Valco Cincinnati VC350A, Manual

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Valco Cincinnati
9-1
Introduction
This section contains maintenance procedures for the VC350A.
System Shutdown
For short periods of time (such as order changeover) apply lithium grease or petroleum jelly to the nozzle orifice
(non-contact) or applicator head orifice (contact). This will prevent dried adhesive from clogging the valve. The
valve must be cleaned before starting production.
For longer periods of time, remove the applicator head (contact) and flush it with water. Install the stopper in place
of the applicator head on the glue valve.
If the system is to be idle for a period of 30 days or longer, flush the entire glue supply system with water.
System Lubrication
•
Use lithium grease on all machined threads and fittings when servicing the system.
•
Grease quick-disconnect fittings frequently to prevent dried glue from causing wear.
Adhesive System Flush
The entire system must be flushed when:
•
A new adhesive formula is not compatible with the present formula. (Always consult your adhesive
supplier regarding compatibility between adhesive formulas.)
•
System has been shut down for several months and glue will not flow
•
Glue-line buildup causes an excessive pressure drop
•
Excessive filter screen maintenance is required due to contaminated adhesive
A mild vinegar-and-water solution (1 part vinegar to 10 parts water) should be used when flushing the system.
Water alone can be used when you are simply changing adhesives or preparing the system for an extended period of
downtime.
In-Line Glue Filters
In-line glue filters should be inspected and cleaned regularly. On new installation, screens should be inspected once
a week during the first month to determine maintenance requirements.
Note! Frequent clogging of filter screens may indicate that the entire glue system requires cleaning.
Section 9—Maintenance