AB-7356-U
11
Procedure to change the actuator mounting position
IMPORTANT:
Do not change the combination of the valve, yoke, and actuator.
Set the port A of the valve and the actuator in 100 % position when changing the mounting position. If the valve
with port A in 0 % position is assembled with the actuator in 100 % position, the actuator puts torque on the
closed port A of the 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 and raised bar shape on the valve bonnet face the same direction.
<Step 1 in Fig. 13>
2) Remove the screws connecting the yoke and the valve. <Step 2 in Fig. 13>
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. <Step 3 in Fig. 13>
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
with bolts. <Step 3 in Fig. 13>
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. 13>
7) Check that the ACTIVAL with the mounting position changed operates smoothly from 0 % position to 100 % position.
Figure 13. 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
Raised bar shape