Nordson_EFD_Series_450_Instructions
Series 450 Autovalve / Snuff Back Instructions / Parts Lists Electronic pdf files of Nordson EFD manuals are also available at www.nordsonefd.com ™ Maximum operating pressure 235 bar (3500 psi)
Series 450 Autovalve / Snuff Back
Instructions / Parts Lists
Electronic pdf files of Nordson EFD
manuals are also available at
www.nordsonefd.com
™
Maximum operating pressure
235 bar (3500 psi)
Series 450 Autovalve / Snuff Back | Instructions / Parts Lists
2 www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.
Contents
Contents ........................................................................................................................................................................................ 2
Operation .......................................................................................................................................................................................3
Installation .....................................................................................................................................................................................4
Connect Supply Lines ................................................................................................................................................................4
Startup .......................................................................................................................................................................................4
Maintenance ..................................................................................................................................................................................4
Routine Maintenance .................................................................................................................................................................4
Disassembly And Cleaning ........................................................................................................................................................ 6
Rebuilding the Autovalve ........................................................................................................................................................... 6
Final QC Check ..........................................................................................................................................................................6
Manifolds for Series 160 Disposable Mixers .................................................................................................................................8
Mount ............................................................................................................................................................................................9
Hand Held with Pneumatic Switch #7701977 ...........................................................................................................................9
#7701971 Hand Held — Electric Momentary Switch (24 Volt)
#7701973 Hand Held — Electric Push On / Off Switch (24 Volt) ............................................................................................10
Air Cylinder — #7702265 Hardened SS Shafts ...........................................................................................................................11
450 Autovalve with Snuff-Back ................................................................................................................................................... 12
Spare Parts Kits ..........................................................................................................................................................................12
Accessories ................................................................................................................................................................................. 13
Hose Fittings for 450 Valves .................................................................................................................................................... 13
Ratio Check Cap ......................................................................................................................................................................14
Night Cap .................................................................................................................................................................................14
Troubleshooting ..........................................................................................................................................................................15
Series 450 Autovalve / Snuff Back | Instructions / Parts Lists
3www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.
Operation
The ON-OFF operation of the valve is controlled by movement of the piston inside the air cylinder (1).
In the OFF position, the piston retracts and the dual spool valves (75) seat into the front lip seals (3) which are located inside
the seat plate (8).
In the ON position, the piston and the spool valves move forward (75) which allows A & B fluids to pass through the manifold.
To eliminate drooling or stringing of the adhesive out of the mix tube, the spool valves (75) can be retracted through the front
lip seals (3). This snuff-back action is controlled by the adjustment screw (70) on the back of the air cylinder (1).
The snuff-back should be adjusted so the fluid just stops at the end of the mixing tube. Excessive snuff-back will cause
premature plugging of the valve.
A disposable Series 160 mixer can be attached to the manifold. If the operating pressure exceeds 10bar (150psi), we
recommend a metal jacket be used over the plastic mix tube. Refer to Catalog for details.
NOTE: For all reference numbers in parenthesis, see pages 7–11.
Your 450 AUTOVALVE in general...
• Designed to dispense two-component adhesives and sealants..
• Dispenses low or high viscosity urethanes, epoxies and silicones.
• Can be mounted for beads or timed shots; optional handle is available for hand held applications.
• Provides an ON-OFF function. The metering of the adhesives in the proper ratio of A:B is controlled by the metering
pumps.A stationary mount or gantry installation requires a swivel mounting bracket. To complete purging, turn the valve
with the mixer pointing up and dispense A & B.