EFD 790 MAINTENANCE GUIDE

790 Dispense Valve

MAINTENANCE & PARTS GUIDE

IMPORTANT!

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Electronic pdf files of EFD®manuals are also available at
www.efd-inc.com/manuals.html.

For EFD sales and service in over 30 countries,
contact EFD or go to www.efd-inc.com/contact

EFD, Inc.

East Providence, RI USA
800-556-3484; [phone] (outside the USA)
[e-mail] www.efd-inc.com

EFD International Inc.

Dunstable, Bedfordshire, UK
0800 585733 or [phone]
Ireland 00800 8272 9444
[e-mail] www.efd-inc.com

EFD, Inc., Asia

China: [phone]
[e-mail] www.efd-inc.com/cn
Singapore: [phone] [e-mail]

®

A NORDSON COMPANY

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Preventive maintenance with
valve purge compound

The use of valve purge compound
(#6-460-B) between production shifts
or after every eight hours of run time is
highly recommended. The compound
cleans any material residue from the
fluid path and conditions the valve for
future use.

1. Install the barrel of valve purge
compound on the fluid-inlet fitting.

2. Apply reservoir pressure and cycle
the valve until the valve purge
compound has pushed all residual
material from the valve. Leave
the compound in the valve until
future use.

3. To remove the valve purge com­pound, install material to be dis­pensed and cycle valve until all
compound has been pushed from
the valve.

Valve Disassembly
and Reassembly Procedures

www.efd-inc.com [e-mail] USA 800-556-3484 Europe [phone] Asia [phone]

Sales and service of EFD dispensing systems are available worldwide.

Fluid body
retaining nut (2)
#79025R

Inlet fitting

#79005

Auger set screw
Auger seal
#79011 (Viton)
#79011EPR (EPR)

#HM3X3MM

Auger

Spring lock
washer #H4

Fluid body
#79003-SS (stainless)
#79003A (acetal)

#79004-8SS (std. 8 pitch ss)
#79004-16SS (16 pitch ss)
#79004-8A (8 pitch acetal)
#79004-16A (16 pitch acetal)