Tank / Reservoir Breathers

Breathers are available in a variety of styles, materials and sizes. Breathers provide clean airflow into reservoirs and other storage containers where there is an exchange of air during changing fluid levels. In high moisture environments or applications with large changes in machine attitudes, breather caps with pressure relief and vacuum breakers limit air exchange and provide a positive suction head at the pump inlet.

T.R.A.P. Breather Technology from Donaldson® New Fast-Acting Breather Eliminates Moisture From Hydraulic Reservoirs...

Maintenance Tips

Change the filter after each 500 hours of operation. More frequent replacement may be required when operating in heavily contaminated areas, and on mobile equipment. Under such conditions, Donaldson recommends replacement every 250 hours

Tank/Reservoir Level Gauges

Features

To accurately monitor the oil level in your tanks and reservoirs, choose Donaldson level gauges. Three models indicate oil level and temperature, 35º to 210ºF (30º to 90ºC). Two models indicate oil level only.

Transparent lens material is protected by metal bar with BunaN seals.

Maximum working pressure for all models is 14.5 psi / 1 bar / 100 kPa for pressurized tanks.

Recommended bolt tightening torque is 10 lbs-ft, with inside nut for tightening directly on the tank.

Suggested mounting hole diameter: 11mm or 13mm.

Filler Breather Assemblies

Features

Removable 500µm mesh strainer. (Except model P171848, which has a nonremovable strainer.)

10µm air breather/filter.

Models P171855 & P171848 include drilled flanges with attaching screws. P171856 without pre-drilled holes P171859 with weldable flange.

How They Work

As fluid levels rise and fall inside the reservoir, air flows in and out through the strainer and breather as shown below. The breather filter inside the cap removes contaminants as small as 10µm from the air to keep airborne contaminant from entering the fluid. The strainer removes large particles from fluid as it is added to the reservoir.

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