Fisher CV500 Instruction Manual page 20

CV500 Valve
June 2017
8. Hold the thrust washer (key 12) between the ball (key 2) and the bearing installed next to the packing (key 6 for NPS
3 through 8 and key 42 for NPS 10 and 12).
Note
To obtain the correct thickness, two thrust washers (key 12) are needed when using 17‐7PH. When using alloy 6, only one thrust
washer is needed to get the correct thickness.
For NPS 10 and 12, align the zero mark located on the end of the drive shaft with the zero mark located on the ball ear.
For all sizes, slide the valve drive shaft (key 3) from the packing box into the valve body through the thrust washer and
into the ear of the ball.
9. For NPS 3 through 8, secure the ball in the correct open position. Locate the slash mark on the splined end of the
valve drive shaft. Rotate the drive shaft until the slash mark is vertical and facing out from the center of the shaft in
the same direction as the ball seating surface. See figure 8.
Figure 8. Taper and Expansion Pin Insertion into Ball and Drive Shaft
BENCH
E0576
Note
When the valve drive shaft is correctly positioned for NPS 3 through 8, the slash mark on the splined end will be parallel with the
ball shutoff surface. See figure 8. If the ball is not properly aligned with the slash mark, the valve will not function correctly.
Step 9 is not required for NPS 10 and 12 because the drive shaft and the ear of the ball are both splined and were aligned in step 8.
10. Secure the ball to the follower shaft by aligning the groove pin hole in the ball ear and the hole on the opposite side
of this ear with the groove pin hole through the follower shaft (key 38).
11. Use pin punches to drive in the groove pin until it is flush with the surface of the ball ear. Stake both ends of the pin
hole in the ball ear to retain the pin during this step.
20
PINS GO IN FROM
THIS END (LARGER HOLE)
SLASH MARK
ON SPLINED
END OF SHAFT
Instruction Manual
D101640X012