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794 Series Auger Valve | Operating Manual 3 www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide. Contents Contents ..........................…
794 Series Auger Valve | Operating Manual
2 www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.
You have selected a reliable, high-quality dispensing system from Nordson EFD, the world leader in fluid
dispensing. The 794 auger valve was designed specifically for industrial dispensing and will provide you with
years of trouble-free, productive service.
This manual will help you maximize the usefulness of your 794 auger valve.
Please spend a few minutes to become familiar with the controls and features. Follow our recommended testing
procedures. Review the helpful information we have included, which is based on more than 50years of industrial
dispensing experience.
Most questions you will have are answered in this manual. However, if you need assistance, please do not
hesitate to contact EFD or your authorized EFD distributor. Detailed contact information is provided on the last
page of this document.
The Nordson EFD Pledge
Thank You!
You have just purchased the world’s finest precision dispensing equipment.
I want you to know that all of us at Nordson EFD value your business and will do everything in our power to
make you a satisfied customer.
If at any time you are not fully satisfied with our equipment or the support provided by your Nordson EFD
Product Application Specialist, please contact me personally at 800.556.3484 (US), 401.431.7000 (outside US),
or Ferran.Ayala@nordsonefd.com.
I guarantee that we will resolve any problems to your satisfaction.
Thanks again for choosing Nordson EFD.
Ferran Ayala, Vice President
Ferran
794 Series Auger Valve | Operating Manual
3www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.
Contents
Contents ........................................................................................................................................................................................ 3
Introduction ...................................................................................................................................................................................4
General Information ...................................................................................................................................................................4
Valve Models .............................................................................................................................................................................5
How the Valve Operates ............................................................................................................................................................ 5
Specifications ................................................................................................................................................................................ 6
Packing List ................................................................................................................................................................................... 7
Installation .....................................................................................................................................................................................8
Making Adjustments .................................................................................................................................................................. 8
Changing a Tip ...........................................................................................................................................................................9
Changing the Auger Assembly ..................................................................................................................................................9
Solder Paste ................................................................................................................................................................................ 10
Service .........................................................................................................................................................................................10
Valve Part Numbers .....................................................................................................................................................................10
Replacement Parts ...................................................................................................................................................................... 10
Troubleshooting ..........................................................................................................................................................................11
794 Series Auger Valve | Operating Manual
4 www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.
Introduction
The 794 Auger Valve is a precision dispense valve specifically designed for metering
controlled deposits of solder pastes, thick sealants, and other particle-filled materials.
By combining screw-feed principles with precise time, pressure, and dispensing control,
the 794 valve is able to provide accurate, repeatable deposits without damaging the
metal particles of the solder. These features are not possible with any other type of
conventional control valve.
General Information
It is intended that the 794 auger valve be rigidly mounted to and positioned by a
suitable factory automation system and controlled by a suitable valve controller. See the
“Specifications” section of this manual to select, install, and configure the automation
system and valve controller.
Prohibited Uses
The 794 auger valve should not be operated in the following ways:
• Hand-held
• In damp or wet conditions
• In explosive atmospheres
• Under conditions which violate limits set under “Specifications” on page6
• Without all system guards, interlocks, and other safety features in place and
operational
Warning
It is the responsibility of the factory automation system designer, builder, and / or installer
to include safety features sufficient to prevent personal injury or loss of life during
operation.
Safety Precautions
The 794 auger valve should be installed, configured, and operated only by qualified
personnel who have read and understood all appropriate sections of this manual as well
as the operating instructions supplied with the factory automation system onto which it
is installed. Protective eyewear should always be worn while operating, adjusting, and
servicing the valve. Additional personal protective equipment should be used appropriate
to the material being dispensed. An SDS for all materials to be dispensed should be
available at or near the operator’s station. The factory automation system should be
designed and installed so as to allow the operator to be positioned at a safe distance
while operating and adjusting the valve.