Limited Space Applications
Typical Applications
- Gearboxes
- Drums
- Totes
- Small Oil Containers

Air Sentry® Z-Series breathers are designed for applications where space is limited or air flow requirements are below 10 cubic feet per minute (cfm).
The Z-Series is typically used on gearboxes and low fluid volume applications where mounting space is limited or where a larger breather won't fit without remote mounting.
For applications with excessive oil fumes, use the Z-Series breather with the VaporSentry™, an oil coalescing adapter. VaporSentry's design utilizes a finned surface area to collect oil mist / fumes from the gearbox, turn the mist into heavier droplets and gravity drain them back to the gearbox. This helps block oil from entering the breather and interrupting the moisture adsorbing properties of the silica gel.
| Model | Height | Diameter | Mounting Connection |
Silica Gel | Carbon Weight |
Maximum Adsorption Capacity |
Maximum Air Flow |
Maximum Reservoir Fluid Flow |
Type of Medium |
|---|---|---|---|---|---|---|---|---|---|
| Z-131 | 2 in 5.1 cm |
2 in 5.1 cm |
1/2" FNPT | 0.08 lbs 0.04 kg |
0.49 fl oz 14 mL |
10 cfm | 75 gpm | 100% Silica Gel | |
| Z-132 | 3.25 in 8.3 cm |
2 in 5.1 cm |
1/2" FNPT | 0.1 lbs 0.05 kg |
0.92 fl oz 27 mL |
10 cfm | 75 gpm | 100% Silica Gel | |
| Z-133 | 2 in 5.1 cm |
3.25 in 8.3 cm |
1/2" FNPT | 0.3 lbs 0.1 kg |
1.84 fl oz 54 mL |
10 cfm | 75 gpm | 100% Silica Gel | |
| Z-134 | 3.25 in 8.3 cm |
3.25 in 8.3 cm |
1/2" FNPT | 0.5 lbs 0.2 kg |
3.06 fl oz 90 mL |
10 cfm | 75 gpm | 100% Silica Gel | |
| Z-135 | 5.5 in 14.0 cm |
3.25 in 8.3 cm |
1/2" FNPT | 0.8 lbs 0.4 kg |
4.91 fl oz 145 mL |
10 cfm | 75 gpm | 100% Silica Gel | |
| Z-231 | 2 in 5.1 cm |
2 in 5.1 cm |
1/2" FNPT | 0.5 lbs 0.2 kg |
3 cfm | 22 gpm | 100% Activated Carbon | ||
| Z-232 | 3.25 in 8.3 cm |
2 in 5.1 cm |
1/2" FNPT | 0.09 lbs .04 kg |
3 cfm | 22 gpm | 100% Activated Carbon | ||
| Z-233 | 2 in 5.1 cm |
3.25 in 8.3 cm |
1/2" FNPT | 0.2 lbs 0.1 kg |
3 cfm | 22 gpm | 100% Activated Carbon | ||
| Z-234 | 3.25 in 8.3 cm |
3.25 in 8.3 cm |
1/2" FNPT | 0.4 lbs 0.2 kg |
3 cfm | 22 gpm | 100% Activated Carbon |











