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Installation and Maintenance Instructions

according to Regulation DIN 82079




Information about 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


ona-lk41.png      ona-lk73.png
ONA-LK41      ONA-LK73


Materials used:
Aluminium, stainless steel, FKM

REACH notice:
No ingredients requiring disclosure in accordance with Regulation (EC) No 1907/2006.


Structure and Materials


     Oil Bypass Adapter LK 41mm Oil Bypass Adapter LK73mm
Housing material Aluminium
Material tube Aluminium Aluminium & Stainless Steel
Seal material FKM
Adsorber connection BSP G 1/2“ female BSP G 1” female
Anschluss Bypass BSP G 1/2“ female BSP G 3/4” female
System connection LK 41mm (3x M5) LK 73mm (DIN24557) (6x M5)
operating temperature -40°C - +150°C


Technical Data


  ona-lk41.png ona-lk73.png
Total weight [kg] 0,4 | 0,4 | 0,3 2,3 | 1,8 | 1,3
Diameter [mm] 50 85
Height [mm] 77 77
Hose length [mm] 100 | 200 | 300 300 | 600 | 900


Assembly and Commissioning

Assembly and Commissioning

1. Place the flat gasket on the system in accordance with the bolt circle.
2. Shorten the tube of the bypass adapter to the desired length if necessary.
3. Place the bypass adapter on the flat gasket and align with the bolt circle.
4. Screw in and tighten screws with washers.
5. Screw the adsorber into the upper thread. For this purpose, lightly oil the thread beforehand.
6. Screw the filter system into the lateral threads using hoses.






1. Unscrew the adsorber.
2. Remove the screws from the bypass adapter.
3. Remove the bypass adapter and check the flat seal for damage. If necessary, replace with new ones.
4. Check pipes for damage. If there is damage that impairs the function, replace the adapter.
5. Reassemble everything.


Risk and Hazard Analysis

1. Humid Air flows into the plant
Porous seals
Moist air can flow into the system at the porous points. The seal must be checked according to the maintenance schedule.

2. Bypass Adapter is damaged
Material resistance
When selecting the bypass adaptor, the ambient and operating conditions should be considered. An aggressive environment or liquid in the container can damage the filling adapter.

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

Improper handling
Incorrect or improper handling may damage the bypass adaptor. The recommended installation must be observed.

3. Filter System is not working properly
Cross section of the tubes too small
When selecting the correct off-line adapter, the performance of the filter system must be matched to the cross sections of the pipes. A too small cross section generates an increased pressure.

Damaged tubes
Demolished tubes can affect the proper functioning of the filter system.

Thread of the Adsorber and Accessories is damaged

4. Thread of the Adsorber and Accessories is damaged
When mounting the adsorber as well as the valve part on the system, the threads must be slightly wetted with oil. Failure to lubricate the threads can lead to rubbing of the individual threads and is no reason for complaint.




Maintenance Plan

1. Check Seals for Wear

Check    The flat gasket supplied with the filling adapter must be checked for perfect condition. For this purpose the seal should be checked for brittleness.
Cycle    Annually
Measures    If damage is present, the seal should be replaced.

2. Check Tubes for damage

Check    The tubes must be checked for damage.
Cycle    Annually
Measures    If the tubes are damaged, the entire adapter must be replaced.

3. Visual Inspection of the Bypass Adapter

Check    Visually inspect the bypass adaptor for damage. Damage may occur due to various environmental or operating conditions or improper handling.
Cycle    Annually
Measures    If the bypass adaptor is damaged, it should be replaced to ensure full functionality.

4. Replacing the Wearing Parts

Check    The wearing parts (here seal) 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 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