The VV-DV series

Plastic housing Activated carbon 3μm filter GIEBEL Xdry® Slosh protection Pre-filter disk Valves Connection

Attractive price & long runtime

GIEBEL Adsorbers® of the VV-DV series are aeration dryers with a one-way cartridge and a valve part. They are suitable for indoor, outdoor and offshore use on hydraulic power packs, gearboxes, storage tanks and mobile machinery.
The plastic housing is filled with 0.08kg (VV-DV 1M) to 4.3kg (VV-DV 5XL) of GIEBEL Xdry®. This desiccant mixture ensures effective drying of the supply air and absorbs up to 1505ml of water (VV-DV 5XL) until the color change is complete. A 3μm filter additionally cleans the sucked-in air. When air is forced out of the system, a layer of activated carbon adsorbs escaping oil mist, protecting the desiccant and environment from contamination. When the adsorber is saturated, only the cartridge is replaced. The stable and frost-proof valve part remains on the system. It protects the adsorber from unnecessary loading, enables use under extreme, dusty ambient conditions, and ensures minimal pressure build-up even at high air flows.

Move the mouse pointer over the blue highlighted adsorber components of the VV-DV and learn which task they perform in the adsorber.

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Mode of operation

Adsorption – drying of the supply air

The level in the system 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

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

Technical Data

Flowchart

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 evenly distributed over the cross-section. The pre-filter disc frees the air from coarse dirt particles.

When flowing through the desiccant, the water molecules are reliably 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. A 3µm filter ensures that all dirt particles are separated from the ambient air and the silica gel and that the connected equipment is not contaminated.

When air is discharged, a two-stage slosh protection and a layer of activated carbon prevent oil droplets, oil particles and oil mist from entering the desiccant, thus enabling the adsorber to self-regenerate.

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 adsorber must be replaced.