Instruction Manual
D101554X012
Vee-Ball Valves
June 2017
26
Key numbers in this procedure are shown in figures 24, 25, and 26, unless otherwise indicated.
1. A taper pin
(key 4, figure 20) is used in the NPS 1, 1-1/2, and 2 valves, and in the NPS 1 Metal Micro‐Notch valve
(figure 21).
2. Ceramic Micro Notch ball constructions: A screw
(key 4, figure 22) is used to attach the ball to the drive shaft.
CAUTION
Exercise care to avoid damaging components in the following procedure.
a. The parts are held together with a screw and an adhesive. Remove the screw (key 4) and separate the drive shaft
from the ball. In some cases, a small amount of heat can be applied to help loosen the adhesive. However,
excessive heat may damage other valve component parts.
b. Once the shafts have been removed from the valve body, the ball may fall. To avoid personal injury or damage to
the sealing surfaces, provide support for the ball to prevent it from falling as the shaft(s) are being removed.
Table 7. Continuous Threaded Rod
Valve Size, DN Valve Size, NPS Threaded Rod Thread Size Thread Depth in Follower Shaft
25 1 1/4‐20 0.5
40 1.5 1/4‐20 0.5
50 2 1/4‐20 0.5
Figure 16. Dimensions of Ball in Ball / Shaft Assembly
A
VALVE SIZE
A
NEW - WITHOUT THRUST WASHER OLD - WITH THRUST WASHER
DN NPS mm Inches mm Inches
25 1 32.9 1.29 31.8 1.25
40 1.5 48.6 1.91 47.7 1.88
50 2 64.5 2.54 63.4 2.50
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). (The pipe plug is optional and may not be available.)
To Next Page
Loading...
