Actuator Mounting - Fisher A41 Instruction Manual

8. Install the packing according to the appropriate instructions presented in steps 5 through 8 of the Replacing
Packing section.
9. Drive in the taper pins securely.
10. Rotate the disc to the closed position.
To install the seal ring and complete the assembly, follow the procedures presented in steps 5 through 9 of the
Replacing Seal Ring section.

Actuator Mounting

Re-install the seal ring and packing rings using the appropriate procedures before installing the actuator or handlever.
Mount the actuator on the valve in accordance with the Actuator Mounting section in the actuator or handlever
instruction manual.
In the Packing Maintenance/Removing the Actuator steps, you should have noted the position of the mark on the end
of the valve shaft, and its relationship to the actuator shaft. If not, determine the configuration needed to match your
application.
Be certain that the disc is rotating counterclockwise to open when viewed from the actuator side of the valve and that
the disc is not rotated beyond its limits.
1. Orientate the valve drive shaft correctly to match the actuator or handlever position, install the actuator coupling,
and hold it in place while matching the actuator mounting pads with each other.
2. Tighten the actuator-mounting cap screws to the appropriate bolt torque from table 6.
CAUTION
The valve disc travel stop in the valve body bore is not to be used as a power actuator travel stop (see figure 7). Use the
actuator travel stops to limit the rotation of the valve disc. It is possible damage to the valve component parts may occur if
full actuator thrust is applied to the valve disc travel stop.
Note
To obtain proper shutoff, the closed position of the A41/8560 valves must be set with the disc parallel to the retaining ring. Don't
use the disc stop to set the actuator travel stops.
3. Adjust the actuator travel stop to limit the open and closed positions of the valve disc. (If necessary, refer to the
actuator instruction manual for more information about adjustments.) Do not use the disc stop as a actuator travel
stop as discussed in the Caution above.
4. For actuators with adjustable turnbuckles, adjust the turnbuckle to bring the disc to the fully closed position at the
end of the actuator stroke. If necessary, refer to the appropriate actuator instruction manual for assistance.
5. If using a manual handwheel or handlever actuator, refer to the appropriate actuator instruction manual for
mounting positions and adjustments.
6. To determine the fully closed disc position (zero degrees of disc rotation), measure the distances between the
positions on the disc face as shown in figure 7. Use the actuator to rotate the disc while re-checking the two
measurements. Repeat adjustment until the two measurements are equal.
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