Chapter 4
Installation & Startup
Page 30 UFD Applicator, Manual 40-43, Rev. 6.16
Purging Adhesive Through the Applicator
This procedure may be used anytime the operator wishes to purge old adhesive from the
Applicator and replace it with fresh adhesive. For example, this procedure could be used
in instances where the adhesive system has been held at temperature for an extended
time without running, such as during a production line start-up.
WARNING! HOT SURFACE & ADHESIVE!
The equipment will still be hot when this procedure is being done.
Use insulated gloves and protective clothing.
Procedure
1. Remove all nozzles. Place a suitable container under the Applicator to catch adhesive.
2. Activate the modules and manually run the adhesive pump to purge the hoses and
Applicators of old adhesive. Purge until the adhesive exiting the modules is fresh.
3. Check system pressure to see if filters are clogged and need to be changed.
4. Replace the nozzles and check the adhesive flow through them. Compare to target
flow.
5. Check the nozzle spray pattern.
6. Clean any nozzles that do not spray properly and check the spray pattern again.
4.3 Quality of compressed Air
Compressed air quality class according to ISO 8573-1
• We recommend to use a maintenance-unit for compressed-air conditioning with a filter
40µm.
• Keep the quality class 5.4.2 according to ISO 8573-1.
Classification of Quality Classes According to ISO 8573-1:
Class 1. Particulate Material 2. Water Content 3. Oil Content
max. particle size
(μm)
max. particle density
(mg/m3)
max. pressure dew point
(°C)
concentration
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