Instruction Manual

Instruction Manual
D101554X012
Vee-Ball Valves
January 2015
48
12. Thoroughly clean surfaces of all parts that are to be re-used or obtain replacement parts.
Assembly
1. Inspect all sealing surfaces to ensure they are in good condition and without scratches or wear.
2. Installing bearings (key 10):
a. For composition bearings, install the bearings by hand. The bearing flanged end should touch the bushing (key 5
or 8).
b. For metal bearings:
D Use a press and ram to install the bearings (key 10). Refer to figures 29 and 30.
D Press the bearings in until each bearing is flush with the bushing (key 5 or 8). The acceptable tolerance for bearing
location is: flush with the bushing to 1.52 mm (0.060 inches) inside the bushing. That is, the bearings should not
protrude into the flow cavity of the valve, and they should not be more than 1.52 mm (0.060 inches) inside the
bushing.
D Take care not to change the position of the bushings (key 5 or 8) when pressing in new bearings (key 10), otherwise
the ball will not center in the valve body and seal.
3. Installing the Vee-Ball (key 2):
WARNING
The Vee-Ball might be damaged if it is allowed to fall into the valve body. To avoid personal injury or damage to the sealing
surfaces, support the ball to prevent it from falling into or out of the valve body cavity.
Note
For ease of assembly, the follower shaft (key 9) should be inserted into the ball before installing the ball in an NPS 3 valve without
ball/attenuator.
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 3 v alves: The follower shaft (key 9) should already have been inserted into the ballbeforetheballwasput
into the valve body. Insert the follower shaft (key 9) into the valve body bearing (key 10).
D For NPS 4 and larger valves without
attenuator: Insert the follower shaft (key 9) through the ball, and into the valve
body bearing (key 10).
Then for all sizes, align the hole in the follower shaft with the holes in the ball. Insert the small end of the groove pin
(key 7) into the hole in the ball and into the follower shaft. The pin will hold the parts in place while the drive shaft (key
6) is being installed.
5. Insertthedriveshaft(key6)intothevalvebodybearing(key10),andintotheballear.Aligntheholeinthedrive
shaft with the holes in the ball.
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.