An integral part of effective water control is the ability to efficiently remove water from the hydraulic or lubrication system. Depletes some additives and reacts with others to form corrosive by-products which attack some metals. I decided to read Issue #30 and I couldn't put it down. Yes, water contamination can be problematic, but how can water be measured? The reaction of oxygen with fluid basestock forms oxygenated compounds and is accelerated by heat and the presence of water. Karl Fischer Titration
Can it be controlled? The high temperature and vacuum employed in flash distillation devices can lead to loss of lower boiling base stock fractions and volatile additives, and can result in thermo-oxidative fluid degradation - serious drawbacks if fluid integrity needs to be preserved. hbspt.cta.load(3951034, 'c99217f3-09e7-4751-bc3a-7739dac44a0e', {}); R.E. Methods for Water Removal
Note that the white dots in Figure 3 represent the porosity of the gold layer. Sharpe Equipment Inc.
www.hydraulicspneumatics.com is using a security service for protection against online attacks. This however does not account for ingression of water, which is why it is recommended to set the control level to 50 percent saturation, as this provides a safeguard against surface corrosion or loss of fluid characteristics (for example, lubricity, compressibility) due to the presence of free water. This method is typically used for water content specifications. The control level should be selected, where possible, at the lowest anticipated system temperature, such as cold ambient during a shutdown. Michael S Lawrence
Relative content expressed as percent of saturation indicates the fluid water content relative to its saturation level at a given temperature. How much water a fluid can hold at saturation strongly depends on the fluid base stock type, the additive package, temperature and pressure. So Valuable It Earned Me A Raise
Conclusions
The presence of water in hydraulic fluids and lubricants can have wide-ranging effects on system components. In the case of small systems with high levels of water contamination, changing the oil may be more cost-effective than using any of the above methods of water removal. Coalescers separate water droplets from the fluid stream by arresting them on or near the surface of a filter or screen so that the droplets fuse together (coalesce) and grow to a size that allows them to fall to the bottom of the vessel where they can be extracted. Please enable JavaScript on your browser and try again. Cantley. ?The knowledge I've gained from this newsletter has been so valuable it has earned me a raise!? Heavy Equipment Mechanic
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But what exactly does that mean? Vacuum dehydration purifiers are used to dry hydraulic fluids and lubricants by exposing them to a partial vacuum. ASLE, J. Fitch and S. Jaggernauth. (Vacuum) pressure is the main factor. Sources of Water
Cantley developed an equation linking the relative bearing life and the water content of the lubricant used in the tests, an SAE 20 fluid containing rust- and oxidation-inhibiting additives. The ultimate choice depends upon whether a quick assessment or a precise measurement is required. While this is a reliable and accurate method, the major drawback is the time lag between sampling and analysis results. States of Water
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www.hydraulicspneumatics.com is using a security service for protection against online attacks. For instance, highly refined mineral oils with few additives hold little water before becoming saturated, about 100 parts per million (ppm) at 70°F. Centrifuges separate water from fluids by centrifugal force and utilize differences in specific gravity between the fluid and the water for the separation. Fluid viscosity is one of the factors that determines whether full-film lubrication is achieved and maintained. Can't Put It Down
Reduces lubricant film-strength, which leaves critical surfaces vulnerable to wear and corrosion. Water and oil don't mix - it's a well-known adage in the lubrication business. The fluid is fed into the vacuum chamber where it is spread into a thin film to reduce the path length for the water to reach the free surface and so be transferred to the air. They remove free and some of the emulsified water (depending on the relative stability of the emulsion), but do not remove dissolved water. Absorbent filters remove free and emulsified water by super absorbent polymers impregnated in the filter matrix. Capacitive Water Sensor
You will be redirected once the validation is complete. Capacitive Water Sensor Technology. "A Study of the Invisible but Measurable Particulate Contaminants in Hydraulic Systems.".
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For this reason, an oil can contain a significant concentration of dissolved water with n… There are a variety of techniques to measure the quantity of water in hydraulic fluids and lubricants. Absorptive water removal is not well-suited when large amounts of water are present in the fluid and do not remove dissolved water or strongly emulsified water.