EFD 752V MAINTENANCE GUIDE

752V Series Diaphragm Valve

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

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Fluid Body

1. Remove the two retainer screws.

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

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.

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

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
desired 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.

(2) Retainer
screws
#7524

Fluid inlet fitting

Air input hose & fitting
#78518A

Piston and rod
includes O-ring (Buna N)
#7518

Tip adapter

Fluid
body

Diaphragm

Air cylinder body
#7527-SS (stainless steel)
#7527 (hard-coated aluminum)

Piston O-ring
#7519