Emerson Fisher Vee-Ball V200U Series, Инструкция по эксплуатации

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Instruction Manual
D104548X012
V200U Valve
May 2020
8
Disassembly
WARNING
Observe the steps in the WARNING at the beginning of the Maintenance section.
1. Isolate the control valve from the line pressure, release pressure from both sides of the valve body, and drain the
process media from both sides of the valve. If using a power actuator, shut off all pressure lines to the power
actuator, release pressure from the actuator, and disconnect the pressure lines from the actuator. Use lock‐out
procedures to be sure that the above measures stay in effect while you are working on the equipment.
2. To avoid potential interference with the valve outlet end pipe flange, the V200U ball should be in the closed
position prior to removal.
3. Remove line bolting, remove the control valve from the pipeline, and place the valve/actuator assembly on a flat
surface with the seal protector ring facing up.
4. Remove the actuator cover. Take note of the orientation of the actuator with respect to the valve body and the
lever orientation with respect to the valve drive shaft (see figure 12) for Fisher actuation.
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
.
CAUTION
When removing the actuator from the valve, do not use a hammer or similar tool to drive the lever or actuator off the valve
shaft. Driving the lever or actuator off the valve shaft could damage the ball, seal, and valve.
If necessary, use a puller to remove the lever or actuator from the valve shaft. It is okay to tap the puller screw lightly to
loosen lever or actuator, but hitting the screw with excessive force could damage the ball, seal, and valve.
5. Remove the clamped lever (do not loosen the actuator turnbuckle adjustment), remove the actuator mounting
screws and nuts (keys 23 and 24), and remove the actuator. (If necessary, refer to the actuator instruction manual
for assistance.)
6. If applicable, remove the bonding strap assembly before attempting to remove the packing (see figure 2).
7. Remove the packing follower nuts and packing follower (keys 17 and 20). For alloy packing constructions, the
packing follower (key 17) and a separate packing flange (key 40) must be removed if present.
If the valve is equipped with the ENVIRO‐SEAL packing system, refer to the ENVIRO‐SEAL Packing System for Rotary
Valves instruction manual (
D101643X012 ) for disassembly.
WARNING
Personal injury could result from packing leakage. Do not scratch the drive shaft or packing box wall while removing
packing parts in the following procedure.