VV-DV series

Adsorbers of the VV-DV series have a stable valve part and are designed with a disposable replacement cartridge – this ensures effective protection of the system to be aerated as well as simple and quick maintenance.

With the stable and frost-proof valve part, the adsorbers are optimally suited for extreme, dusty ambient conditions. They are used, for example, on hydraulic power units, gearboxes or storage tanks. Due to the large valve cross-sections, pressure build-up is minimal even at high air flows. In addition, this series contains a bed of activated carbon granules and slosh protection to separate escaping oil mist. This ensures cyclical self-regeneration and thus very long maintenance intervals.

Structure and added value

Increase in utilization times through the use of activated carbon

Clean supply air due to integrated 3μm filter

Efficient desiccant with harmless color indicator from orange to green

4Sloshing protection:
Prevents oil droplets from entering the desiccant

Simple replacement of the entire adsorber

Protection against unnecessary loading ensures long periods of use

Method of operation

Adsorption – drying of the supply air

  • Level of the plant decreases
  • Humid air is sucked in
  • Valves open at approx. 5 mbar
  • Uniform flow through the adsorber
  • Air is dried to 2%rH
  • Silica gel changes color
  • Air is filtered to 3μm

Dry and clean supply air

Desorption – Separation of oil particles

  • Level in the plant increases
  • Dry, oily air is squeezed out
  • Activated carbon absorbs oil mist
  • Dry, oil-free air regenerates the silica gel
  • Silica gel partially recolors

Self-regeneration and oil-free exhaust air


Product flyer
Food Conformity Sample
Customs information
EAC Template
REACH Compliant
IP Protection Class IP 63
RoHS Compliant
Corrosivity Class C5
CE Conformity
CAD data and more files on request

Technical Data


The sucked-in air opens the valves in the lower part of the adsorber already at approx. 5 mbar. After flowing into the adsorber, the air is distributed evenly over the cross-section. The pre-filter disk frees the air from coarse dirt particles already at this point.

When the desiccant silica gel flows through, the water molecules are reliably removed from the air. The gap volume of the granulate is optimally selected with 2 to 5 mm grains and guarantees a minimum pressure build-up with simultaneous very good drying efficiency. Thus, at the beginning of the drying process, a residual air humidity of max. 2 % rH and a dew point of -40 °C are achieved. Due to the water absorption, the silica gel in the standard turns from orange to green, indicating the end of the product life cycle. At the end, a 3 µm filter ensures that all dirt particles are separated from the ambient air and the silica gel and that the connected system is not contaminated.

In the case of the outgoing air, the two-stage slosh protection prevents larger oil droplets from penetrating the desiccant. This is supplemented by the activated carbon, which adsorbs the finest oil particles and thus enables the adsorber to regenerate itself.

Adsorbers of the VV-DV series are made of polycarbonate, polyamide, silica gel orange, FKM and can be used for aeration of all common hydraulic and gear oils and lubricants, fuels, isocyanates.

Pressure ratio