The VL-R series.

Reusable inline adsorber with integrated filter

GIEBEL Adsorber® of the series are VL-R reusable inline filters with threaded connections on both sides. The plastic housing is filled with GIEBEL Xdry®. The desiccant mixture ensures effective drying of the supply air. In addition to the desiccant, a filter is integrated to separate abrasion and ambient dirt.
VL-R adsorbers are used to dry air streams for small laser systems up to large storage tanks. With a DN50 thread, even large volume flows can be passed through the adsorber.
If required, the inline filters can also be filled with other desiccants – e.g. molecular sieves (3A, 4A, 5A, 13X), if other substances are to be adsorbed specifically in addition to the separation of moisture. Once the adsorber is saturated, both the desiccant bed and, if required, all other components of the inner workings can be replaced at low cost.

Mode of operation.

Adsorption – drying of the supply air

  • Air flows into the adsorber
  • Coarser dirt particles are filtered out at grid & filter disk
  • Uniform flow through the adsorber
  • Air is dried to 2% rH
  • GIEBEL Xdry® discolors as saturation increases
  • Air is filtered to 2μm

Dry and clean supply air

Technical data.


The air flows through the insert grid into the adsorber and is evenly distributed over the cross-section. The first filter disc retains coarse dirt particles. When flowing through the desiccant, the water molecules are safely removed from the air. The gap volume of the granulate is optimally selected with 2 to 5 mm grain size and guarantees a minimum pressure build-up with very good drying efficiency at the same time. Thus, a residual air humidity of max. 2% rH and a dew point of -40°C are achieved at the beginning of the drying process. An additional foam filter disc ensures that all dirt particles are separated from the ambient air and the GIEBEL Xdry® fill and that the connected plant is not contaminated.

With increasing saturation, the orange silica gel grains of the GIEBEL Xdry® fill turn green. If the silica gel grains have turned completely green, the fill must be replaced. After 4-5 replacement cycles at the latest, we also recommend replacing seals and filter discs.

Pressure ratios.

Spare parts 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 packages 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 stressed over use, increasingly losing its ability to adsorb moisture and requiring replacement, while the adsorber housing is particularly durable. Our refillable adsorbers can therefore be easily opened to replace the desiccant. Seals, particle filters and activated carbon disks 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 packages include gaskets, particle filters, activated carbon discs and other components matched to the respective adsorber series. The matching desiccants for the adsorbers are available separately and in various sizes.

Adsorber Spare parts kits