efd 752v Guida Utente

Diaphragm

Fluid
body

Tip adapter

(2) Retainer 
screws
#7524

Fluid inlet fitting

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

Air input hose & fitting
#78518A

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

Piston O-ring
#7519

1. Remove the two retainer screws.

2. To reinstall the fluid body, align

fluid body holes with diaphragm
and cylinder body holes and rein-
sert retainer screws. Tighten in
accordance with the following
torque specifications:

3. Back out stroke control knob 

two turns
counterclockwise from the 
closed position.

4. Remove fluid body.

5. Unscrew diaphragm (counter-

clockwise) 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.

Valve Disassembly and
Reassembly Procedures

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

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