dymax 485 Kullanıcı Kılavuzu - Sayfa 10

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10
Model 485 Dispensing Valve User Guide

Maintenance and Cleaning

General

To clean the Model 485 valve, flush system with an appropriate solvent. Common
solvents used to degrade adhesive bonds include the following:
■
Methylene chloride
■
Chlorine bleach (dilute 10%)
■
Strong base, NaOH, or KOH solution with a pH>=12
■
MEK (methyl ethyl ketone) or acetone
For assistance in selecting a compatible solvent, please contact Dymax Application
Engineering.
To access the valve's wetted components for cleaning or replacement, remove the four
Allen Hex Cap Screws (Figure 4) from the bottom of the valve.

Troubleshooting

Table 1. Troubleshooting Chart for Model 485 Dispensing Valve
Problem
The valve does
not dispense
anything
There are air
bubbles in the
fluid
Material leaks
from the valve tip
Possible Cause
The fluid pressure is too
low
The material is cured in
the valve or tip
The valve is not properly
purged
There is a problem with
the material reservoir and
fluid delivery system
An air bubble is trapped in
the fluid section of the
valve or in the dispense tip
Corrective Action
Increase the fluid pressure
Disassemble and clean the valve
Point the valve up and cycle it until
the air bubbles are removed
Diagnose and repair
Point the valve up and cycle it until
air bubbles are purged out