Instruction Manual

Instruction Manual
D101554X012
Vee-Ball Valves
January 2015
23
Figure 15. Typical Metal Micro-Notch Ball and Drive Shaft
MICRO-NOTCH
V-NOTCH BALL
DRIVE SHAFT
W6256
For all constructions: Refer to Replacing the Ball Seal, Packing Maintenance, and other procedures as necessary to
complete the assembly of the valve.
NPS 1 through 2
Procedures for disassembly and assembly of the bearings and ball cannot be accomplished until the ball seal and valve
packing are removed from the valve.
Refer to the Replacing Packing procedures to remove the actuator, and to remove the packing flange and packing
follower from the valve. When the packing disassembly steps are complete, return to this section.
Refer to the Replacing the Ball Seal procedures to remove the ball seal from t he valve.
Disassembly
WARNING
When the actuator is removed from the valve, the ball/shaft assembly may suddenly rotate, with a shearing, cutting
motion, which could result in personal injury. To avoid injury, carefully rotate the ball to a stable position at the bottom of
the valve body cavity. Make sure the ball will not rotate.
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: Ascrew
(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 s mall amount of heat can be applied to help loosen the adhesive. H owever,
excessive heat may damage other valve component parts.
b. Oncetheshaftshavebeenremovedfromthevalvebody,theballmayfall.Toavoidpersonalinjuryordamageto
the sealing surfaces, provide support for the ball to prevent it from falling as the shaft(s) are being removed.