40
K-MT10-95_EN_02
Regular maintenance intervals
Note:
If a vessel has been depressurised, e.g. after completion of the
expansion phase, and the pressure remains above 0 bar, the vessel is
pressurised by what is known as ram pressure. This might be due to
blockage at the muffler(s),
contamination of the dust sieves,
spent drying agent.
To prevent such malfunctions, regularly service the dryer as
described below.
The table provides an overview of the maintenance work to be carried out. The
following pages describe some of these tasks. Maintenance work requiring the
dryer to be largely disassembled is not described. We recommend to have this
work to be performed by authorised specialists.
Component
Maintenance task to be carried
Maintenance interval
da
ily
12
m
o
n
th
s
24
m
o
n
th
s
48
m
o
n
th
s
see p
a
g
e
Complete dryer
Carry out visual and function checks.
42
Vessel pressure gauge
Check dam pressure. For a dam pressure
exceeding 0.3 bar:
– Check muffler.
– Check dust sieve.
– Check drying agent.
42
Muffler
Replace muffler after 1 year of operation and
after renewing the dessicant.
42
Fine filter muffler
Replace element of fine filter muffler after 1
year of operation and after renewing the drying
agents.
42
Dew point sensor (with
optional dew point
sensing-control)
Renew
44
Pilot valves
Renew.
45
Main valves V1/V2
Renew.
45
Expansion valves V3/V4 Renew.
45
Check valves V5/V6
Renew.
45
Solenoids
Renew.
45
Drying agent
Renew.
45
Upstream and
downstream filter
Please see the enclosed operating instructions for the attached filters. Maintenance work
has to be carried out as specified in this document.