Transcript
Section 1I
Short Size Reverse Flush Filter
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Q 1994 NordsonCorporation Ail RightsResewed
42-62 Issued 6/94
P/N 106 895A
II-0
Short Size Reverse Flush Filter
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P/N 106 895A
42-62 Issued 6/94
Q 1994 NordsonCorporation All RightsResemd
SECTION 11
## TABSHEET ##
Short Size Reverse Flush Filter
11-I
Section 11 Short Size Reverse Flush Filter 1. Description
Your Nordson 800M applicator is equipped with the short size “reverse flush” filter. This filter is located on the end of the manifold opposite from the gear pump and drive assembly. This filter assembly design allows for removal of char and debris from the system without manually removing and disassembling the filter screen. During normal operation, the filter handle is set to the RUN position. Material flows through the filter screen from the inside to the outside of the screen, depositing char and debris on the inside of the screen. During the filter flushing procedure, the filter handle is set to the DRAIN position and the manifold drain valve is opened. Now material flows through the filter screen from the outside to the inside of the screen, removing the built-up char and debris from the inside of the screen. This debris is then directed to the drain valve, where it exits the applicator during the filter flushing procedure. When the draining material becomes clean again (all loose char has been removed from the screen), the drain valve is closed and the filter handle is set back to the RUN position.
0 1994 NordsonCorporation All RightsReserved
42-62 Issued 6/94
P/N 106 895A
II-2
Short Size Reverse Flush Filter
2. Servicing the Filter
Safety Recommendations
Allow only qualified personnel to repair this equipment. Personnel servicing this equipment should be familiar with Section 1 of the manual, Safety Instructions.Also, follow the safety recommendations here that apply to the procedure you are doing. WARNING: Hot. Risk of burns. Wear heat-protective clothing, goggles (ANSI 287.1-l 989 or equal), and safety gloves. This warning is especially important when breaking any hydraulic connection in the system. If you have not property relieved system pressure, hot material can be released forcefully, causing serious burns. Wearing protective clothing is also important when you must work near, touch, or handle hot equipment parts. This includes modules, pumps, manifolds, nozzles, and heaters. Applicator parts are typically heated to a temperature of 300-400 “F (149-204 “C). WARNING: Risk of bums. Failure to relieve system pressure before breaking a mechanical connection could result in serious burns. Hot melt material may spray out as the connection is loosened. An example of a procedure that calls for breaking a mechanical connection is pump replacement. Relieve system pressure before breaking any mechanical connection in the hydraulic system. Follow the procedure called Relieving Hydraulic Pressure. You must perform several steps correctly to relieve pressure in all parts of the system. WARNING: Risk of burns. Applicator parts, which are typically heated to a temperature of 300-400 OF (149-204 “C), can cause severe bums. Let hot equipment that must be touched, handled, or removed cool down before starting disassembly and repair procedures. However, do not let the equipment cool down completely. If the adhesive solidifies, you may not be able to break connections. You can use the Temperature Standby function to reduce temperatures.
P/N 106 895A
42-62 Issued 6/94
Q 1994 NordsonCorporation All RightsReserved
Short Size Reverse Flush Filter
Relieving Hydraulic Pressure l
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WARNING: Risk of bums. Failure to relieve system pressure can result in hot material spraying from a connecting point, possibly causing serious bums. Before removing a hose, an applicator module, or any other part of the pressurized system, you must first relieve system pressure.
1. Turn the melter and applicator pumps off. 2. Place collecting pans under the applicator manifold drain valve and the melter manifold drain valve. 3. Open the melter manifold drain valve. 4. Use a flat blade screwdriver to turn the applicator reverse-flush filter to the DRAIN position. See Figure 11-l.
4110146
Figure 1I- 1 Setting the Reverse Flush Filter to DRAIN
Q 1994 NordsonCorporation All RightsReserved
42-62 Issued 6/94
P/N 106 895A
II-4
Short Size Reverse Flush Filter
Relieving Hydraulic Pressure
5. Open the applicator drain valve.
(contd.)
6. (If applicable) Trigger the dispensing modules. This is especially important because it is the only way to relieve pressure downstream of the pump. 7.
Hydraulic pressure is relieved when material stops flowing from the drain valve and dispensing modules. Close the applicator and melter drain valves.
8. Set the reverse-flush filter to RUN. See Figure 11-2.
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4110140
Figure 1l-2 Setting the Reverse Flush Filter to RUN
This completes the procedure for relieving hydraulic pressure.
P/N 106 895A
42-62 Issued 6/94
Q 1994 NordsonCorporation All RightsReserved
Short Size Reverse Flush Filter
Flushing the Filter
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Flush the applicator filter daily unless operating experience indicates that more or less frequent flushing is required. The hot melt system must be at operating temperature to prevent damage to the filter screen. 1. Ensure the system is at operating temperature. 2. Complete steps 1 through 6 of the procedure for Relieving Hydmulic Pressure earlier in this section. Close the melter drain valve, but leave the applicator drain valve open. Note: Leave the applicator reverse flush filter set to the DRAIN position and the applicator drain valve open. 3. Start the applicator pump and gradually increase the pump speed. Allow material to flow from the drain valve until it is clean and free from all contaminants. 4. Turn the applicator pump off. 5. Close the drain valve. 6. Turn the filter to the RUN position. This completes the filter flushing procedure. Resume normal operation as directed in Section 4.
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Q 1994 NordsonCorporatim All RightsResewed
42-62
Issued 6/94
P/N 106 895A
II-6
Short Size Reverse Flush Filter
Cleaning/Replacing the Filter
Perform this procedure once a week unless operating experience indicates that more or less frequency is required. The hot melt system must be at operating temperature before the filter is removed for cleaning. 1. Ensure the system is at operating temperature. 2. Complete steps 1 through 6 of the procedure for Relieving Hychdic Pressure earlier in this section. Close the melter drain valve, but leave the applicator drain valve open. Note: Leave the applicator reverse flush filter set to the DRAIN position and the applicator drain valve open. 3. Start the applicator pump and gradually increase the pump speed. Allow material to flow from the drain valve until it is clean and free from all contaminants. 4. Turn the applicator pump off. 5. Use a socket wrench to unscrew the filter assembly and remove it from the manifold.
P/N 106 895A
42-62 Issued 6/94
0 1994 NordsonCorporation All RightsReserved
Short Size Reverse Flush Filter
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6. Remove the long round head screw from the filter bung, then slide the spring/screen/core assembly from the filter bung as shown in Figure 11-3.
Cleaning/Replacing the Filter (con td.)
Figure 11-3 Short Size Reverse Flush Filter Components 1. Round head screw with thread lubricant 2. lubricant Round head screw with thread 3. Filter core 4. Filter screen
5. 6. 7. 8. 9.
Filter spring Filter bung O-ring Roll pin Filter cap
10. Flat socket screw 71. Filter handle 12. Handle driver 13. RUN/DRAIN adjusting pin 14. Roll pin
7. Remove the spring and core from the filter screen. 8. Clean the filter screen using one of the three methods below:
Q 1994 No&on Corporation All RightsResewed
42-62 Issued 6/94
P/N 106 895A
11-8
Short Size Reverse Flush Filter
Cleaning/Replacing the Filter (contd)
Method A. Step 1 - Place the filter components in a container of Nordson Type R Solvent. WARNING: Risk of Fire. Using an open-flame or unregulated hot plate to heat Type R solvent can cause a fire that can cause severe injury. Do not heat Type R solvent above 475” F (246” C). Do not heat Type R solvent with an open flame or in an unregulated heating device (for example, a small pan on an unregulated hot plate). Use a controlled heating device (such as a small deep fat fryer or thermostatically controlled hot plate) to heat the solvent above the melting temperature of the hot melt material. Method A. Step 2. Heat the solvent above the melting temperature of the adhesive. Then use a fine bristled brush to scrub the filter screen. The reverse flush filter collects contaminants on the inside, so remember to scrub the filter screen inside and out. Note: Do not use a metal brush. Damage may result to the screen mesh, preventing proper operation of the filter. Method B. Heat the filter screen with a flameless electric heat gun. Then wipe the filter with a clean, dry cloth. Method C. Use an ultrasonic cleaner filled with solvent to clean the filter screen. 9. Inspect the screen for damage. Any dents or breaks in the mesh mean that the screen is damaged beyond repair and should be replaced. 10. Inspect the o-ring for cuts, hardening, and other damage. To replace the o-ring, disassemble the control knob end of the filter bung as shown in Figure 11-3. Slide the old o-ring out of its groove and install a new one. Then reassemble the control knob end of the filter bung.
P/N 106 895A
42-62 Issued 6/94
0 1994 NordsonCOrpOratim All RightsReserved
Short Size Reverse Flush Filter
Cleaning/Replacing the Filter (contd.)
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11. Slide the filter screen over the filter core. Then slide the spring over the screen. 12. Insert the spring/screen/core assembly into the filter bung. Then reinstall the long round head screw removed in step 6. 13. Thread the filter assembly into the manifold until it is hand-tight. CAUTION: Ensure that the manifold is at operating temperature when the filter is reinstalled. Cold material on the filter or manifold walls can cause the filter screen to collapse if the filter is tightened in a cold system. 14. Turn the filter screw to the DRAIN position. 15. Turn the melter pump and applicator pump on. 16. Allow material to flow from the applicator drain valve until the material is clean and free from all contaminants. 17. Turn the melter pump and applicator pump off. 18. Close the applicator drain valve. 19. Turn the applicator reverse flush filter to the RUN position. 20. Tighten the filter until it seats, but do not over-tighten it. This completes the filter cleaning procedure. Resume normal operation as directed in Section 4.
Q 1994 No&on Corporation All RightsResewed
42-62 Issued 6/94
P/N 106 895A
11-10
Short Size Reverse Flush Filter
3. Parts List with Illustration Short Size Reverse Flush Filter Assembly (Pm 116 829) Item No.
Part No.
Description
SE?f3 Note
Qty. in Assembly
1
981 157
Screw, Round Head, IO-32 x 2.75 in. long
2
900 341
Lubricant, Thread
3
116 827
Core, Filter, Reverse Flush, 1.63 in. long
1
4
116 825
Screen, Filter, Reverse Flush, 0.006 in. mesh, 2.00 in. long
1
5
116 826
Spring, Filter, Reverse Flush, 1.89 in. long
1
6
116 823
Bung, Filter, Reverse Flush, 6.45 in. long
1
7
941 201
O-ring, Viton, 1.OOx 1.I88 x 0.094 in.
1
8
985 302
Pin, Roll, 0.125 x 0.50 in.
1
Cap, Filter
1
9
4
IO
982 188
Screw, Flat Socket, M5 x 16 mm long
3
11
275 479
Handle, Filter
1
12
275 476
Driver, Handle
1
13
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Pin, Adjusting, Run/Drain
1
14
985 303
Pin, Roll, 0.125 x 0.75 in.
1
P/N 106 895A
42-62 Issued 6/94
0 1994 No&on Corporation All RightsReserved
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Short Size Reverse Flush Filter
II-11
4110106
Figure 11-4 Short Size Reverse Flush Filter Assembly
0 1994 NordsonCorporation All RightsReserved
42-62 Issued 6/94
P/N 106 89SA
11-12
Short Size Reverse Flush Filter
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PIN 106 895A
42-62 Issued 6194
0 1994 NordsonCorporation All RightsResewed
