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Watchdog Desiccant Breathers

Watchdog Desiccant Breathers are a unique particle filtration and water-removal system. They prevent destructive contaminants from entering industrial equipment as air is breathed in and out due to thermal expansion or fluid level changes. By allowing only clean, dry air into industrial equipment, the Watchdog Desiccant Breathers prolong fluid life, reduce abrasive wear, and decrease downtime and repair costs.

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Additional Features

Water Vapor Adsorbent
The silica gel used in the Watchdog Desiccant Breathers adsorbs up to 40% of its own weight.
Visual Indication
When maximum adsorption is reached, the silica gel turns from orange to dark green, indicating replacement is needed. The silica gel used is chemically inert, non-corrosive, and does not contain cobalt chloride, a heavy metal.
Dual Filtration System
A two-micron filter (99% efficiency) is located at the top and bottom of the silica gel bed. The top filter removes particle contamination from atmospheric air and the bottom helps with dust created by the silica gel beads contacting each other.
Activated Carbon
As air is expelled, it passes through activated carbon which removes oil vapors, fumes, and odors (except for part numbers 39131, 39132, 39133, and 39134).
Bi-Directional Air Flow
A 360º air flow allows air to be breathed in and out as fluid level changes or differential pressures occur. Expelled air “backflushes” the particulate filter to prolong the life of the breather.
Durable Construction
Watchdog Desiccant Breathers are manufactured from rugged ABS plastic and impact modified acrylic.
Environmentally Safe
The color-changing dye used is environmentally safe and meets all health and safety requirements.

Other Specs

Model Description Air Flow (WDB) Water Capacity (WDB) Height Dia Connection Fluid Volume Exchange Silica Gel Volume
39101 Breather 20 CFM .4 lb 6.25 in 5 in 1" Male Friction Fit 150 gpm 1.4 lb
39102 Breather 20 CFM .9 lb 9.25 in 5 in 1" Male Friction Fit 150 gpm 2.7 lb
39108 Breather 20 CFM 1.3 lb 11.25 in 5 in 2" Male NPT 150 gpm 3.5 lb
39131 Breather 5 CFM .032 lb 2 in 2 in 1/2" Female NPT 37 gpm .08 lb
39132 Breather 5 CFM .056 lb 3.25 in 2 in 1/2" Female NPT 37 gpm .1 lb
39133 Breather 5 CFM .104 lb 2 in 3.25 in 1/2" Female NPT 37 gpm .3 lb
39134 Breather 5 CFM .18 lb 3.25 in 3.25 in 1/2" Female NPT 37 gpm .5 lb

Desiccant Breathers