Fisher-Rosemount Design CV500, Instruction Manual

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Design CV500
16
Figure 10. Taper and Expansion Pin Insertion
into Ball and Drive Shaft
E0576 / IL
PINS GO IN FROM
THIS END (LARGER HOLE)
SLASH MARK
ON SPLINED
END OF SHAFT
7. For 3 through 8-inch sizes, 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 3.
For 10 and 12-inch sizes, 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 3. 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 insure the
correct orientation. If the ball is not
properly installed, it will not rotate
properly and will not shutoff in service.
8. Hold the thrust washer (key 12) between the ball
(key 2) and the bearing installed next to the packing
(key 6 for 3 through 8-inch sizes and key 42 for 10 and
12-inch sizes.
For 10 and 12-inch sizes, 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 3 through 8-inch sizes, 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 10.
Note
When the valve drive shaft is correctly
positioned for 3 through 8-inch sizes,
the slash mark on the splined end will be
parallel with the ball shutoff surface. See
figure 10. Step 9 is not required for 10
and 12-inch sizes 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.
12. Secure the ball to the drive shaft (key 3) as
follows:
D
For 3 through 8-inch sizes:
a. The groove pin holes in both the drive shaft
(key 3) and the ear of the ball are offset from
center. Make certain the holes in the ear of the ball
will align with the hole in the drive shaft. Secure the
ball to the drive shaft by using pin punches and
driving in the groove pin until it is flush with the
surface of the ball ear. Make certain that the
groove pin goes completely.
Note
If the holes in the ball ear do not line up
with the hole in the drive shaft, check
the slash mark on the splined end of the
shaft. Make sure the shaft and ball are
properly oriented.
b. Place the chamfered end of the expansion pin
(key 9) into the larger hole in the ball ear (see
figure 10).
CAUTION
To avoid damage to the expansion pin,
ball, or drive shaft resulting from the
application of excessive force on the
expansion pin, use appropriate care
when driving the expansion pin through