Hybrid Breathers

For specialty applications

From the expansion chamber system to the check valves, every element of Des-Case’s patented Hydroguard™ hybrid breather has been designed to stand up to a wide variety of industries and applications.

The breather is outfitted with an expansion chamber to isolate lubricants from all levels of ambient humidity. A clear, rugged polycarbonate casing allows for viewing desiccant as it changes color, indicating that the breather should be replaced. Check valves ensure no excess pressure/vacuum builds.

Des-Case hybrid breathers attack the source of contamination, allowing your equipment and lubricants to run longer and harder.


  • Expansion chamber and internal check valve system create a nearly-sealed system
  • Integrated nylon standpipe and clear polycarbonate casing allow for greater chemical compatibility and vibration resistance
  • Filter captures particles as small as 0.5µ

Ideal for ...

  • Gearboxes
  • Washdowns
  • High-humidity applications

How it works

As wet, dirty air is drawn through the unit, multiple 0.5-micron polyester filter elements remove solid particulate and the color-indicating silica gel extracts moisture. The diaphragm allows for expansion/contraction of the air within the casing as a result of temperature variations during steady-state operations. When air is expelled from the container, the top foam pad prevents oil mist from contacting silica gel or entering the atmosphere. The hygroscopic agent is partially reactivated by the dry air passing back through.

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