Page 14 of 24
Purge Mufflers
: Remove the mufflers from the solenoid valves and check for
excessive pressure drop by blowing through the muffler. The muffler should be
replaced if significant back-pressure is sensed.
Filtration
: Inlet and outlet filters must be kept clean for efficient filtering. A visible
coating of dirt on the element’s surface or an excessive pressure drop (greater than
5-6 psig), indicate that replacement is needed. See the
Replacement Parts
section
in this manual for information on replacement elements for all current filters. For
older filters, please see the
Product Support
section of the PUREGAS website
(www.puregas.com) for more information.
Maintenance Schedule
The following preventive maintenance schedule is recommended to ensure the optimum
performance of the unit and to prevent the inconvenience of a sudden, unexpected
failure. Please reference the exploded view drawings in the
Replacement Parts
section
to identify specific part numbers for your model.
Replace Filter Elements:
Replace the inlet and outlet filter elements every 6-12
months depending on the quality of the compressed air source. PUREGAS stocks
replacement elements for all of the filters offered with its products.
Solenoid Valves on PHF, PCDA, PHCA and PCME Models:
Replace the plunger
and base of the solenoid valves every two (2) years. PUREGAS offers a Solenoid
Repair Kit (P200498S) for this procedure. Two (2) kits are required for each dryer or
adsorber being serviced.
Replace or Repack Desiccant Towers:
Replace or repack the desiccant towers
every five (5) years. Please see the following exploded view drawings to determine
the tower part number required. Please note that the repack option is only available
for the
PHF, PCDA, PHCA
and
PCME
models. Replacement towers are available
for all other models.
Check Valve and O-rings on PHF, PCDA, PHCA and PCME Models:
Replace the
check ball, check spring, and o-rings for
PHF, PCDA, PHCA
and
PCME
models
every 6 years. PUREGAS offers a Maintenance Kit (P200499S) for this procedure.
One (1) kit is required per dryer or adsorber. This kit contains two Solenoid Repair
Kits, two check balls, two check springs, and an assortment of o-rings.
