Regular maintenance intervals
42
HDK-CNG_EN_03_2016
Never use pipes and fittings as steps or holding points! The components might
fracture, or the distortions which occur may cause internal damage on the
dryer. There is a risk of injury caused by the components slipping, the
components breaking off, and by expanding natural gas!
Never leave tools, loose parts or cloths in, at or on the dryer.
Only use replacement parts that are suitable for the relevant function and meet
the technical requirements stipulated by the manufacturer. This is always the
case, if you use original replacement parts only.
Only use spare parts approved for the Ex-protected area.
When working in an area at risk of explosion, always use suitable tools.
Regular maintenance intervals
Note:
If pressure is well below the CIP after pressure relief of a vessel, e.g.
after the expansion phase, the vessel is pressurised by what is known
as dam pressure. This might be due to
the regeneration gas return line not being free,
contamination of the dust sieves,
drying agent which is too old.
To prevent such malfunctions, regularly service the adsorber as
described below.
The table provides an overview of the maintenance work to be carried out. The
following pages describe some of these tasks.
Component
Maintenance task to be carried
Maintenance interval
da
il
y
w
e
e
k
ly
1
2
m
on
ths
24
m
on
ths
s
e
e
p
a
ge
Complete dryer
Carry out visual and function checks.
Vessel pressure gauge
Check dam pressure. With differential pressures of
more than 1 bar:
– check the regeneration gas line,
– Check dust sieve.
– Check drying agent.
Condensate trap on separator and
upstream filter
Check function of condensate trap
Pressure reducer
Check pressure setting, and reset if necessary.
ATEX-compliant dryer
Check earth/ground rail and retighten grounding strap
if necessary.
Safety valve
Please note the owner's maintenance specification
