Desiccant Breathers Protect Diesel Fuel Storage Reservoirs, Gearboxes, Pumps and other Industrial Equipment from Moisture and Particulate
Gearboxes, reservoirs and pumps all “breathe” in use. As air contracts or expands or as entering fluid displaces air in a system, outside air is drawn in from the atmosphere. Unfortunately, this breathed-in air has water and particulate that will accumulate to contaminate your system.
A desiccant breather is a straightforward solution to the problem, blocking moisture and particles from entering. Testing of leading competitors has shown that Swift-Dri Desiccant Breathers average almost 20% greater moisture-retention capacity versus leading brands.
Our unique design features a longer body, which permits 10% greater volume of silica gel desiccant beads when compared to leading competitors.
Advanced Silica Gel
Desiccant removes water from air prior to it entering your system, tank or equipment.
Built-in Status Indication
Desiccant gel changes color from blue to pink to indicate that it is removing moisture, as well as when to replace the breather.
Step Up to Superior Protection
This breather unit is a marked improvement over the customary dust caps or OEM breathers on equipment. When contaminated air enters the top of the breather, it passes through layered filter media, preventing solid particles from entering the breather and causing undue wear to your equipment surfaces. Filtered air passes through a bed of Swift-Dri™ silica gel, which removes harmful moisture from the air. The silica beads also work to attract moisture from inside the equipment reservoir during service or shut-down, keeping the equipment dry. The addition of check-valves in our CV breather is ideal for low-flow and intermittent operations in high humidity conditions.
Optional Check Valves
Our CV models have check valves to isolate equipment from high humidity ambient conditions, prolonging breather life.
Specifications, Adaptors and Sizing Guidelines
 Standard Model: SFD-005 Check Valve Model: SFD-005-CV |
| Connection: 3/8" Sure-Fit (NPT, BSPP, BSPT) |
| Height: 4.30" (10.92 cm) |
| Width: 2.52" (6.40 cm) |
| Diameter: 2.35" (6.00 cm) |
| Stem Height: 0.5" (1.27 cm) |
| Silica Gel: 80 g |
| Max Moisture Retention: 1.0 fl. oz. (28 ml) |
| Max Airflow at 1-PSID Standard Model: 7 cfm (1981 pm) Check Valve Model: 5 cfm (1421 pm) |
| Particulate Retention: 3μ[c} >1000 |
 Standard Model: SFD-010 Check Valve Model: SFD-010-CV |
| Connection: 3/8" Sure-Fit (NPT, BSPP, BSPT) |
| Height: 5.80" (14.73 cm) |
| Width: 2.52" (6.40 cm) |
| Diameter: 2.35" (6.00 cm) |
| Stem Height: 0.5" (1.27 cm) |
| Silica Gel: 150 g |
| Max Moisture Retention: 2.0 fl. oz. (60 ml) |
| Max Airflow at 1-PSID Standard Model: 7 cfm (1981 pm) Check Valve Model: 5 cfm (1421 pm) |
| Particulate Retention: 3μ[c} >1000 |
 Standard Model: SFD-020 Check Valve Model: SFD-020-CV |
| Connection: 1" Sure-Fit (NPT, BSPP, NPSM) |
| Height: 6.24" (15.85 cm) |
| Width: 4.10" (10.41 cm) |
| Diameter: 3.84" (9.75 cm) |
| Stem Height: 1.25" (3.175 cm) |
| Silica Gel: 360 g |
| Max Moisture Retention: 4.8 fl. oz. (142 ml) |
| Max Airflow at 1-PSID Standard Model: 18 cfm (5101 pm) Check Valve Model: 10 cfm (2831 pm) |
| Particulate Retention: 3μ[c} >1000 |
 Standard Model: SFD-030 Check Valve Model: SFD-030-CV |
| Connection: 1" Sure-Fit (NPT, BSPP, BSPT) |
| Height: 8.44" (21.27 cm) |
| Width: 4.10" (10.41 cm) |
| Diameter: 3.84" (9.75 cm) |
| Stem Height: 1.25" (3.175 cm) |
| Silica Gel: 640 g |
| Max Moisture Retention: 8.9 fl. oz. (264 ml) |
| Max Airflow at 1-PSID Standard Model: 18 cfm (5101 pm) Check Valve Model: 10 cfm (2832 pm) |
| Particulate Retention: 3μ[c} >1000 |
 Standard Model: SFD-040 Check Valve Model: SFD-040-CV |
| Connection: 1" Sure-Fit (NPT, BSPP, BSPT) |
| Height: 10.54" (26.78 cm) |
| Width: 4.10" (10.41 cm) |
| Diameter: 3.84" (9.75 cm) |
| Stem Height: 1.25" (3.175 cm) |
| Silica Gel: 980 g |
| Max Moisture Retention: 14.3 fl. oz. (424 ml) |
| Max Airflow at 1-PSID Standard Model: 18 cfm (5101 pm) Check Valve Model: 10 cfm (2832 pm) |
| Particulate Retention: 3μ[c} >1000 |
General Sizing Guidelines
Recommended Maximum Volume
| Gearbox or Fluid Storage Tank | Hydraulic Reservoir | |
|---|---|---|
| SFD-005 SFD-005-CV | 18 gal / 68 L | 2.5 gal/ 9 L |
| SFD-010 SFD-010-CV | 42 gal / 160 L | 6 gal / 23 L |
| SFD-020 SFD-020-CV | 240 gal / 900 L | 72 gal /270 L |
| SFD-030 SFD-030-CV | 420 gal / 1600 L | 120 gal / 450 L |
| SFD-040 SFD-040-CV | 600 gal / 2300 L | 240 gal / 900 L |
The data above provides a starting point to select a breather model for your application. Factors impacting the service life of a given unit include: flow rate, breathing volume & frequency, environmental humidity, temperature, among others.
Reservoir Adapters
| Element Connection | Reservoir Connection | ||
|---|---|---|---|
 | SFBA-1000 | 1" NPT | Bayonet |
 | SFBA-1100 | 1" NPT | Flange 6 ANSI Mounting Holes |
 | SFBA-1200 | 1" Slip Fit | 1"-12 UNF |
 | SFBA-1300 | 1" FNPT | 1" FNPT |
 | SFBA-1400 | 1" FNPT | 2" MNPT |
 | SFBA-1500 | 1" FNPT | 3/4" MNPT |
Materials
| Body | Moisture Absorbing Media | Filter Media | Operating Temperatures |
|---|---|---|---|
| ABS, Nylon Polypropylene, Buna | Silica Gel | Polyester Polyurethane | -20°F to 200°F -29°C to 93°C |