Step Procedure
1 Pull the auto/manual switching pin out of its holder, and disengage the chain that
holds the handwheel.
2
Check
“Figure 7-3. Operation instruction label”on the handwheel, and turn the
handwheel in the SHUT direction to lower the slide screw.
3 Align the round hole of the slide screw with that of the actuator rod, and insert the
switching pin all the way, and then turn the pin to fix it.
4 Check the OPEN and SHUT arrows shown on the operation instruction label, and rotate
the handwheel in the desired direction in order to open or close the valve. The turning
torque should be 127 N (13 kgf) or less.
5 When the handwheel does not turn any further, stop trying to turn it and check the
amount of valve travel.
CAUTION
Do not apply excessive force when the mechanical stop posi-
tion of the control valve has been reached. Otherwise you may
damage the valve stem. If the valve stops at an abnormal posi-
tion, refer to “3-3. Troubleshooting” and take the necessary
countermeasures.
6 To resume automatic operation, remove the switching pin and turn the handwheel
until the slide screw rotation lock reaches the AUTO position of the indicator (see the
figure below).
Run the chain attached to the pin through the handwheel in order to restrict its move-
ment, and then set the pin into its holder.
After checking the position of these parts, resume automatic operation.
Figure 7-4.
7-4
To Next Page
Loading...
Need help?
General
