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.

Explore the Rebuildable Steel Breather

Product Specs
DC-RS-3

DC-RS-5

DC-RS-9

DC-RS-15

DC-RS-25

DC-RS-50

DC-RS-75

DC-RS-100

DC-RS-150

DC-RS-200
Unit Height (in / mm) 11.5 / 292 13.75 / 349 18.25 / 464 19.25 / 489 22.5 / 571 31.25 / 794 39.75 / 1010 31 / 787 36.75 / 933 42.75 / 1086
Unit Diameter (in / mm) 10.13 / 257.2 10.13 / 257.2 10.13 / 257.2 15.5 / 393.7 15.5 / 393.7 15.5 / 393.7 15.5 / 393.7 23.5 / 596.9 23.5 / 596.9 23.5 / 596.9
Connection Size 2" 2" 2" 3" 3" 3" 3" 4" 4" 4"
Amount of Silica Gel (lbs / kg) 3 / 1.36 5 / 2.27 9 / 4.08 15 / 6.80 25 / 11.34 50 / 22.68 75 / 34.02 100 / 45.36 150 / 68.04 200 / 90.72
Max. Flow Rate (cfm) 85 @ 0.5 psid 85 @ 0.5 psid 80 @ 0.5 psid 205 @ 0.5 psid 140 @ 0.5 psid 115 @ 0.5 psid 80 @ 0.5 psid 270 @ 0.5 psid 250 @ 0.5 psid 240 @ 0.5 psid
Max. Flow Rate (lpm) 2407 2407 2265 5805 3964 3256 2265 7645 7079 6796
Filter Efficiency 1µ absolute (β₁≥1000) 1µ absolute (β₁≥1000) 1µ absolute (β₁≥1000) 1µ absolute (β₁≥1000) 1µ absolute (β₁≥1000) 1µ absolute (β₁≥1000) 1µ absolute (β₁≥1000) 1µ absolute (β₁≥1000) 1µ absolute (β₁≥1000) 1µ absolute (β₁≥1000)
Operating Temp. Range (°F) -20° to 220° -20° to 220° -20° to 220° -20° to 220° -20° to 220° -20° to 220° -20° to 220° -20° to 220° -20° to 220° -20° to 220°
Operating Temp. Range (°C) -29° to 104° -29° to 104° -29° to 104° -29° to 104° -29° to 104° -29° to 104° -29° to 104° -29° to 104° -29° to 104° -29° to 104°
Model Max. Airflow at 1 psid  Recommended Max. Volume
Storage Tank Hydraulic Reservoir
DC-RS-3 85 cfm / 2407 lpm 800 gal / 3028 L 400 gal / 8 L 
DC-RS-5 85 cfm / 2407 lpm 1300 gal / 4921 L  600 gal / 19 L 
DC-RS-9 80 cfm / 2265 lpm  2400 gal / 9085 L  1200 gal / 227 L 
DC-RS-15 205 cfm / 5805 lpm  4000 gal / 15142 L 1800 gal / 379 L 
DC-RS-25 140 cfm / 3964 lpm 7000 gal / 26498 L Contact Des-Case
DC-RS-50 115 cfm / 3256 lpm 14000 gal / 52996 L Contact Des-Case
DC-RS-75 80 cfm / 2265 lpm 21000 gal / 79494 L Contact Des-Case
DC-RS-100 270 cfm / 7645 lpm 30000 gal / 113562 L Contact Des-Case
DC-RS-150 250 cfm / 7079 lpm 50000 gal / 189271 L Contact Des-Case
DC-RS-200 240 cfm / 6796 lpm 75000 gal / 283906 L 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.

APPLICATIONS

  • Bulk Storage
  • Diesel Tank Storage
  • Harsh Environments
  • High Flow Applications
  • Large Hydraulic Reservoirs
Below are some requested customized RS units.

Please note: Each one is specific to a particular application and customer requests. Please use as a guideline only.

RS APPLICATION RECOMMENDATION
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

As air is drawn into equipment through the breather, the pleated filter element removes solid particulate while the desiccant extracts moisture. While in service or during shutdown, the desiccant beads attract moisture from inside the equipment reservoir, actively drying the equipment.

RS Sight Glass

Seeing Pink?

The sight glass on the RS unit gives indication to the saturation of the desiccant inside the bags.  When the blue desiccant turns pink, it means it has done its job and is saturated with moisture, keeping it out of your lubricants. It's time to order the rebuild kits.

Steel Adapters
Description Part Number
1" NPT DC-13-4C
2" NPT (DC-RS-3, DC-RS-5, DC-RS-9) DC-13-6C
3" NPT (DC-RS-15, DC-RS-25, DC-RS-50, DC-RS-75) DC-13-10C
4" NPT (DC-RS-15, DC-RS-100, DC-RS-150, DC-RS-200) DC-13-40C
Stainless Steel Adapters
Description Part Number
1" NPT Stainless Steel DC-13-4C-SS
2" NPT Stainless Steel (DC-RS-3, DC-RS-5, DC-RS-9) DC-13-6C-SS
3" NPT Stainless Steel (DC-RS-15, DC-RS-25, DC-RS-50, DC-RS-75) DC-13-10C-SS
4" NPT Stainless Steel (DC-RS-15, DC-RS-100, DC-RS-150, DC-RS-200) DC-13-40C-SS
Download Adapters & Accessories Brochure

 

Rebuildable Steel Rebuild Kits
  Description Part Number
Rebuild kit includes desiccant bags, microglass filter, sight glass, gaskets, and foam Rebuild Kit for DC-RS-3 DC-RS-3-RK
Rebuild Kit for DC-RS-5 DC-RS-5-RK
Rebuild Kit for DC-RS-9 DC-RS-9-RK
Rebuild Kit for DC-RS-15 DC-RS-15-RK
Rebuild Kit for DC-RS-25 DC-RS-25-RK
Rebuild Kit for DC-RS-50 DC-RS-50-RK
Rebuild Kit for DC-RS-75 DC-RS-75-RK
Rebuild Kit for DC-RS-100 DC-RS-100-RK
Rebuild Kit for DC-RS-150 DC-RS-150-RK
Rebuild Kit for DC-RS-200 DC-RS-200-RK
  • 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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