oil filtration

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Oil Filtration
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• The vacuum dehydration process lowers the partial
  pressure, which assists in removing the water
  from the oil. Just like boiling water on top of
  Mount Everest, lowering the pressure allows water
  (and other volatile materials) to boil at a much
  lower pressure.

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• At the typical pressures used by most vacuum
  dehydrators (25" to 28" of mercury), water boils
  at 49C to 55C. By heating the oil, typically to
  66C to 71C, water is vaporized inside the
  dehydrator, without causing excessive oil
  degradation due to thermal and oxidative stress.

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• In most dehydrators, the air is warmed and dried
  prior to being passed over the oil, encouraging
  the water to transfer from the oil into the air.

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• To maximize the process, the oil is thinned to
  obtain the greatest amount of surface area
  exposure possible. This is achieved by allowing
  the oil to pass over a number of surfaces
  internally in the vacuum chamber, or by creating
  an umbrella spray within the chamber through
  which the dry air passes.

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• The real benefit of this process is its ability
  to remove dissolved water and other low-boiling
  liquid impurities such as fuels and solvents. The
  removal of dissolved water makes it ideal for
  systems requiring low target levels of moisture.

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• It is particularly useful in environments where
  large volumes of oil are at risk from the process
  or system, such as in steam turbines or paper
  mills.

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• In fact, for lightly additized oils such as
  turbine oils and transformer oils, a vacuum
  dehydrator can remove as much as 80 percent to 90
  percent of dissolved water, achieving water
  levels as low as a few ppm.

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• The main disadvantage of vacuum dehydrators is
  their cost and comparatively low flow rate.
  Because of the cost, many companies chose to rent
  dehydrators on an as-needed basis rather than
  purchase them.

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• The main advantage of vacuum dehydrators is that
  they offer the ability to remove moisture to very
  low levels. The greater the volume of oil and
  water, and the lower the target moisture level,
  the more cost-effective vacuum separation
  becomes.

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• For details information, visit us

http//www.biokem.com.au/