Air Sentry Desiccant Breathers
Hydraulic Breather Filter Options for Every Reservoir
Filter Process & Supply supplies Air Sentry desiccant breathers that block moisture and 2 micron dirt from entering hydraulic and lube tanks.
- Silica gel turns gold to dark green when it is spent
- Rebuildable models on XR, R, X and M Series
- Fits stationary tanks, gearboxes and off-road fleets
Complete filtration line, from HVAC filters to final membrane filtration.
Prefer to talk? Call 732.329.2500
Request Breather Pricing
Tell us about your reservoir and we will match the right breather.
Why buyers choose these breathers
Keeps water out of oil
Silica gel desiccant pulls moisture from the air pulled into the reservoir as fluid levels change.
See when to change it
The silica gel turns from gold to dark green, so techs can check status at a glance.
Check valves extend life
Isolation, intake and exhaust check valves across the series help desiccant last longer.
A series for every spot
Guardian, D, Z, XR, R, L, M, X and Vapor Sentry cover tight spaces, vibration and harsh sites.
Rebuild instead of replace
XR, R, X and M Series use replaceable desiccant cartridges to cut cost per change.
Help picking the right size
Tell us airflow, port size and environment. We match the model and can set up stocking for just-in-time delivery.
Air Sentry breather series we supply
Every time a hydraulic reservoir breathes, it can pull in humid, dirty air. A desiccant breather filters that air and dries it before it reaches your oil. Filter Process & Supply stocks and quotes the full Air Sentry line so you can standardize across your plant or fleet.
Not sure which model fits? Send us the application and we will help you choose. We also offer filter consolidation and filter process analysis to trim the number of part numbers you carry.
- Guardian Series: first breather built of Tritan with isolation check valve, compound vacuum/pressure gauge and stackable Modular Stack Ring
- D-Series: 2 micron particle filtration, airflow up to 20 cfm, industrial grade ABS caps for stationary fluid management
- Z-Series: below 10 cfm for gearboxes and low fluid volume spots with limited mounting space
- XR-Series: metal reinforced base with male NPT threads and two check valves for high dust, moisture and vibration
- R-Series: steel pipe threads for high vibration off-road, construction, haul and farm vehicles
- L-Series: 2 micron filtration in standard and activated carbon versions for in-line air, low pressure compressed air and vacuum lines
- M-Series: 2 micron pleated filters with Splash Sentry device for heavy-duty tanks in severe conditions
- X-Series: intake check valve at 0.3 psi and exhaust at 2.1 psi for closed-system protection
- Vapor Sentry: oil mist and vapor control on equipment vents
Filtration is all we do
“The staff and owner of fps were easy to work with and very knowledgeable. I highly recommend this company.”
What happens next
Send your details
Share the reservoir type, port size, airflow and the environment the breather will sit in.
We match a model
Our team recommends the Air Sentry series and size that fits your application and budget.
You get a quote
We send pricing on request, plus options for rebuild cartridges and just-in-time stocking.
Frequently asked questions
How much does a hydraulic breather filter cost?
Pricing is available on request. Cost depends on the series, size, thread connection and quantity, so we quote each job.
Which breather fits my reservoir?
It depends on airflow and conditions. D-Series handles up to 20 cfm on stationary tanks, Z-Series suits gearboxes under 10 cfm and tight spaces, R-Series is built for high vibration vehicles, and XR-Series handles high dust and moisture.
How do I know when to change the breather?
The silica gel changes from gold to dark green as it takes on moisture. When it is dark green, the desiccant is saturated.
Can I replace just the desiccant?
Yes on the rebuildable series. XR, R, X and M Series use replaceable desiccant cartridges. The Guardian Series uses a stackable cartridge design with the Modular Stack Ring.
Do you sell to companies outside your area?
Yes. Air Sentry desiccant breathers are served across the USA. Tell us your ship-to location when you request a quote.
Can you help us cut the number of filter part numbers we stock?
Yes. We offer filter consolidation, filter process analysis and reduction, and stocking arrangements for just-in-time delivery.
Get pricing on your hydraulic breather filter
Tell us your reservoir, port size and conditions. We will match the right Air Sentry series and send a quote. Call 732.329.2500 or use the form.
- Silica gel turns gold to dark green when it is spent
- Rebuildable models on XR, R, X and M Series
- Fits stationary tanks, gearboxes and off-road fleets
Prefer to talk? Call 732.329.2500