VentGuard™ Breathers

Des-Case VentGuard™ breathers have check-valve technology that isolates the system and only ‘breathes’ when necessary, making them an ideal solution that protect low-flow applications with intermittent operations. Check valves provide slight system pressurization that allows for controlled breathing without excessive pressure build-up. The system breathes only when pressured to do so, and then the air is cleaned and dried before it is introduced into the system, ensuring a clean, dry headspace. This control mechanism also prevents premature saturation of the silica gel and extends breather life, a problem not as easily tackled by standard desiccant breathers exposed to extreme moisture.

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Product Specs
DC-VG-BB

DC-VG-1

DC-VG-2

DC-VG-3

DC-VG-4
Unit Height (in / mm) 3.90 / 99.06 5.31 / 134.9 6.125 / 155.6 8.125 / 206.4 10.125 / 257.2
Unit Diameter (in / mm) 2.52 / 64.01 2.52 / 64.01 4 / 101.6 4 / 101.6 4 / 101.6
Connection Size 3/8" Multi-Fit (NPT, BSPP, BSPT) 3/8" Multi-Fit (NPT, BSPP, BSPT) 1" Multi-Fit (NPT, BSPT, NPSM) 1" Multi-Fit (NPT, BSPT, NPSM) 1" Multi-Fit (NPT, BSPT, NPSM)
Amount of Silica Gel (lbs / kg) 0.13 / .058 0.28 / 0.127 0.66 / 0.30 1.22 / 0.56 1.88 / 0.85
Adsorption Capacity (fl oz / ml) 0.79 / 23.3 1.68 / 49.7 4.00 / 118.2 7.45 / 220.3 11.3 / 333
Max. Flow Rate (cfm) 1.45 @ 1 psid 1.45 @ 1 psid 2.5 @ 1 psid 2.28 @ 1 psid 1.8 @ 1 psid
Max. Flow Rate (lpm) 41.06 41.06 70.5 64.5 50.9
Filter Efficiency 3µ absolute (β₃≥200) 3µ absolute (β₃≥200) 3µ absolute (β₃≥200) 3µ absolute (β₃≥200) 3µ absolute (β₃≥200)
Operating Temp. Range (°F) -20° to 200° -20° to 200° -20° to 200° -20° to 200° -20° to 200°
Operating Temp. Range (°C) -29° to 93° -29° to 93° -29° to 93° -29° to 93° -29° to 93°
Model Max. Airflow at 1 psid  Recommended Max. Volume
Gearbox / Storage Tank Hydraulic Reservoir
DC-VG-BB 1.45 / 41.06 lpm 15 gal / 57L 2 gal / 8 L 
DC-VG-1  1.45 / 41.06 lpm 35 gal / 132 L  5 gal / 19 L 
DC-VG-2  2.5 cfm / 70.5 lpm 200 gal / 757 L  60 gal / 227 L 
DC-VG-3  2.28 cfm / 64.5 lpm 350 gal / 1325 L 100 gal / 379 L 
DC-VG-4 1.8 cfm / 50.9 lpm 500 gal / 1893 L 200 gal / 757 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.

APPLICATIONS

  • Intermittent Operations
  • Gearboxes
  • Low-Flow Applications
  • High-Humidity
  • Washdown

Check-valves on the bottom of the unit isolate the system until equipment needs to breathe. As air is drawn into equipment through the breather, the layered filter elements remove particulate while the desiccant beads strip harmful moisture. While in service or during shutdown, the desiccant beads attract moisture from inside the equipment reservoir, actively drying the equipment.

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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 DC-10-S
1" Threaded Adapter DC-10
1" Male Threaded x 1" Female Threaded Adapter DC-10-T
Bell Reducer 1" to 3/4"-Slip Fit DC-17
1"-3/4" Female to Male Threaded Adapter DC-17-T
1"-1/4" Brass, Threaded Reducer/Adapter DC-18
Threaded Flange Adapter DC-12-T
Threaded Flange Adapter with Gasket DC-12-TG
Bayonet Adapter DC-15-T
3/4" NPT Vent Valve Adapter for Standard and VentGuard Breathers DC-SDVA-12M
1" NPT Vent Valve Adapter for Standard and VentGuard Breathers DC-SDVA-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
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