Instruction Manual
D101554X012
Vee-Ball Valves
June 2017
43
Key numbers in this procedure are shown in figures 24, 26, and 30, unless otherwise indicated. A taper key (key 4,
figure 14) is used in NPS 3 through 12 Non‐Series B valves.
3. Carefully rotate the ball to the open position after the actuator is disconnected. Make sure the ball will not rotate
(see warning above). Provide support for the ball during the following disassembly.
4. Unscrew the pipe plug (key 25). (With newer valve constructions, the pipe plug is optional and may not be
available.)
5. Working from the small end of the groove pin (key 7), use a pin punch to drive the groove pin out of the ball ear and
follower shaft.
For tack welded taper keys, driving the taper key out of the ball ear will shear the tack welding.
6. Locate the small end of the taper key (key 4, see figure 14). Using a pin punch on the smaller end of the taper key,
drive it out of the ball (key 2) and drive shaft (key 6). Note: driving the taper key in the wrong direction will tighten
it.
7. Pull the drive shaft (key 6) out of the actuator side of the valve body.
8. Make sure the sealing surface of the ball is not damaged while removing the follower shaft.
a. If a pipe plug (key 25) is installed, use a punch to drive the follower shaft (key 9) into the center of the ball.
b. If a pipe plug is not
installed, use a piece of continuous threaded rod as a removal rod when moving the follower
shaft (key 9) into the center of the V‐notch ball. Refer to the table 8 for a description of the size threaded rod
needed. The length of the rod should allow easy working room from the valve body.
9. Remove the ball (key 2) by carefully removing the follower shaft and ball from the valve body.
10. Remove the packing box spacer (key 34) for NPS 8, 10, and 12 valves.
11. Removing the bearings (key 10):
a. For composition bearings, remove the bearings by hand. If the bearings are tight in the valve body, then pull or
drive them out with a slight pressure. Allow the bushings (key 5 or 8) to remain in the valve body.
Table 8. Continuous Threaded Rod
Valve Size, NPS Threaded Rod Thread Size Thread Depth in Follower Shaft
3 1/4‐20 0.5
4 1/4‐20 0.5
6 1/4‐20 0.5
8 5/16‐18 0.62
10 5/16‐18 0.62
12 5/16‐18 0.94
b. For metal bearings, use a press and ram to remove the drive shaft bearings out of the valve body. Refer to figures
28 and 29 ram dimensions. The bushings (key 5 or 8) will normally remain in the valve body.
To remove the follower shaft bearings, use a blind‐hole bearing puller. If you do not have such a tool, you can machine
the bearing out.
Note
For proper shutoff performance, the ball and seal require the bearing (key 10) to be positioned correctly. If you removed the
bearings (key 10), be sure to locate the new bearings as shown in figures 28 and 29.
12. Thoroughly clean surfaces of all parts that are to be re‐used or obtain replacement parts.
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