Instruction Manual
Instruction Manual
D100422X012
V250 Valve
September 2013
13
Table 4. Shaft Retainer and Retainer Screw Torques
VALVE SIZE,
NPS
NSm LbfSFt
Shaft Retainer
(Key 25)
Retainer Screw
(Key 32)
Shaft Retainer
(Key 25)
Retainer Screw
(Key 32)
4 136 27 100 20
6 759 27 560 20
8 1390 41 1025 30
10 1760 41 1295 30
12 2390 68 1760 50
16 3830 68 2825 50
20 6660 68 4910 50
24 12300 68 9075 50
7. Remove the follower shaft (key 7), the spacer (key 22), the bushing spacer shims (key 18), the bushing (key 20), the
thrust washer (key 19), and the thrust spacer (key 21) from the valve.
8. Insert a ball support post (see figure 7) into the follower shaft (key 7) bore of the valve. Use of the ball support post
will ensure that the ball sealing surfaces will not get damaged as the shaft retainer (key 25) is being removed.
Position the ball support post so that the ball will be supported firmly inside the valve body cavity during the
performance of the next three steps.
Note
During the following step, it may be necessary to apply heat to the shaft retainer (key 25) to disengage the thread locking adhesive
(high strength) (key 30) that holds the shaft retainer in place.
9. Remove the shaft retainer (key 25) and the washer (key 24).
10. Remove the hex nuts (key 8) from the drive shaft (key 6) side of the valve. Then remove the seal carrier (key 17).
Inspect and replace the seal (key 16) and O-Ring (key 23) if necessary.
11. With the ball firmly supported, remove the drive shaft (key 6) and attached parts out of the valve. Attached parts
will include the spacer (key 22), the bushing spacer shims (key 18), the bushing (key 20), the thrust washer (key 19),
and the thrust spacer (key 21).
12. While maintaining firm support of the ball (key 2), proceed as follows:
D First, remove the ball s upport post through the follower shaft bore of the valve.
D Then, while being careful not to damage the sealing surfaces of the ball, remove the ball through the outlet end of
the valve.
13. Inspect and, if necessary, replace all parts. Then, proceed to the assembly procedure below.