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Des-Case Extreme Duty Desiccant Breathers

The Des-Case Extreme Duty (XD) desiccant breather has excellent vibration and impact resistance, can withstand broad temperature ranges, has expansive chemical compatibility, and features quality check valve technology while still accommodating higher air flow. The Extreme Duty breather also has the best filter efficiency of any Des-Case breather―down to 0.3µ absolute (β0.3≥200).

Des-Case Extreme Duty Breathers


  • Off-Road & Mobile Equipment
  • Steel
  • General Manufacturing
  • Food & Beverage
  • Mining


  • Mobile & Off-Road Equipment
  • Hydraulics
  • Nautical Applications
  • Truck Differentials


  • Harsh Environments
  • High Vibration / Impact
  • Washdowns


Extreme Duty Breather Cut Thru

1 Quad Check Valves

Check-valves provide system pressurization, protecting system integrity and extending product life.

2 Filter Element

ePTFE filter removes airborne contamination to 0.3-micron absolute. Stops free water.

3 Water Vapour Adsorbent

Color-indicating silica gel adsorbs water from incoming air. Replace when color changes from blue to pink.

4 Filter Element

Second particulate filter element protects against migration of desiccant.

5 Visual Indicator

Windows on two sides of breather allow for easy monitoring of desiccant.

6 Rugged Housing

Constructed from a PC/PBT alloy that maximizes chemical compatibility at the surface and impact resistance at the core.

7 Foam Pad

Foam filter captures any oil mist and disperses incoming air evenly over filtration and drying areas.

8 Integrated Standpipe

Resilient construction provides durability and allows oil mist to coalesce and drain back into the reservoir


Product Specs DC-XD-6
Unit Height (in / mm) 6.5 / 165
Unit Diameter (in / mm) 5.1 / 129.5
Connection Size 1 1/2" x 16 UN female thread
Amount of Silica Gel (lbs / kg) 1.75 / 0.79
Adsorption Capacity (fl oz / ml) 10.65 / 315
Max. Flow Rate (cfm) 16 @ 1 psid
Max. Flow Rate (lpm) 456
Filter Efficiency 0.3µ absolute (ß3≥200)
Operating Temp. Range (°F) -40° to 300°
Operating Temp. Range (°C) -40° to 149°

Model Suction / Return Rate (gpm / lpm)
Gearbox / Storage Tank Max Volume (gal / L) Hydraulic Reservoir Max Volume (gal / L)
DC-XD-6 120 / 456 500 / 1893 200 / 757

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.

Description Part Number
1" NPT Threaded Adapter for DC-XD-6 DC-DSA-10
3/4" NPT Threaded Adapter for DC-XD-6 DC-DSA-17
3/4" NPT Vent Valve Adapter for DC-XD-6 DC-XDVA-12M
1" NPT Vent Valve Adapter for DC-XD-6 DC-XDVA-16M
  • 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

Reduce downtime & improve reliability

We can also provide independent advice about your oils through modern oil analysis techniques.

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