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| User Manual
Maintenance and repair of the dryer
KE-MT 120-600
41
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 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 offi 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 fi ttings
such as e.g. sieve bottoms and dust sieves, including gaskets. If necessary, these fi 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 signifi cantly from the degree of contamination in the
compressed air (or the quality of the compressed air upstream fi lters). Oil, dust, and dirt parti-
cles cover the drying agent surface and reduce its effective surface, in part quite irreversibly.
Replacing dust fi lters
Clogged dust fi lters result in a back pressure that can cause fl uctuations in the compressed
air network. You should therefore replace dust fi lters along with the drying agent. Dust fi lters
come with the “DESPAC” drying agent packs
Replacing solenoids
Solenoids come with the 48-month service kits. Replace them every 4 years.
