compression parts as well as seals, lubricants, etc. 

Those lubricants marked M easily absorb moisture and great care must be taken to prevent exposure to air when adding new oil. The moisture in the air will be absorbed into the oil and will lead to contamination of both refrigerant and oil. With hermetic compressors this can lead to motor winding failure. 

Compressed air is one of the utilities that may have direct or incidental product contact and therefore requires qualification. The types of contaminants found in compressed air, not surprisingly, are the same as those found in the ambient environment. These may include micro-organisms (e.g., bacteria, molds, and viruses), moisture, particulate matter, and possibly pyrogens. Undesirable levels of hydrocarbons from compressor lubricants may be found if the compressor is not of the oil-free type. 

Contamination Control. Lubricating oils collect contaminants, such as particles and moisture, and transport them to settling tanks, centrifugal separators, filters, etc. Some lubricants, such as crankcase oils, are formulated with additives to disperse contaminants that reduce the risk of deposit formation, corrosion, or premature filter plugging. 

Particles, moisture, soot, heat, air, glycol, fuel, detergents, and process fluids are all contaminants commonly found in industrial lubricants and hydraulic fluids. However, particle contamination is widely recognized as the most destructive contaminant to the oil and machine. This is the reason why the particle counter is the most widely used instrument in oil analysis today. The central strategy to its success in reducing maintenance costs and increasing machine reliability is proactive maintenance. 

Fitch, J.C. Jaggernauth, S. Moisture—the second most destructive lubricant contaminant, Part I— Its effects on bearing life. Proceedings of the JOAP Condition Monitoring International Conference, November, 1994. 

It is important that no moisture or oil passes through the compressor and on to the blasted surface. Use a white rag to determine the quality. A black light may also be used to determine oil contamination. One hundred percent oil-free air can be supplied by rotary screw, two stage lubrication-oil-free compressors. 

There are a wide range of liquid filters used in industries, especially in the filtration of fuel, lubricants, and water. Oil filters are required to compliance with international contamination code of cleanliness for the fluid contamination levels (ISO 4406) and corresponding filtration standards (eg, ASTM D3948-14). The required filtration efficiency and dirt holding capacity for the removal of solid particles, water droplets, and water moisture from oil fuel/lubricants depend on the filtration system used, the required cleanliness levels of the oil, and the oil properties (eg, viscosity and surface tension), which influence the fibre wetting process in liquid filtration. Examples of the standards defining the performance requirements and testing methods for fuel and lubricant filtrations are as follows. 

Contamination by water and/or ethylene glycol caused by coolant leaks from deteriorated seals and moisture from condensation affects all industrial and automotive lubricants, in particular hydraulic equipment. If equipment is... 

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