PH-20/PHX-20 Manual
42
MAINTENANCE
Inlet Material Screens [O, page 9]
Inspection of the Inlet Material Screens on a daily basis is no longer necessary as long as
the following conditions are met.
1. Material drums are stored within the recommended material storage temperature
range and drums are not opened prior to installing the Proportioner Material Transfer
Drum Pumps.
2. Desiccated air dryers are used to dry replacement air as material is removed from the
drums to the Proportioner.
3. Consolidation of old material into a common drum for use is minimized especially the
Iso (A).
If the above conditions are met, inspection of the Inlet Material Screens may be done on a
bi-weekly basis.
NOTE! Inspect and clean Inlet Material Screens before Proportioner start-up.
They should not be cleaned after the days operation as the Proportioner
should be purged (see page 18) immediately after inspection and cleaning.
This is to reduce the risk of moisture contamination, contamination through
the reaction with the solvent used in the cleaning operation and cross-over at
the Spray Gun due to air entrapment.
To check the Inlet Material Screens, proceed as follows:
CAUTION! Make sure the Main Power Switch is OFF and incoming power is
locked OFF.
1. CLOSE the Poly (R) Proportioner Inlet Valve.
2. Place a suitable container under the Material Inlet Strainer to collect the residual
material. Carefully loosen the Strainer Plug allowing the material to drain into the
container.
3. Completely unscrew the Strainer Screw.
4. Remove the Seal, Spring and Screen and
clean them with a suitable solvent. Dry the
parts and ensure the Screen is not
obstructed. Replace or clean the Screen if
more than 20% of the Screen surface is
obstructed by residue.
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