efd 725da ユーザーガイド

Fluid 
inlet fitting  
#7543BP

Shaft
#72537

Diaphragm
#72536

Shoulder

Fluid body
#72558A-SS

Sealing head 
with screw 
#72557

Body cap
#72543-SS 
includes O-ring

Tip adapter 
#2186BP
1/4 NPT

O-ring
#72540A
(Viton

®

)

Air cylinder

wall ID

Air cylinder
body assembly
#72560A

O-ring 
#72530A 
(Buna)

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

1. 

Put threaded rod in mounting hole.

2. 

Remove body cap.

3. 

Remove sealing head.

*

4. 

With a wrench on the flats of the
air cylinder body, turn to loosen
fluid body. 

5. 

Remove fluid body.

*

Note: For the 725DA-SS or 725DA, valve
set stroke adjustment to the full open
position (two complete rotations). The
stroke adjustment must stay open
throughout reassembly. 

6.  Remove input air hose from 

push-in fitting on air cap.

7.

Insert 1/8” hex wrench through air
inlet hole in cap and back shaft
locking screw out two turns.

*

8.  Using the the hex on the shaft,

unthread shaft, and remove shaft
and diaphragm.

*

9.

Unscrew air cyclinder cap from air
cylinder body.

*

10.  Remove piston and spring.

Note: Stroke adjustment ring on 
the valve air cylinder assembly is
not removable. If this assembly
requires repair, it must be
returned to EFD.

Valve Disassembly and
Reassembly Procedures

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