Maintenance
5-9
P/N 7135268B
E 2008 Nordson Corporation
PURBlue EC
Pressure Control Valve
Replacing O-rings
Fig. 5-4
WARNING: Hot! Risk of burns. Wear appropriate protective
clothing/equipment.
1. Heat melter to operating temperature.
2. Relieve melter pressure.
3. Close tank isolation valve.
4. Refer to Measuring Insertion Depth.
5. Use an open-jawed wrench to screw out the pressure control valve, then
extract with a pliers.
6. Remove old O-rings and clean pressure control valve.
7. Install new O-rings. Apply high temperature grease to all threads and
O-rings.
8. Guide pressure control valve into the hole when the melter is warm and
tighten with torque wrench. Torque: 15 Nm (133 lbin).
9. Refer to Adjusting Setting Screw.
Fig. 5-5
10. Open tank isolation valve.
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