Instruction Manual
D103302X012
A81 Valve
January 2011
18
Actuator Mounting
With the valve body out of the line, mount the actuator on the valve body in accordance with the instructions in the
actuator instruction manual. Mount the actuator yoke to the valve body, and tighten the actuator‐mounting cap
screws and nuts (keys 35 and 36) to the appropriate torque from table 8.
Key numbers in this procedure are shown in figure 9 unless otherwise indicated.
CAUTION
A81 valve disk rotation is counterclockwise to open (when viewed from the actuator side of the valve body, see figure 7).
Rotating the disk (key 3) past the fully closed position will damage the seal ring (key 4). To prevent this damage, make
certain the actuator travel stop prevents the disk from rotating past the fully closed position.
1. Adjust the actuator to bring the disk to the fully closed position at the end of the actuator stroke. To determine the
fully closed disk position, measure the distances between the disk face and the seal retainer face at the top and
bottom of the valve (X1 and X2) as shown in figure 7. Adjust the travel stops to rotate the disk slightly until the two
measurements are within 0.8 mm (0.032 inch) of each other. Refer to the appropriate actuator instruction manual
for assistance.
Parts Ordering
When corresponding with your Emerson Process Management sales office about this equipment, always mention the
valve serial number. When ordering replacement parts, also specify the key number, part name, desired material,
using the Parts List table.
WARNING
Use only genuine Fisher replacement parts. Components that are not supplied by Emerson Process Management should not,
under any circumstances, be used in any Fisher valve, because they may void your warranty, might adversely affect the
performance of the valve, and could cause personal injury and property damage.
Note
Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes responsibility for the selection, use, or
maintenance of any product. Responsibility for the selection, use, and maintenance of any product remains with the purchaser and
end user.
