Fisher CV500 Instruction Manual page 19

Instruction Manual
D101640X012
CAUTION
To avoid damage to O‐rings resulting from contact with sharp edges within the bearing holes, use appropriate care when
installing the O‐rings.
3. Slide the bearing for the follower shaft (key 6) located opposite the packing box and, if used, O‐rings (keys 19 and
20) into the valve body. For NPS 10 and 12, make certain the groove located on the outside diameter of the bearing
is positioned towards the bottom flange side of the valve body.
4. Slide the bearing located on the packing box side (key 6 for NPS 3 through 8 and key 42 for NPS 10 and 12) into the
valve body and against the bearing stop.
5. For NPS 3 through 8, inspect the drive shaft (key 3). Insert the shaft end opposite the splined end into the packing
box and through the bearing that was previously installed in the packing box in step 4. Stop before the drive shaft
enters the main valve body cavity. Support the splined end of the shaft.
For NPS 10 and 12, inspect the drive shaft (key 3). Insert the splined shaft end with the groove pin hole into the
packing box and through the bearing that was previously installed in step 4. Stop before the drive shaft enters the
main valve body cavity. Support the end of the drive shaft that extends out from the valve body.
6. For NPS 3 and 4, insert the follower shaft through the outside of the ear of the V‐notch ball that has the smaller
diameter (non‐stepped) hole. Push the follower shaft through the ear until the end of the follower shaft with the
groove pin hole is between the ears and the other end of the follower shaft is flush with the outside edge of the ear.
Place the ball in the valve body cavity with the ear containing the follower shaft adjacent to the follower shaft bore.
Slide the follower shaft through the ear of the ball and into the bearing (key 6) which was previously installed in step
3.
For NPS 6 and 8, locate the smaller diameter hole in the V‐notch ball ear. Place the ball in the valve body cavity with the
ear containing the smaller diameter hole adjacent to the follower shaft bore. Place the follower shaft between the ears
of the ball. Slide the follower shaft through the ear of ball and into the bearing (key 6) that was previously installed in
step 3.
For NPS 10 and 12, place the ball in the valve body cavity. Slide the follower shaft, splined end first, through the
bearing (key 6) that was previously installed in step 3, and into the ear of the ball. Align the groove pin hole in the
follower shaft with the hole in the ball ear.
7. For NPS 3 through 8, position the ball so that the larger hole is facing up, away from the seat ring and retainer.
Determine the correct orientation of the V‐notch ball (key 2) required by the specific installation orientation of the
valve and the flow direction of the process fluid. See figure 2.
For NPS 10 and 12, determine the correct orientation of the V‐notch ball (key 2) required by the specific installation
orientation of the valve and the flow direction of the process fluid. See figure 2. The groove pin hole in both the drive
shaft (key 3) and the ear of the ball are offset from center. Make certain the holes will align.
Note
Before proceeding, inspect the V‐notch ball position once again to ensure the correct orientation. If the ball is not properly
installed, it will not rotate properly and will not shutoff in service.
CV500 Valve
June 2017
19