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9500 Valve
Instruction Manual
Form 2433
November 2007
10
b. If installing a new shaft, insert the new shaft
into the valve body and disc. Measure between
the valve body and the splined end of the shaft.
Make certain that the distance is correct to
engage the actuator coupling lever.
Be certain that the flat spot or index mark on the end
of the shaft is positioned as shown in figure 2.
6. Use a drill or center punch to mark the taper pin
holes in the shaft. Remove the shaft and disc from
the valve body.
7. Taper pins used in Type 9500 valve shaft and
disc are American Standard taper pins as shown in
table 5. Using the disc as a guide, drill taper pin
holes through the shaft using drill size shown in
table 5.
8. Use an American Standard taper pin reamer to
ream the shaft holes. Be certain the reamer is of
sufficient length for the disc hub thickness. Insert the
shaft into the disc when reaming so the disc holes
can be used as a gauge for reaming. Allow the
reamer to just begin reaming the disc holes. This will
ensure proper seating of the pins.
9. Install the disc and shaft into the valve body. Be
sure the splined end of the shaft is on the actuator
side of the valve body, that the direction of taper in
the taper pin holes match, and that the flat spot or
zero mark is positioned as shown in figure 2.
10. Using a metal sealing compound on the pins for a
positive seal, insert the taper pins into the larger end
of the taper pin holes. Drive the pins with a hammer to
seat the pins.
11. Attach the thrust plates (key 9) with cap screws
(key 10). When tightening the cap screws, do so in
small increments, alternating from one cap screw to
another and from one valve side to the other.
Tighten the cap screws until the thrust plates contact
the thrust sleeve assemblies snugly. Then rotate the
cap screws enough to move the thrust plates 0.8
mm (1/32 inch) closer to the valve body.
12. Re-attach the actuator according to the steps in
the Actuator Mounting section; then install the valve
according to the steps in the Installation section.
Actuator Mounting
1. Refer to the appropriate actuator instruction
manual to determine the desired actuator mounting
style and position. With the valve out of the line,
mount the actuator on the valve per instructions in
the actuator instruction manual.
2. To determine the fully closed disc position,
measure the distances between the valve face and
the top and bottom edges of the disc as shown in
figure 2. The disc is at the fully closed position when
the two measurements are equal. Rotate the disc
slightly if necessary to make the measurements
equal.
3. Refer to figure 6 and locate the view that depicts
the mounting style and position that is being used. In
the appropriate view on the right of figure 6, note the
positions of the index marks on the end of the valve
shaft and actuator lever. For all positions and styles
with 90-degree disc rotation, the shaft index mark is
to be aligned with the appropriate lever index mark
as shown in figure 6. This is also true for
push-down-to-open action with 60-degree maximum
disc rotation. However, for push-down-to-close
action with 60-degree maximum disc rotation, the
appropriate lever index mark must be offset one or
two spline teeth counterclockwise from the shaft
index mark.
Refer to the appropriate actuator instruction manual
for instructions covering attaching the lever and
adjusting the turnbuckle. For Fishtail discs, be
certain that the direction of rotation will be such that
the tail of the disc (see figure 2) will rotate into the
downstream side of the valve.
Changing Disc Rotation and
Action
Disc 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 discs, it will be
necessary to rotate the disc 180
degrees so that the tail of the disc will
rotate into the downstream side of the
valve.
Use the following procedure.