VV-R series

Adsorbers of the VV-R series are cost-effective solutions without valves. Due to the low differential pressure, this adsorber can also be used to ventilate plastic tanks without any problems. The adsorbers of this series are filled with 0.1 to 4.6 kg silica gel and thus have a water absorption capacity of up to 1.84 l. A 3μm filter is used to additionally purify the air drawn in. A layer of activated carbon adsorbs oil mist and protects the desiccant and the environment from contamination.

The VV-R adsorbers are refillable and can be filled with fresh desiccant within a few minutes. The possibility of replacing desiccant and wearing parts, leads to very favorable operating costs. The use of a refillable version is particularly useful for systems with a permanent air exchange and a related shorter service life.

Structure and added value

Refillable version ensures favorable operating costs

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

5Sloshing protection:
Prevents oil droplets from entering the desiccant

Method of operation

Adsorption – drying of the supply air

  • The level in the system decreases
  • Humid air is sucked in
  • Air flows pressureless into adsorber
  • 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

  • The level in the system 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 C4
CE Conformity
CAD data and more files on request

Technical Data


The sucked air flows into the adsorber almost without pressure. After flowing into the adsorber, the air is distributed evenly over the cross-section. The prefilter disc frees the air from coarse dirt particles.

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 very good drying efficiency at the same time. 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 changes color from orange to green. A complete green coloration indicates the end of the product life cycle. The 3 µm filter ensures that all dirt particles are separated from the ambient air and the silica gel and that the connected plant is not contaminated.

In the case of outflowing air, the two-stage slosh protection prevents larger oil droplets from penetrating the desiccant. The activated carbon adsorbs the finest oil particles and thus enables the adsorber to regenerate itself.

These adsorbers are made of polycarbonate, polyamide, aluminum, silica gel orange, FKM and can be used for aeration of all common hydraulic and gear oils and lubricants, fuels, isocyanates.

Pressure ratio

Spare part kits

Sustainability starts with using product components for as long as their life cycle allows and replacing only those components that show signs of wear. With our spare parts kits for the refillable adsorber series, we ensure that you can replace each individual component of an adsorber as needed.

For example, the desiccant in our adsorbers becomes loaded during use, increasingly loses its ability to adsorb moisture and needs to be replaced, but the adsorber housing is particularly durable. Our refillable adsorbers can therefore be easily opened and the desiccant replaced. Seals, particle filters & activated carbon discs, on the other hand, can withstand a few replacement cycles, depending on the load. However, we recommend replacing them after 4-5 replacement cycles at the latest to ensure smooth operation of the adsorbers.

Our spare parts kits include seals, particle filters, activated carbon discs and other components that match the respective adsorber series. The matching desiccants for the adsorbers are available separately and in different size classes.

AdsorberSpare part kit


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