HydroGuard® Breathers

Des-Case HydroGuard® breathers uniquely feature an expansion chamber and internal check valves that create a nearly-sealed system. Designed specifically for steady-state operations with minimal temperature fluctuations, these breathers provide excellent protection in continuous duty applications.


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Product Specs

Unit Height (mm) 183 247.66
Unit Diameter (mm) 64 104.1
Connection Size 3/8" Multi-Fit (NPT, BSPP, BSPT) 1" Multi-Fit (NPT, BSPP, BSPT)
Amount of Silica Gel (kg) 0.125 0.24
Adsorption Capacity (ml) 49.6 120
Max. Flow Rate (lpm) 39.93 @ 70 mbar 70.5 @ 70 mbar
Filter Efficiency 3µ absolute (β₃≥200) 3µ absolute (β₃≥200)
Operating Temp. Range (°C) -29° to 93° -29° to 93°
Customized desiccant breathers offer several alternative or secondary agent media options that can be mixed to meet specific environmental and chemical needs.




ORANGE SILICA GEL - Silica gel is the most efficient and economic moisture adsorbent for general applications. Des-Case offers two types of indicating silica gel, blue-to-pink or orange-to-white. The difference between the two is the chemical used to indicate the color-change. Blue-to-pink uses cobalt chloride and orange-to-white uses ferric ammonium sulfate.


ACTIVATED CARBON - Activated carbon is an ideal adsorbent in applications requiring fume mitigation or air purification.


MOLECULAR SIEVE - Molecular sieve has high efficiency at low levels of humidity. It is best for drying highly polar alcohols, unsaturated hydrocarbons, and static dehydration of gas.


ACTIVATED ALUMINA - Activated alumina is most effective in removing organic acids, especially those that are larger in size.


LAYERED (BLUE SILICA GEL & MOLECULAR SIEVE) - Mixing media such as silica gel and molecular sieve are ideal for customers needing to adsorb both moisture and fumes simultaneously.


Contact Des-Case at 615.672.8800 or at [email protected] for help choosing the correct media for your application.

Model Max. Airflow at 70 MBAR Recommended Max. Volume
Gearbox / Storage Tank Hydraulic Reservoir
DCE-HG-1 39.93 lpm 189 L N/A
DCE-HG-8 70.5 lpm 1514 L 208 L

Please Note: This is intended as a general guideline for sizing only; other considerations, such as: humidity level, frequency of air flow, ambient temperatures, and chemical compatibility are very important in sizing a breather properly. Larger applications and special circumstances typically require the most thorough analysis. Please contact Des-Case for assistance in sizing a breather.


  • Steady-State Operations
  • Gearboxes
  • High Humidity
  • Washdowns
  • Low Flow Applications

As wet, contaminated air is drawn through the unit, multiple 3-micron polyester filter elements remove solid particulate while 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.


Seeing Pink?

A pink breather means it has done its job keeping moisture out of your lubricants. Time to replace the breather with a new one.

Description Part Number
1" FNPT x 1" Slip Fit Adapter DCE-10-S
1" Threaded Adapter DCE-10
1" Male Threaded x 1" Female Threaded Adapter DCE-10-T
Field Flange Adapter-Slip Fit (DCE-HG-8 only) DCE-12-S
Bell Reducer 1" to 3/4"-Slip Fit DCE-17
1"-3/4" Female to Male Threaded Adapter DCE-17-T
1"-1/4" Brass, Threaded Reducer/Adapter DCE-18
Threaded Flange Adapter DCE-12-T
Threaded Flange Adapter with Gasket DCE-12-TG
Bayonet Adapter DCE-15-T
  • Removes moisture in the headspace of equipment
  • Eliminates rust-forming condensation
  • Prevents sludge deposits and water-contaminated oil
  • Prevents contamination ingress
  • Provides longer lubricant life
  • Reduces wear and tear on equipment, prolongs life
  1. What is the application?

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