EN | User Manual Maintenance and repair of the dryer
K-MT 10-95/D3 39
Notes on further maintenance work
Every 12 months
Replacing pilot valves
The pilot valves are part of every service kit and must be replaced every 12 months.
Every 24 months
Replacing inlet valves (V1/V2) and check valves (V5/V6)
The inlet valves (main valves) and the check valves are part of the 24-month service kits.
Replace them every 2 years as a precautionary measure.
Expansion valves (V3/V4)
In addition to the inlet valves and the check valves, the expansion valves have to be re-
placed every 24 months as a precautionary measure.
Replacing solenoid coils
Solenoid coils come with the 24-month service kits. Replace them every 2 years.
Every 48 months
In accordance with national regulations, a pressure vessel inspection may be prescribed to
be carried out at regular intervals by an independent supervisory of ce.
For an inspection of the pressure vessels, the drying agent must be removed.
When inspecting the pressure vessels, it is recommended to check the condition of all ttings
such as e.g. sieve bottoms and dust sieves, including gaskets. If necessary, these ttings
must be cleaned or renewed.
In the event of comprehensive maintenance or repair tasks, contact the manufacturer.
Renew drying agent
The service life of the drying agent is usually approx. 3 to 5 years. However, in favourable
installation conditions, the change of drying agent may be carried out at a substantially later
date. The change interval depends very signi cantly from the degree of contamination in the
compressed air (or the quality of the compressed air upstream lters). Oil, dust, and dirt parti-
cles cover the drying agent surface and reduce its effective surface, in part quite irreversibly.
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