Changing Disk Rotation And Action - Emerson Fisher 9500 Instruction Manual

9500 Valve
February 2019

Changing Disk Rotation and Action

Disk rotation can be changed from 0‐90 degrees or vice versa by changing travel stops in the actuator and, if
necessary, changing the position of the lever on the splined valve shaft. Action can be changed from
push‐down‐to‐open to push‐down‐to‐close by removing the actuator and remounting it in the alternate mounting
style. Refer to the appropriate actuator instruction manual for assistance in disassembly and reassembly to change
travel stops and for instructions to change mounting style.
Note
Action for valves using a splined valve shaft can also be changed, without changing mounting style, by repositioning the actuator
lever on the valve shaft. For FISHTAIL disks, it will be necessary to rotate the disk 180 degrees so that the tail of the disk will rotate
into the downstream side of the valve.
Use the following procedure.
1. Refer to the appropriate actuator instruction manual for assistance in disconnecting and removing the actuator
lever. Avoid disturbing the actuator turnbuckle adjustment, if possible.
2. If the valve disk is a FISHTAIL disk, rotate the disk 180 degrees from the original position.
3. Position the disk in its fully closed position. To ensure that disk is fully closed, measure equal distances between
valve face and top and bottom of the disk as shown in figure 2 or check to be sure that the flat spot or index mark on
the valve shaft is in top‐dead‐center or bottom‐dead‐center in relation to the valve.
WARNING
To avoid personal injury, keep hands away from the actuator rod in the following procedure.
4. Note the position of the valve shaft index mark. Index mark alignments for reversed action are not shown in
figure 6. To determine proper index mark alignment, proceed as follows:
a. Stroke the actuator to the valve‐closed end of travel and retain that position while performing the next step.
b. Keeping hands away from the actuator rod, hold the actuator lever up to the valve shaft so that the lever end is in
line with the actuator rod end bearing. The lever index mark that is most nearly in line with the valve shaft index
mark is the index mark that must be used during reassembly. If changing to push‐down‐to‐close action with
60‐degree operation, the lever index mark will be offset 1 spline tooth from the valve shaft index mark for 12.7
through 19.1 mm (1/2 through 3/4‐inch) valve shafts and 2 spline teeth from the valve shaft index mark for 25.4
and 31.8 mm (1 and 1‐1/4 inch) valve shafts. This offset must be maintained during reassembly.
5. Record the alignment determined in step 4, remove the actuator lever, and shut off operating pressure to actuator.
6. Reassemble the lever to the actuator and adjust the actuator travel, if necessary, referring to the steps in the
appropriate actuator instruction manual. Be sure to use the index mark alignment determined above rather than
those shown in figure 6.
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Instruction Manual
D100380X012