Fleetguard, a brand of Atmus Filtration Technologies, released its new high-efficiency air breather, a desiccant filter ideal for bulk fluid storage tank applications.

As air flows in and out of a storage unit or system, fluid tanks and machinery reservoirs are often susceptible to moisture and debris ingress that contaminates the supply source and the unit itself. Desiccant breathers are designed to replace standard tank-installed vents and filters during system operation and shutdown.

Capturing Moisture with Desiccant Air Breathers

Composed of silica gel beads, polyurethane foam, and high-efficiency media, desiccant air breathers work to capture moisture and other harmful contaminants in fluid tanks from particle intrusion. Ultimately, this reduces unplanned equipment downtime, lowers equipment operating costs, and extends the service life of a system’s fluid by keeping it cleaner.

“The silica gel in our air breathers absorbs moisture and prevents the damaging results of any moisture entering and exiting the fluid storage system,” said John Scheuren, technical advisor at Atmus Filtration Technologies.

Micro-Glass Filtration Media & Check Valves

Fleetguard standard and extended-life breathers also include dual-phase micro-glass filtration media, offering dirt-holding capabilities and low-pressure drop for small to large storage tanks.

Additionally, all air breathers are available with optional check valves, which provide greater protection while simultaneously extending breather life.

Extended-life breathers are offered with optional inflow-only check valves, which are typically needed for larger reservoirs that are part of an active system and require higher airflow. This valve type requires the use of a flow adaptor to provide outward flow.

“Depending on the working environment, a check valve may be important in extending the life of a desiccant air breather,” said Scheuren. “Check valves facilitate airflow only when the system truly needs it. In high-moisture environments, a check valve will prevent continuous airflow, providing protection against airborne contamination and higher levels of humidity.”

Determining the Correct Filter Size

The Fleetguard website offers a sizing tool to help customers more easily determine the appropriate desiccant air breather filter. Customers can input details regarding reservoir size, maximum airflow rate, and humidity levels to determine which filter is suitable for which system or unit.

When Do You Change Air Breathers?

Air breathers should be replaced when the silica gel has changed color, at least once per year, or if noticeable back pressure increases are evident. They are not suitable for high vibration, extreme low—or high-temperature environments, or systems with high alkalinity or acidity.