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Many
fluids, semi-solids and powders are seriously effected by moisture
and other contaminants. Most of the materials which are effected,
are stored in tanks which are either located in the open and
vented to atmosphere or are located in the process area and
effected by other materials used in the same area.
The level of damage varies from rendering the materials useless
to the lowering of efficiency and consequently the value.
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The
ingress of these contaminants occurs whenever material is
drawn from the tank or by diurnal barometric pressure and
thermal breathing caused by changes in ambient temperature.
Moisture, in the form of water vapor, is the prime source
of contamination and will cause simple dilution of acids,
an increase in the corrosivity of oils and other fluids, fungal
or biological activity in materials such as glycerol, or the
lowering of electrical resistance of transformer oils and
similar materials.
In addition to water vapor, other contaminants which can be
removed include: Acetone, Ammonia, Carbon Dioxide, Carbon
Monoxide, Ethylene, Formaldehyde, Freon, Hydrogen Sulphide,
Oxides of Nitrogen, Sulphur Dioxide, Toluene, Acid and Oil
Vapors, etc.
Typical adsorbents used are: Molecular Sieves, Silica Gel,
Activated Alumina, Activated Carbon, Soda Lime, Ethysorb,
etc.
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The
selective use of desiccants such as molecular sieves, silica
gel and activated alumina, together with a wide range of other
adsorbents in its tank vent dryers and adsorption units, enables
Drytech to offer a high level of protection to a wide range
of materials.
Typical materials which can be readily protected include:
Acetic Acid, Brake Fluid, Ethanolamine,
Genklene, Glycerol, Monomethylemethacrylate, Perklone® perchloroethylene
(a trade mark of INEOS Chlor Limited), Polyalcohols, Polythers,
Sulphuric Acid, Transformer Oils, Triklone® trichlorethylene
(a trade mark of INEOS Chlor Limited), etc.
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