V250 Valve
Instruction Manual
Form 5206
April 2004
10
from the centered position, causing
damage to the ball, the ball seal (key
11), and the valve (key 1).
Use care when removing the actuator
lever and, if necessary, use a wheel
puller to remove the lever or actuator
from the valve shaft. It is okay to tap
the wheel puller screw lightly to loosen
the lever or actuator, but hitting the
screw with excessive force could also
damage the valve.
1. Remove the cap screws (key 29) from the
actuator mounting yoke and, while referring to the
actuator instruction manual for assistance, remove
the actuator. If appropriate, remove the clamp and
bonding strap assembly (key 40 and 41, figure 3).
2. Remove either the seal protector ring (key 14) or
the flow ring (key 14) from the inlet end of the valve
assembly by following steps 1, 2, and 3 of the
Replacing Ball Seal or Flow Ring section. For dual
seal constructions, note that this procedure should
be repeated on the outlet end of the valve.
3. Proceed as appropriate:
D
For single seal constructions and flow ring
constructions (figure 11 only), remove the cap
screws (key 27).
D
Then, remove the valve outlet (key 5) and
gasket (key 12).
Note
Perform the following step with the
inlet end of the valve assembly facing
upward and with the ball (key 2) in the
fully open position.
4. Remove the hex nuts (key 8) from the follower
shaft (key 7) side of the valve. Then remove the seal
carrier (key 3). Inspect and replace the seal (key 16)
and O-ring (key 23) if necessary.
Note
During the following step, it may be
necessary to apply heat to the retainer
screw (key 32) to disengage the
Loctite No. 271 sealant (key 30) that
holds the retainer screw in place.
Table 4. Shaft Retainer and Retainer Screw Torques
VALVE
N
S
m
Lbf
S
Ft
VALVE
SIZE,
INCHES
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
12,300
68
9075
50
5. Remove the retainer screw (key 32).
6. Using a soft-faced hammer to prevent damaging
the end of the follower shaft (key 7), drive the
follower shaft into the flow bore of the ball just
enough so that the split ring (key 31) can be
removed. Then remove the split ring.
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
Loctite No. 271 sealant (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.
