XR-Series Air Breathers
Extreme Environment Applications

Air Sentry® XR-Series breathers are designed for extreme environment applications where protection from dust, moisture and vibration are critical.
XR-Series breathers include metal bottom caps available with either 1 inch BSPT or 1 inch or 2 inch male NPT threads to adapt to your equipment. The bottom cap is designed to handle the rigors of high vibration applications. The top cap uses two check valves to prevent outside moisture and solid contaminants from entering the breather until there is a need for airflow.
The XR-Series re-buildable design allows for economical replacement of the desiccant cartridge.
Typical applications include:
- Windmills

- Miningequipment
- Farming implements
Case Study
A manufacturing company in the Midwestern United States had an application where a fluid storage tank required 58 cfm (equivalent to 435 gpm) air flow capacity. They were also concerned how often they would have to climb up and change the breather due to its location on top of the tall tank.
The solution was to provide two 35 cfm rated X-Series breathers doubling their capacity to 70 cfm. By combining these breathers and enlarging their mounting adapter we were able to exceed the flow rate requirements. Additionally, the check valve features of the X-Series design solved their additional concerns on how frequently they would have to climb up the tank and change the breather. The check valve feature extends the life of the breather by keeping air out until the tank breathes.
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Sizing Information
| Model |
Height in. (cm) |
Diameter in. (cm) |
Mounting Connection |
Weight lbs. (kg) |
Water Capacity fl.oz (mL) |
Maximum Air Flow cfm |
Maximum Reservoir Fluid Flow cfm |
Type of Medium |
| XR-101 |
8.5 (21.6) |
5.2 (13.2) |
1 inch male NPT |
9.00 (4.1) |
6.2 (183) |
35 |
262 |
100% Silica Gel |
| XR-102 |
11.5 (29.2) |
5.2 (13.2) |
1 inch male NPT |
10.5 (10.5) |
13.9 (411) |
35 |
262 |
100% Silica Gel |
| XR-108 |
14 (35.6) |
5.2 (13.2) |
2 inch male NPT |
12.5 (5.7) |
18.5 (547) |
35 |
262 |
100% Silica Gel |
Replacement Cartridges
| Model |
Height in. (cm) |
Diameter in. (cm) |
Weight lbs. (kg) |
Water Capacity fl.oz (mL) |
Maximum Air Flow cfm |
Maximum Reservoir Fluid Flow cfm |
Type of Medium |
| A-351 |
5 (12.7) |
5 (12.7) |
2.2 (1.0) |
6.2 (183) |
35 |
262 |
100% Silica Gel |
| A-352 |
8 (20.3) |
5 (12.7) |
3.6 (1.6) |
13.9 (411) |
35 |
262 |
100% Silica Gel |
| A-358 |
10 (25.4) |
5 (12.7) |
4.8 (2.2) |
18.5 (547) |
35 |
262 |
100% Silica Gel |
|