5
I.
Modifications for valve ranges SW4 / M4
a. Dismantle the SW4 or M4 valve insert from the valve housing
according to the instructions given in the respective operating
manual.
b. Replace the standard SW4 or M4 guide rod against the extended
guide rod to install the stroke limitation.
II.
Replacement of guide rod
a. Remove the operating cam.
b. Unscrew hexagon nut by holding up the centering disk.
Remove centering disk.
c. Detach valve shaft from actuator.
d. Clamp valve shaft into a vice.
Attention:
Do not damage the valve shaft.
(Use protective bracket.)
e. Take the centering disk and a wrench, size 17 , to remove
the guide rod from the valve shaft.
f. Put the extended guide rod in the shaft.
Tightening torque: 40 Nm
g. Push the valve shaft through the yoke and the actuator.
III.
Assembly of stroke limitation
a. Slide the centering ring on the guide rod.
b. Fasten the pneumatic stroke limitation with yoke by
the 4 hex. screws on the actuator.
c. Attach the centering disk. Screw-on the hex. nut.
Hold up the centering disk for this purpose and fasten the
hex. nut with a tightening torque of 40 Nm.
d. Place the operating cam and tighten it.
e. Secure the valve position indicator.
Install the Control Unit.
6.
Service Instructions
operating cam
centering disk
hex. nut
centering
ring
pneumatic
stroke limitation
actuator
UK
Pneumatic Stroke Limitation
for DELTA SW4 / M4
Operating Manual Rev.0