Instruction Manual
D101554X012
Vee-Ball Valves
March 2021
29
Carefully install the ball into the valve body cavity.
After you have installed the ball (key 2) into the valve body assembly, firmly support the ball while installing the shafts.
4.
Installing the follower shaft (key 9):
D
For NPS 1 through 2 valves:
The follower shaft (key 9) should already have been inserted into the ball before the ball
was put into the valve body. Insert the follower shaft (key 9) into the valve body bearing (key 10).
Note
All NPS 1 Micro‐Notch constructions use a one piece shaft. They do not have a follower shaft.
5.
Installing the Drive Shaft for Valves with Taper Pins
CAUTION
The drive shaft must be used with the correct Vee‐Ball. Refer to the tag (see figure 13) attached to the Vee‐Ball and to the
drive shaft.
Failure to use the correct Vee‐Ball/ shaft combination may result in the ball not being in the position indicated by the slash
mark on the end of the shaft. If the ball is not properly aligned with the slash mark, the valve will not function correctly and
seal damage may result.
Figure 19. Location of Indicator Hole in Micro‐Notch Vee‐Balls
FOLLOWER END OF BALL
SHAFT/ASSEMBLY
29B9552‐A
E0764
INDICATOR HOLE
NOTCH
CAUTION
Make sure the drive shaft is free of oil or grease, otherwise the taper pin will not seat properly. Failure to properly set the
taper pin or taper key could result in it coming loose while in service. Loosening of the taper key in service could result in
improper valve function and equipment damage.
