DuraBlue II Customer Product Manual - 第106页

Service 5-16 Part 1126931_01  2018 Nordson Corporation Pressure/Circulation Control Valve Service Kit Each kit contains two O‐rings and high‐temperature grease. Service kit P/N: 394600 Required tools: Open‐jawed wrench,…

Adjusting the set screw

Service

5-15

Part 1126931_01

 2018 Nordson Corporation

Pressure Control Valve

Replace the Pressure Control Valve

Figure 5‐10 Pressure control valve set screw insertion depth

NOTE: Screw in only when valve and pump are warm and material is soft.

1. Ensure the melter is at operating temperature.

2. Relieve system pressure. Refer to Section 1, Safety.

3. Measure and make a note of the insertion depth of the set screw

(dimension X). This way the insertion depth can be replicated after

reassembly.

4. To prevent adhesive from leaking into the valve bore, drain the tank.

Refer to Draining Material from the Tank later in this section as needed.

5. Remove the old pressure control valve.

6. Apply high temperature grease to all threads and O-rings.

7. Slide the valve into the hole and tighten with torque wrench

(15 N•m / 133 in.-lb).

8. Adjust the setting screw to the recorded dimension X.

 Turning to the right increases material pressure.

 Turning to the left decreases material pressure.

Service

5-16

Part 1126931_01

 2018 Nordson Corporation

Pressure/Circulation Control Valve Service Kit

Each kit contains two O‐rings and high‐temperature grease.

Service kit P/N: 394600

Required tools:

Open‐jawed wrench, size 24

Pliers

Torque wrench

1. Heat melter to operating temperature.

WARNING: Hot! Risk of burns. Wear appropriate protective

clothing/equipment.

2. Relieve melter pressure.

3. Measure insertion depth. Refer to Pressure Control Valve.

4. Use an open‐jawed wrench to screw out the pressure control valve, then extract with a

pliers.

5. Remove old O‐rings and disassemble and clean pressure control valve. Refer to Section

7, Parts, for a detailed drawing.

NOTE: Disassemble valve only when warm.

6. Install new O‐rings. Apply grease to all threads and O‐rings.

7. Guide pressure control valve into the hole when the melter is warm and tighten with

torque wrench.

Starting torque: 15 Nm (133 in.‐lb)

8. Adjust set screw. Refer to Pressure Control Valve.

Service

5-17

Part 1126931_01

 2018 Nordson Corporation

Cleaning the Tank

Draining Material from the Tank

Pump material out of the melter.

CAUTION! Do not feed charred material though the applicator. Particles can

block the applicator. Instead unscrew hose (refer to Section 3, Installation).

Cleaning the Tank by Hand

Cold material can usually be peeled off of the sides of the tank. If necessary,

first heat tank to material softening temperature, usually approximately

70 ° C / 158 ° F.

NOTE: The inside of the tank is release coated. Do not use metallic tools to

clean. Do not use wire brushes! This could damage the release coating.

Tightening the Fixing Screws

Heating and cooling that occurs during daily operation can cause the fixing

screws to loosen. Tighten screws as indicated in the table below.

NOTE: Tighten fixing screws only using a torque wrench and when the

melter is cold.

Connection

Thread Torque

Tank/manifold M 6 6-8 Nm / 53-71 in.‐lb