EFD 750V MAINTENANCE GUIDE

750V, 750V-SS and 751V
Dispense Valves

MAINTENANCE & PARTS GUIDE

IMPORTANT!

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Supervisors

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

Fluid Body

1. Remove the two retainer screws.

2. To reinstall the fluid body, align fluid
body holes with diaphragm and air
cylinder body holes and reinsert
retainer screws. Tighten in accor­dance with the following torque
specifications:

newton

Fluid body meters (inch pounds)

Acetal (black) 1.58 Nm (14 inch pounds)
UHMW*(yellow) 0.79 Nm (7 inch pounds)
Stainless steel 1.58 Nm (14 inch pounds)

*

Ultra High Molecular Weight

Diaphragm

3. Back-out stroke control knob two
turns counterclockwise from the
closed position.

4. Remove fluid body.

5. Unscrew diaphragm (counter­clockwise) and remove it from
the piston rod.

6. Thread-on the new diaphragm
and tighten with medium pressure.

7. Align the holes of the diaphragm
with the appropriate holes in the
air cylinder body by inserting a
flat tip screwdriver through the
hole in the stroke control knob
and engage piston rod slot.

8. Rotate rod, piston and diaphragm
assembly clockwise until holes
are aligned.

9. Reinstall fluid body.

10. Turn stroke control knob clock­wise until closed, and then
reopen to approximate stroke.

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Valve Disassembly and
Reassembly Procedures

CAUTION: To prevent damage, the valve
must be disassembled starting at the fluid
outlet end of the valve.

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

Sales and service of EFD dispensing systems are available worldwide.

751V assembly

Fluid inlet fitting

Fluid inlet fitting

Fluid body

Tip
Adapter

(2) Retainer
screws
#7524

Tip Adapter

Fluid body

Diaphragm
UHMW