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Assembly and maintenance instructions

according to regulation DIN 82079

Adsorber MA-R

Adsorber MA-R


Information on the manufacturer

Giebel Filtec GmbH

Giebel FilTec GmbH
Carl-Zeiss-Str. 5
74626 Bretzfeld-Schwabbach

Phone +49 7946 944401 0
Fax +49 7946 944401 29


Product overview


Adsorber MA-R


Size 2
Size 3 MA-R 3M / MA-R 3L
Size 5 VV-R 5M

Materials used:

Aluminium, acrylic glass, stainless steel, polyoxymethylene (POM), FKM, EPDM, silica gel orange, activated carbon

No ingredients requiring disclosure under Regulation (EC) No 1907/2006.


Construction and materials


Use Reusable
Housing material Aluminium
Adsorbents Silica gel, activated carbon
Particulate filter Filter element with 3 µm separation efficiency
Seal material FKM / EPDM
Operating temperature -40°C - +80°C
Connection BSP / NPT / Metric / Slipfit


Technical data



ma r 1l ma r 3m ma r 3l ma r 5m






Total weight [kg]





Adsorbens [kg]





Max. Water absorption [ml]





Height [mm]





Housing diameter [mm]





Screw-in diameter [mm]






BSP, NPT, Metric, Slipfit

Valves [IN - OUT]

0 - 0

0 - 0

0 - 0

0 - 0


Assembly and commissioning

Assembly and commissioning

1. Remove protective foil on the underside of the adsorber.

2. Lightly oil the thread.

3. Screw the adsorber onto the system.

Assembly and commissioning Assembly and commissioning



Once the silica gel is completely saturated, a spare parts kit must be used.




0% -> 100%

If the colour of the silica gel has completely changed according to the colour indicator used, it must be replaced.


    1.   Unscrew the adsorber from the system.

    2.   Open the lid using the clamps.

    3.   Remove the seal in the cover and replace it with the new one.

    4.   Remove the activated carbon disc and empty the desiccant.

    5.   Pull out the filter element.

    6.   Remove the lower foam disc as well.

    7.   Insert new foam disk.

    8.   Insert a new filter element and then fill in fresh desiccant When filling in the desiccant,
          Blightly tap the housing with a soft object (e.g. the ball of your hand)
          to compact the bulk material.

    9.   Insert new activated carbon discs and then close the lid again using the clips.

    10.   Screw the adsorber back onto the system.



Spare parts and storage

Adsorber Spare parts kit* Desiccant
MA-R 2L ET MA-R 2L SOG 4 kg
MA-R 3M ET MA-R 3M SOG 4 kg
MA-R 3L ET MA-R 3L SOG 4 kg
MA-R 5M ET MA-R 5M SOG 4 kg

* also as EPDM version

Spare parts and storage
Exemplary representation
of the spare parts set
     Spare parts kit
- Silica gel
- Activated carbon
- Filter discs
- Filter element
- Seal kit

individually and airtightly packed.
         Spare parts and storage      Desiccant
- Silica gel

Airtight packaging


Order of spare parts

For a constant operational readiness of the adsorber and thus the plant, make sure that a spare parts kit is always in stock.
The time until the complete colour change from and thus the service life of the adsorber depends on various factors:

  • Number and duration of flow and loading intervals.
  • Air flow volume and flow velocity, relative humidity of ambient air.
  • Temperature of the ambient air and the medium to be ventilated.


Storage of adsorbers

All articles filled with desiccant are packed airtight. To avoid damage to the desiccant, it must be stored in dark and dry rooms at -10°C to +30°C.




In practice, the most common regeneration method used is the temperature increase. When desorbing water vapour from silica gel, the temperature must be above 100°C. For silica gel with colour indicators a regeneration temperature of 120°C should be maintained in order not to damage the colour indicator applied.
It is nevertheless recommended to use fresh silica gel.


NAt the end of its useful life, the device must be disposed of in accordance with the relevant legal regulations. Metal and plastic parts should be separated and disposed of separately.
The loaded desiccant Silicagel Orange can be disposed of in household waste.
Silicagel Orange is not classified as a hazardous substance under European Union legislation (Regulation EC No 1272/2008). It is not subject to compulsory labelling in accordance with EC Directive (67/548/EEC or 1999/45/EC). Silicagel Orange is not considered to be a substance hazardous to health or the environment.


Risk and hazard analysis

1. Moist air flows into the system
Porous seals
Moist air can flow into the adsorber or into the plant at the porous points. This means that complete drying is not possible and moist air enters the plant.

Saturated drying agent
When the desiccant is saturated, it can no longer absorb moisture. This allows moist air to enter the system.

Air flow rate too high
If the air flow rate is too high, the contact time between moist air and desiccant is too short. This allows moist air to flow into the system.

Oil on the drying agent
If too many oil particles enter the adsorber, the oil particles close the pores of the desiccant and thus prevent adsorption.

Ambient temperature too high
If the ambient temperature exceeds 80°C, the binding forces in the desiccant decrease. This means that the incoming ambient air is only dried to a limited extent.

2. Positive or negative pressure builds up in the system
Air flow rate too high
Too high an air flow rate can cause over- or underpressure in the system.

Contaminated filter element
The filter unit can be clogged by dirt particles and can therefore build up pressure in the system.

Oil on the drying agent
If oil particles get into the adsorber, the spaces in the fill can be filled with oil and the fill will stick together. This can cause pressure to build up in the system.

3. Adsorber is damaged
Material resistance
When selecting the adsorber, the ambient and operating conditions should be considered. An aggressive environment or liquid in the container can damage the adsorber.

Temperature range
The ambient and operating temperatures should not exceed or fall below the specified range, otherwise the adsorber may be damaged.

Improper handling
Incorrect or improper handling can damage the adsorber. The recommended installation must be observed.

Strong vibrations
Strong vibrations of the plant can damage the adsorber.

Pressure range of the system
The adsorber should not be exposed to over- or underpressure above 0.5 bar, otherwise the housing may be damaged.

Thread of the adsorber and accessories is damaged

Thread of the adsorber and accessories is damaged
When mounting the adsorber on the system, the threads must be slightly moistened with oil. Failure to lubricate the threads can lead to the thread rubbing and is not a reason for complaint.



Maintenance plan

1. Check seals for wear

Check    The O-rings installed in the adsorber and the flat gasket must be checked for perfect condition. For this purpose the seals in the lid, on the filter and on the connection should be checked and examined for brittleness.
Cycle    Half-yearly
Measures    In case of existing damage, a new spare parts kit or a new adsorber should be used.

2. Visual inspection of the silica gel

Check    The loading condition of the silica gel must be determined by visual inspection of the adsorber. The colour orange indicates that the silica gel can still adsorb water and air is dehumidified. When the silica gel is completely saturated, the colour changes to green or colourless.
If there are oil particles on the silica gel, these close the pores and the adsorption capacity is reduced. This causes the silica gel to discolour more slowly and unevenly.
Cycle    Half-yearly
Measures    If the silica gel is loaded or damaged by oil, a new spare parts kit or a new adsorber with fresh silica gel should be used.

3. Check filter unit for impurities

Check    Take off the lid and remove the activated carbon disc. Then empty the desiccant. The filter unit can then be removed. This should be checked for contamination and should be free of dirt for smooth operation.
Cycle    Half-yearly
Measures    The filter element is part of the spare parts kit and should be replaced if it is contaminated.

4. Visual inspection of the adsorber

Check    The adsorber must be checked visually for damage. Damage can occur due to various environmental or operating conditions.
Cycle    Yearly
Measures    If the adsorber is damaged, it must be completely replaced to ensure full functionality.

5. Replacing the wearing parts

Check    The wearing parts, in particular the seals, the silica gel as well as the adsorber housing, must be checked with regard to their condition.
Cycle    Every two years
Measures    Regardless of the result of the test, it is recommended to replace the wearing parts by using a spare parts kit or a new adsorber to ensure smooth operation.


Contact and sales partner

Contact our contact persons and sales partners


We're here for you

You will receive an offer on the same day.
We are happy to advise you on short notice via video or
realize a personal appointment within one week.
You will receive a standard GIEBEL Adsorber within a week.


Carl-Zeiss-Str. 5 | 74626 Bretzfeld | Germany
Phone: +49 79 46 94 44 01-0