CV500 Valve
Instruction Manual
Form 5302
July 2006
17
box in step 4. Stop before the drive shaft enters the
main valve body cavity. Support the splined end of
the shaft.
For 10- and 12-inch sizes,
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 3- and 4-inch sizes,
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 6- and 8-inch sizes,
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 10- and 12-inch sizes,
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 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.
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
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.
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).
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 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.
