Instruction Manual

Instruction Manual

D101554X012

Vee-Ball Valves

January 2015

Key numbers in this procedure are shown in figures 24, 26, and 31, 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. Locatethesmallendofthetaperkey(key4,seefigure14).Usingapinpunchonthesmallerendofthetaperkey,

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. Pullthedriveshaft(key6)outoftheactuatorsideofthevalvebody.

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 7 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

drivethemoutwithaslightpressure.Allowthebushings(key5or8)toremaininthevalvebody.

Table 7. Continuous Threaded Rod

Valve Size, NPS Threaded Rod Thread Size ThreadDepthinFollowerShaft

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, useapressandramtoremovethedriveshaftbearingsoutofthevalvebody.Refertofigures

29 and 30 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 s eal require the bearing (key 10) to be positioned correctly. If you removed the

bearings (key 10), be s ure to locate the new bearings as shown in figures 29 and 30.