Nordson_EFD_Series_450_Instructions - 第15页
Series 450 Autovalve / Snuff Back | Instructions / Parts Lists 15 www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide. T r oubleshooting Prob…
Series 450 Autovalve / Snuff Back | Instructions / Parts Lists
14 www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.
Accessories (continued)
Ratio Check Cap
In order to ensure correct A/B ratio, ratio checks
should be performed regularly with our Ratio Check
Cap.
Night Cap
At night or on weekends, it is a good idea to seal your
system. After the static mixer is removed, a night cap
can be installed. This seals the system and makes
startup simpler.
P/N Description
7701184* Ratio Check Cap with retaining nut
7701181* Night Cap with retaining nut
*Use with 1:1 ratio manifolds only.
Ratio check
Night cap
Manifold Manifold
Series 450 Autovalve / Snuff Back | Instructions / Parts Lists
15www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.
Troubleshooting
Problem Possible Cause Solution
No flow Manifold clogged Remove manifold and clean
Air pressure too low Requires 5.5bar (80psi) inlet pressure
Air valve damaged See Note 1 below
Valve fouled See Note 2 below
Disassemble (see Maintenance)
Valve leaks Snuff-back Retract snuff-back screw (70)
Spool valve (75) clogged See Note 3 below
Seals (3) worn Replace seals (see Maintenance)
Spool valve (75) worn Inspect and replace if required
Valve drools Air trapped in valve Replace seals (see Maintenance)
Seals (3) worn Review Startup procedure
Off ratio A:B Metering pumps Check pumps
A & B back up into tie plate Seals (3) damaged Replace back lip seals (page6)
Material not mixing Mixer fouled Replace mixer
Off ratio A:B Take ratio check
Mixer leaks Manifold fouled Clean nose of manifold
Lip seals deteriorated Chemical attack See Maintenance
NOTE 1: Inspect air cartridge valve (103) in handle (90). The On-Off function of the valve is controlled by this cartridge valve
in the handle. The air cylinder requires air in the front to close and air in the back to open.
To inspect the cartridge valve, disconnect the two air lines on the air cylinder (1). When the trigger is depressed, air should
be flowing only through the back air line and not through the front air line. When the trigger (91) is released the air should
reverse.
NOTE 2: Advance the snuff-back screw (70) and pulse air into the air cylinder. Repeat 3 or 4 times.
NOTE 3: First release the pressure on the A and B hoses. Remove the manifold and advance the snuff-back screw (70) until
the spool valves are protruding from the seat plate (8). With a toothbrush or rag soaked in solvent, brush the valves clean.
After cleaning, depress trigger to retract spool valve.
For Nordson EFD sales and service in over
40 countries, contact Nordson EFD or go to
www.nordsonefd.com.
Global
800-556-3484; +1-401-431-7000
info@nordsonefd.com
Europe
00800 7001 7001
infoefd.europe@nordsonefd.com
Asia
China: +86 (21) 3866 9006; china@nordsonefd.com
India: +91 80 4021 3600; india@nordsonefd.com
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SEAsia: +65 6796 9522; sin-mal@nordsonefd.com
Viton is a registered trademark of E.I. DuPont.
The Wave Design is a trademark of Nordson Corporation.
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Series 450 Autovalve / Snuff Back | Instructions / Parts Lists