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Rebuildable Steel Breathers

Des-Case Rebuildable Steel (RS) breathers were designed specifically for applications, such as bulk storage tanks or large circulating lube oil systems, where there are very high temperatures, extremely polluted air, or a corrosive environment. They are ruggedly designed, with housings of powder-coated carbon steel or stainless steel. The hygroscopic agent (desiccant) is enclosed in a bag of polypropylene filter material. This desiccant bag filter is easily installed when it is time to replace or recharge the unit. The 1-micron pleated filter has a large surface area, resulting in long service life. Like the bag filter, it is easily replaced without removing the breather from service. Rebuildable Steel breathers accommodate large air flow rates with minimal pressure drops.

Compare Models (10)

Specifications

Model Specs

Model Unit Height (in / mm) Unit Diameter (in / mm) Connection Size Amount of Silica Gel (lbs / kg) Max. Flow Rate (cfm) Max. Flow Rate (lpm) Filter Efficiency Operating Temp. Range (°F) Operating Temp. Range (°C)
DC-RS-3 11.50 / 292 10.13 / 257 2″ 3 / 1.36 85 @ 0.5 psid 2407 1µ absolute (β₁≥1000) -20° to 220° -29° to 104°
DC-RS-5 13.75 / 349 10.13 / 257 2″ 5 / 2.27 85 @ 0.5 psid 2407 1µ absolute (β₁≥1000) -20° to 220° -29° to 104°
DC-RS-9 18.25 / 454 10.13 / 257 2″ 9 / 4.08 80 @ 0.5 psid 2265 1µ absolute (β₁≥1000) -20° to 220° -29° to 104°
DC-RS-15 19.25 / 489 15.5 / 394 3″ 15 / 6.80 205 @ 0.5 psid 5805 1µ absolute (β₁≥1000) -20° to 220° -29° to 104°
DC-RS-25 22.5 / 571 15.5 / 394 3″ 25 / 11.34 140 @ 0.5 psid 3964 1µ absolute (β₁≥1000) -20° to 220° -29° to 104°
DC-RS-50 31.25 / 794 15.5 / 394 3″ 50 / 22.68 115 @ 0.5 psid 3256 1µ absolute (β₁≥1000) -20° to 220° -29° to 104°
DC-RS-75 39.75 / 1,010 15.5 / 394 3″ 75 / 34.02 80 @ 0.5 psid 2265 1µ absolute (β₁≥1000) -20° to 220° -29° to 104°
DC-RS-100 31 / 787 23.5 / 597 4″ 100 / 45.36 270 @ 0.5 psid 7645 1µ absolute (β₁≥1000) -20° to 220° -29° to 104°
DC-RS-150 36.75 / 933 23.5 / 597 4″ 150 / 68.04 250 @ 0.5 psid 7079 1µ absolute (β₁≥1000) -20° to 220° -29° to 104°
DC-RS-200 42.75 / 1,066 23.5 / 597 4″ 200 / 90.72 240 @ 0.5 psid 6796 1µ absolute (β₁≥1000) -20° to 220° -29° to 104°

Model Sizing

Model Suction/Return Rate at 0.5 psid (gpm/lpm) Gearbox/Storage Tank Max. Volume (gal/L) Hydraulic Reservoir Max. Volume (gal/L)
DC-RS-3 636 / 2407 800 / 3,028  400  / 1,514 
DC-RS-5 636 / 2407  1,300 / 4,921  600  / 2,271 
DC-RS-9 598 / 2265  2,400  / 9,085  1,200  / 4,542 
DC-RS-15 1,534  / 5,805  4,000  / 15,142  1,800  / 6,814 
DC-RS-25 1,047 / 3,964  7,000  / 26,498  Contact Des-Case
DC-RS-50 860  / 3,256  14,000  / 52,996  Contact Des-Case
DC-RS-75 598 / 2,265  21,000  / 79,494  Contact Des-Case
DC-RS-100 2,020  / 7,645  30,000  / 113,562  Contact Des-Case
DC-RS-150 1,870 / 7,079  50,000  / 189,271  Contact Des-Case
DC-RS-200 1,795  / 6,796  75,000  / 283,906  Contact Des-Case

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.

Did You Know...

Adapters

Part Number Description Adapter Type
DC-13-4C 1″ NPT Steel
DC-13-6C 2″ NPT (DC-RS-3, DC-RS-5, DC-RS-9) Steel
DC-13-10C 3″ NPT (DC-RS-15, DC-RS-25, DC-RS-50, DC-RS-75) Steel
DC-13-40C 4″ NPT (DC-RS-15, DC-RS-100, DC-RS-150, DC-RS-200) Steel
DC-13-4C-SS 1″ NPT Stainless Steel Stainless Steel
DC-13-6C-SS 2″ NPT Stainless Steel (DC-RS-3, DC-RS-5, DC-RS-9) Stainless Steel
DC-13-10C-SS 3″ NPT Stainless Steel (DC-RS-15, DC-RS-25, DC-RS-50, DC-RS-75) Stainless Steel
DC-13-40C-SS 4″ NPT Stainless Steel (DC-RS-15, DC-RS-100, DC-RS-150, DC-RS-200) Stainless Steel

Features

RS Desiccant Breather Cutaway

By the Numbers

1–Pleated Filter Element
Filter element captures airborne contamination to 1-micron absolute (ß0.3≥1000).

2–Desiccant
Silica gel strips moisture from incoming air. Desiccant can be customized to mitigate a variety of chemicals or fumes.

3–Outside Sight Glass Indicator
Silica gel changes color from blue to light pink when the unit requires component replacement (or rebuilding).

4–Air Vents
Removable stickers keep breather inactive until installation.

5–Integrated Standpipe
Resilient construction provides durability and allows oil mist to coalesce and drain back into the reservoir.

6–Foam Pad
Foam filter captures any large particles and disperses incoming air evenly over filtration and drying areas.

7–Easy-to-Replace Desiccant Bag
Polypropylene bag has handles for easy removal.

8–Rugged Housing
Powder-coated carbon steel or stainless steel housing provides excellent protection against the elements

Applications

  • Bulk Storage
  • Diesel Tank Storage
  • Harsh Environments
  • High Flow Applications
  • Large Hydraulic Reservoirs

Chemical Compatibility

Gasoline
Carbon Steel RS Unit with 100% Molecular Sieve, standard components (gasoline can turn silica gel black, so some customers prefer the molecular sieve instead)

Ethanol
Carbon Steel RS Unit with Viton, Plastisol

Diesel/Biodiesel
Carbon Steel RS Unit with all standard components

Sulfuric Acid
304 Stainless Steel Unit with Viton, Plastisol, No Foam (can combine w/Activated Carbon if caustic fumes are an issue-combos in 25% increments)

Fyrquel (Phosphate Ester)
304 Stainless Steel Unit with EPDM, Plastisol, No Foam

Skydrol (Phosphate Ester)
304 Stainless Steel Unit with EPDM, Plastisol, No Foam

Aqeous Urea
304 Stainless Steel Unit with EPDM gaskets/seals, No Desiccant/Desiccant Bag, Standard Filter (Note: Customer requested no desiccant bags, other customers may want bag)

Hydrogen Peroxide (70%)
304/316 Stainless Steel Unit with Viton, Plastisol, No Foam

Breather Sizing Wizard

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