Breather Filters


For optimal performance of your equipment hydraulic and lubricating oils should be kept free from solid and water contamination. However most fluid reservoirs must breathe to function, allowing water vapour and solid contaminants to enter. Temperature fluctuations in the reservoir will cause this water vapour to condense which will not only cause oxidation of the oil, but can also lead to considerable mechanical damage.

Filtration and dehydration: a single process

Standard air breathers remove some of the solid particles, but allow water vapour to pass freely. The air is dried by passage through a column packed with ZR gel granules. The dried air is subsequently filtered with the use of a pleated synthetic fibre filter element (replaceable spin-on type) that removes solid particles (down to 3μ). This process prevents contamination and oxidation of the oil and components, resulting in a prolonged service life of the oil and equipment and less down time. Reducing the total cost of ownership for your equipment.

Serviceable and non-toxic

All desiccant breathers are completely serviceable. Due to the humidity indicator granules it is very easy to monitor the saturation status of the ZR gel granules. The indicator granules change colour, turning form ruby-red (active) to a light orange (replace).  The performance of the synthetic fibre filter (spin-on) can also be monitored by an optional ‘filter minder’. 

Active coal

Desiccant breathers can be fitted with a combination of ZR gel granules and active coal. This activated carbon will eliminate the oil smell and vapour. Besides this it will prevent the ZR gel granules from being contaminated with oil damp.

Atmospherically closed

Optional check valves can be added for dehydration of gearbox applications. These spring loaded (0,01 bar) check valves are fitted in opposing directions, opening only whilst inhaling or exhaling. This prevents atmospheric contact between the air and the ZR gel granules under static conditions, increasing the lifetime of the drying agent.

Easy mounting

The desiccant breathers are compatible with almost all hydraulic and lubricating fluids applications, because of the wide variety of mounting plates.


  • Reduces cost of ownership
  • Reduces oxidation of the oil and bearing surfaces
  • Prolongs the life of the equipment and oil (additive package)
  • Minimizes equipment downtime

Our range of desiccant breathers is suited for dehydrating hydraulic power units, lubrication and hydraulic oil tanks, storage drums, gearboxes, diesel fuel tanks and storage tanks for hygroscopic biodegradable fluids.