Maintenance
5-3
Part 1108061-02
E 2015 Nordson Corporation
Daily Equipment Maintenance
Establish a daily maintenance schedule for your Colormax Engineered
powder coating system equipment.
Table 5-1 Daily Equipment Maintenance
Equipment Procedure
Flame Detector
System
Check the detector sensors every four hours and clean the lenses, if
necessary. Make sure the detector system is operating properly.
Air Dryers Perform any required maintenance as described in your air dryer manual.
Air Velocity Measure the air velocity at all booth openings with a velometer. Minimum
velocity is 36 m/min (120 fpm).
Compressed Air
Supply
Hold a clean, white cloth under the main air drain valve and open the valve.
Water, oil, or other contaminants will stain the cloth. Eliminate any source of
contamination. Drain the filters and separators and check the filter elements.
Check all air pressure regulator settings.
NOTE: The air dryer should remain on at all times to prevent moisture from
accumulating in the compressed air system.
Afterfilter Cartridge
Filters
Pulse the cartridge filters.
With the exhaust fan operating, check the cartridge filter differential pressure
gauge. It should read between 4- and 6-in. wc. Check the pulse valve timing
to make sure that the cartridge filters are being pulsed often enough to prevent
clogging.
Afterfilter Final Filters With the exhaust fan operating, check the final filter differential pressure
gauge. It should read between 1- and 2.5-in. wc.
Gun Movers
(Positioners,
Oscillators or
Reciprocators)
Each shift, make sure the oscillators and reciprocators are stroking smoothly
and at the proper speed. Perform maintenance as called for in the respective
equipment manuals.
Powder Spray Guns Clean the spray guns according to the instructions in their manuals.
Powder Feed Pumps Disassemble and clean the pump blocks, venturi throats and throat holders.
Replace worn parts.
Sieve Remove and clean the screen. Replace the screen if it is damaged.
Check the rubber seals. Replace any damaged or worn parts.
Transfer Pumps Disconnect the transfer hoses from the pumps. Blow out the powder from the
hoses with compressed air.
Disassemble the pumps. Clean the parts with a low-pressure air gun and a
clean cloth. Replace any worn or damaged parts.
Workpiece and
Conveyor Grounds
WARNING: An ungrounded or poorly grounded workpiece,
hanger, or conveyor can cause electrical arcing. If arcing is
observed, shut down the system immediately. Correct the cause
before resuming operations. Failure to observe this warning
could result in a fire or explosion, causing property damage and
possible personal injury or death.
Make sure all workpieces are grounded through the hangers and conveyor.
The resistance between the workpieces and the hangers, and the hangers and
ground, must be less than 1 megohm. Use a megohm meter to check
resistances. You will get better transfer efficiency and workpiece coverage at
500 ohms or less. Clean the hangers regularly.
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