Mobile equipment can often operate in rough, sloped environments. When on particularly steep grades, hydraulic fluid can slosh out of the reservoir tank through the standard breather, resulting in loss of oil and contaminating the environment.  HYDAC’s BF Series Filler Breather with Duo Valve (RV) and custom fill neck, allows air to escape the tank, while keeping oil internal to the reservoir. The problem of oil sloshing out of the reservoir tank (environmental and/or cleanliness concerns) is eliminated and costly hydraulic fluid is conserved. The breather utilizes two springs operating on poppets. These are specially designed check valves that allow the tank to breathe in both directions without allowing oil to escape.  Available breather series with the Duo Valve functionality include: ELF, BF and BDE.

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