Emerson Fisher V150E, Инструкция по эксплуатации

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Instruction Manual
D103435X012
V150E Valve
July 2017
12
Bearing and Ball Maintenance
WARNING
Before performing the steps in this section, observe the WARNING at the beginning of the Maintenance section on page 5.
Procedures for disassembly and assembly of the bearings and ball cannot be accomplished until the shaft 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.
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 5 and 10, unless otherwise indicated.
1. A taper key (key 4) is used to connect the ball and drive shaft.
2. 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.
3. Working from the small end of the groove pin (key 7), use a pin punch to drive the groove pin out of the ball ear and
follower shaft.
For tack welded taper keys, driving the taper key out of the ball ear will shear the tack welding.
4. Locate the small end of the taper key (key 4 ). Using a pin punch on the smaller end of the taper key, drive it out of
the ball (key 2) and drive shaft (key 6). Note: driving the taper key in the wrong direction will tighten it.
5. Pull the drive shaft (key 6) out of the actuator side of the valve body.
CAUTION
Exercise care to avoid damaging components in the following procedure.
6. The ball will be free to move when both shafts are removed. Make sure the sealing surface of the ball is not
damaged while removing the follower shaft.
7. Use a piece of continuous threaded rod as a removal rod when moving the follower shaft (key 9) into the center of
the ball. Refer to table 3 for a description of the size threaded rod needed. The length of the rod should allow easy
working room from the valve body.
Table 3. Continuous Threaded Rod
Valve Size, NPS Threaded Rod Thread Size Thread Depth in Follower Shaft, Inches
3x4 1/4-20 0.5
4x6 1/4-20 0.5
6x8 1/4-20 0.5
8x10 5/16-18 0.62
10x12 5/16-18 0.62