{"id":2592,"date":"2024-03-05T15:27:30","date_gmt":"2024-03-05T14:27:30","guid":{"rendered":"https:\/\/www.bf-hydraulik.com\/encyclopedia\/breather-filter\/"},"modified":"2026-04-15T10:52:06","modified_gmt":"2026-04-15T08:52:06","slug":"breather-filter","status":"publish","type":"encyclopedia","link":"https:\/\/www.bf-hydraulik.com\/en\/breather-filter\/","title":{"rendered":"Breather Filter"},"content":{"rendered":"\t\t
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Breather Filters for Clean Hydraulic Oil<\/h1>

The breather filter<\/a> is a central component in large hydraulic system<\/a>s. It is used wherever significant fluctuations in oil volume are expected in the reservoir. <\/p>

Breather filter<\/a>s are essential for the operation of hydraulic system<\/a>s. They protect the system from contamination and thus contribute to operational readiness. <\/p>

Breather Filters, Because a Hydraulic System Breathes<\/h2>

During operation, a hydraulic system<\/a> experiences numerous fluctuations in the oil tank. The oil is pumped into various applications as needed and then flows back into the tank. <\/p>

These fluctuations must be pneumatically compensated; otherwise, there is a risk of damage to the hydraulic tank<\/a>, potentially leading to the failure of the entire system.<\/p>

When hydraulic oil is pumped into the system, the same volume of ambient air must flow back into the tank. Otherwise, a dangerous vacuum will form, which can lead to the implosion of the tank. <\/p>

Avoid Unwanted Contaminants Thanks to Breather Filters<\/h3>

Unfortunately, ambient air is not particularly clean; quite the opposite. Working machinery with large hydraulic system<\/a>s, such as excavators, handling equipment, cranes, or telehandlers, already generate a high concentration of fine particles in the immediate vicinity of their hydraulic tank<\/a>s due to their diesel engines. <\/p>

Similarly, the ambient air around working machinery is already heavily laden with suspended particles due to the nature of the work itself. Excavators stir up dust, handling equipment generates many particles when loading bulk materials, and large agricultural machines are exposed to significant amounts of dust. <\/p>

To prevent these microparticles from entering the hydraulic fluid, the ambient air must be filtered. This is where breather filter<\/a>s come into play. <\/p>

More Than Just a Particle Barrier<\/h3>

However, the breather filter<\/a> must also cope with another challenge. Ambient air is always enriched with water vapor. Water should under no circumstances enter the hydraulic tank<\/a>, as it has a doubly damaging effect on hydraulic oil. <\/p>