GUARDIAN BREATHERS

Ideal for most Applications

Guardian series desiccant breathers Air Sentry

The GUARDIAN series is Air Sentry’s most advanced breather range, offering superior protection for industrial equipment. Engineered for durability and customisation, GUARDIAN breathers help extend the life of your machinery by preventing moisture and contaminants from entering critical systems.

Innovative Design for Maximum Protection
Select models feature an isolation check valve, preventing exhaust air from depleting the desiccant while shielding against volatile fumes and splashing fluids. This ensures optimal performance and longevity in demanding environments.

Built to Last
Constructed from Tritan®, a patented, impact-resistant material, GUARDIAN breathers offer exceptional chemical resistance and can withstand extreme temperatures. The recyclable Tritan® casing provides enhanced durability, reducing replacement frequency and lowering overall maintenance costs.

Guardian

Customisable for Your Application
GUARDIAN’s modular design allows for flexible configuration to meet your specific needs. Available add-ons include:
✔ Isolation check valve – Prevents unnecessary desiccant depletion
✔ Stackable design – Expands filtration capacity
✔ Wash-down cap – Provides extra protection in harsh environments
✔ Compound indicating gauge – Monitors performance in real-time
✔ High-capacity HEPA filter – Enhances air purity for sensitive applications

Designed for longer service life and reduced downtime, GUARDIAN breathers give you the reliability and flexibility to protect your most valuable industrial assets.

The Guardian

Isolation Check valves and
Tritan-casing equate to a longer life
for Breather and Equipment.

Applications:

Ideal for most applications.

The Guardian is the only desiccant breather series that Air Sentry recommends for diesel fuel applications* (noIt recommended for other fuel applications)

*Guardian breathers used on diesel fuel applications must be accompanied with an isolation check valve. See Guardian models ending in NC, NG, NGC. Not available in models ending in N.

Base Material:

100% Silica Gel

Cartridge Length:

5”, 8” and 12”

Guardian-series desiccant breathers Air Sentry

Specification:

Check Values (8): In/Out 0.1 PSI

Particle Filter: 2 mu absolute | cartridge top/bottom

Mounting Connection Female: 1” NPT, 2”NPT, 1”BSP

Maximum Air Flow: 25 cfm

Maximum Fluid Flow: 187 gpm

Replacement Cartridges: 5”, 8”, 12”

Medium: silica gel, molecular sieve, activate carbon

Ring Seals: Top Cap and Base

Compound Pressure Gauge: Optional

Isolation Check Valve: Optional (recommended)

Construction Material: Tritan®

Guardian Models

Large size Guardian Air Sentry

Guardian Part Number Structure

The part number should be seen as a logical identifier of a particular part design. The purpose is to simplify reference to that part. Explanation on building a Guardian part number with the help of the Guardian Selector Tool.

Example: part nr. G5S1NGC

The Guardian Selector Tool

In plain words part nr. G5S1NGC means: a Guardian breather with a cartridge length of 5", of which the cartridge is filled with silica gel, the thread size is 1" NPT and it is equipped with the optional compound gauge and isolation check valve.

Some of the unique features of the Guardian

4 Check Valves

Four check valves in the top cap, open at 0.1 PSI, providing redundant air flow into the reservoir. Four check valves in the base, open at 0.1 PSI, allowing exhausting air to by-pass a reverse path through the silica gel

Optional Isolation Check Valve

The optional Isolation Check Valve provides maximum protection for the silica gel.

Exhausting air flowing from a fluid reservoir may carry oil mist, heavy vapors or bring moisture from contaminated oil. The Check Valve acts as a barrier to splashing fluids.

Modular Stackable Ring*

By using the Modular Stackable Ring, you are able to attach GUARDIAN breather cartridges to extend the service life. This Stackable Ring also allows for the addition of the High-Capacity Air Filter and Activated Carbon Filter.

Aluminum Mounting Ring

The aluminum mounting ring is molded into the base for strength and vibration resistance. Mounting connections include 1”NPT, 2”NPT and 1”BSP.

Shield Wash Down Cap

The Guardian™ Shield prevents wind, rain, or high pressure spray (wash-down) from opening check valves in the top cap. It also works well on mobile equipment, in extremely dirty or dusty environments. It’s easy to install on the Guardian™, X Series or XR Series.

Compound Vacuum / Pressure Gauge

The optional Integrated Compound Vacuum / Pressure Gauge provides a constant visual indicator of airflow performance

High Capacity Air Filter

GUARDIAN's High-Capacity Air Filter can be used with a desiccant cartridge or as a standalone particle filter. Its 0.3-micron HEPA filter is 99.7% efficient. Ideal for extremely dirty/dusty environments.

Customise your breather with a Stack Ring Adapter.

The additional cartridge you can add, may contain silica gel, activated carbon or molecular sieve.

These secondary agents protect equipment from:

caustic fumes,
extend the performance range or
increase the life of a desiccant breather.

Connecting two cartridges of similar size reduces air flow 50%.

Activated Carbon

Molecular Sieve

Silica gel

Manifold Adapter Kit

The Manifold Adapter Kit (Part nr. A630) comes with a 1" MNPT and allows mounting of up to 4 breathers on one piece of equipment. Mounting multiple units produces greater airflow resulting in less frequent breather replacements. Made of heavy duty anodized aluminum for years of service in harsh environments.

The Manifold Adapter Kit is recommended when a reservoir's air flow requirement exceeds the CFM rating of a single desiccant breather.

The Manifold Adapter Kit supports the combined air flow of up to four 1” mounted breathers.

manifold

Selecting the right model

When it comes to selecting breathers, the “one size fits all” approach is not really ideal. It is quite a job to find your way in all the different designs available today. But Breather selection is an important part of the process of developing a world-class lubrication program and should not be oversimplified.

Breather selector

Key Factors to consider when choosing a Desiccant Breather:

Determine CFM requirement:

Select a model that exceeds a reservoir's air flow requirement (CFM). Include a margin of safety.

Choose the Right Series:

Consider the environment; select a model that best fits the challenges of the application. Environment examples - vibration, mobile equipment, high humidity and extreme dust.

Determine Connection Size:

Identify the breather mounting location; the best location is often the exiting vent Select a model with a similar mounting connection. If necessary, it’s ok to us an adaptor / reducer. Be careful not to restrict airflow.

Evaluate Mounting Area:

Evaluate the available space for the breather. If space is limited or other issues apply (heat, oil mist, vibration, etc.), remote mount the breather. Remote mount using extension pipes, hoses, adapters etc.