
AB-6675
12
Procedure to change the actuator mounting position
IMPORTANT:
Do not change the combination of the valve, yoke, and actuator.
Set the ACTIVAL (actuator and valve) in 100 % position when changing the mounting position. If the valve in
0 % position is assembled with the actuator in 100 % position, the actuator puts torque on the closed valve, and
the gear of the actuator gets damaged.
1) Remove the screws connecting the actuator and the yoke. Lift the actuator and detach it from the yoke. Make sure that the
mark on the valve stem faces the same direction as the bar shape on the valve bonnet faces. <Step 1 in Fig. 14>
2) Remove the screws connecting the yoke and the valve. <Step 2 in Fig. 14>
3) Change the facing direction of the yoke. The yoke and actuator can be horizontally rotated every 90
(0
/90
/180
/270
from the factory preset position) to mount onto the valve.
4) A thermal insulation sheet is inserted between the yoke and the valve. When changing the mounting positions, reinsert the
sheet and then fit the yoke into the new mounting position.
5) Before fixing the yoke to the valve with the screws, check that the actuator engages correctly with the valve stem (at the new
mounting position). Check that the pointer of the actuator indicates 100 % position as well. Then, fix the yoke to the valve.
<Step 3 in Fig. 14>
6) Mount the actuator. Place the actuator, with its facing direction changed, on the yoke, and fix them with the screws.
<Step 4 in Fig. 14>
7) Check that the ACTIVAL with the mounting position changed operates smoothly (from 0 % to 100 %).
Figure 14. Changing the actuator mounting position
Step 1
Step 4
Lift off the actuator.
Change the actuator mounting
position, and remount the
actuator on the yoke.
Step 2
Step 3
Detach the yoke from the
valve.
Change the yoke mounting
position, and remount the yoke
on the valve.
Thermal insulation sheet
Mark
Valve stem
Bar shape