PH/PHX-2 Manual
46
Inlet Material Screens
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
Pumps.
2. Desiccant 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 24) 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
Screw 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.
5. Reinstall the Screen, Spring, and Seal.
Screw on the Strainer Screw and screw in Strainer Screw.
6. OPEN the Poly (R) Proportioner Inlet Valve, pressurize the Material Transfer Pump,
check for leaks, and wipe Y-strainer clean.
7. Repeat above for the Iso (A) side.
8. Proceed with Proportioner Purging operation (page 24).
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