Gardner Denver DPB Series Instruction Manual page 31

2. Procedure for element replacement
a. Isolate dryer from air supply
b. Depressurize dryer by running dryer and allowing
system pressure to purge to atmosphere. Loss
of pilot pressure will eventually prevent purge/
repressurization valves from opening. Remaining
pressure can be vented to atmosphere through
the manual drain on the pilot air filter. The system
must be fully depressurized before removing the
bowl.
c. Remove the filter bowl by pushing up, turn-
ing counterclockwise and then pulling straight
down.
d. Clean the filter bowl.
e. Replace the element.
f. Clean and lubricate o-ring at top of bowl and
reassemble in reverse order.
7.5 Dew Point Analyzer Filter (optional)
Element Replacement
1. Frequency of replacement
The Dew Point Analyzer filter contains a filter element
that should be changed yearly. Replacement may
be required sooner if pressure drop across cartridge
prevents the Dew Point Analyzer from operating
properly.
WARNING – The Dew Point Analyzer filter housing
is a pressure-containing device, depressurize before
servicing. Slowly open manual drain valve on bottom
of filter bowl by turning clockwise to verify that the
housing is depressurized before removing bowl.
2. Procedure for element replacement
a. Isolate dryer from air supply
b. Depressurize dryer by running dryer and allowing
system pressure to purge to atmosphere. Loss
of pilot pressure will eventually prevent purge/
repressurization valves from opening. Remaining
pressure can be vented to atmosphere through
the manual drain on the pilot air filter. The system
must be fully depressurized before removing the
bowl.
c. Remove the filter bowl by pushing up, turn-
ing counterclockwise and then pulling straight
down.
d. Clean the filter bowl.
e. Replace the element.
f. Clean and lubricate o-ring at top of bowl and
reassemble in reverse order.
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