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Fisher V260 User Manual

Fisher V260
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Instruction Manual
D102178X012
V260 Valve
July 2017
8
See the WARNING at the beginning of the Maintenance section for more information before removing the valve from the
pipeline.
Disassemble the valve only to the extent necessary to accomplish the needed inspection and repairs. For some repairs
(for example, the trim parts only) complete disassembly of the valve is not necessary. Follow the disassembly
procedures to the point necessary to accomplish the repair, then skip to the appropriate assembly steps to complete
the reassembly of the valve. Always clean and protect sealing surfaces from damage.
Mark parts as necessary to allow them to be returned to the same position as removed. For example: Be sure to return
the tailpiece to the same end of the valve from which it was removed. Also, the seal assembly within the tailpiece
should be returned to the same tailpiece from which it was removed. The bearing plates should be marked and
reinstalled on the ball in the same position as they were, when removed.
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 work on the equipment.
2. Remove line bolting, remove the control valve from the pipeline, and clean all valve surfaces. Place the
actuator/valve assembly on a flat working surface.
3. Mark parts as necessary to allow them to be returned to the same position during re‐assembly.
4. Perform the procedure in the Packing Maintenance section to remove the actuator from the valve. When valve
maintenance is complete, refer to the Mounting Actuator procedure at the end of the Maintenance section to
re‐install the actuator on the valve.
5. Provide a clean soft working surface to protect the tailpiece‐flange sealing surface.
a. If the valve does not have an attenuator dome, lift the valve and place it on its side with either tailpiece flange
resting on the flat surface. Be sure the valve is in a stable, upright position before releasing the hoist connection.
b. If the valve has a single attenuator dome, it is best to position the valve body so the tailpiece with the dome is in
the down position. Be sure the valve is stable, in an upward position before releasing the hoist connection.
Note
If the packing is in good condition, it is possible to remove and replace the seal assembly, or dome assembly without removing the
packing box assembly. However, the packing assembly must be removed to remove the ball (key 11) from the valve body.
6. Remove the packing housing nuts (key 23). Remove the packing housing assembly from the valve. The assembly
includes all the packing box parts, drive shaft, O‐ring seals, bearing, and other parts.
7. Remove the nuts from the studs (keys 19 and 3) to remove the tailpiece/valve connection. (Refer to figure 6).
Note
While lifting the tailpiece (key 2 or 6) from the valve body, check to see if the seal assembly is lifting with the tailpiece. (Note:
Some valve constructions do not have a seal assembly installed in the tailpiece.) If it is, slide something between the ball and
tailpiece to protect the ball in case the seal assembly falls out of the tailpiece.
8. If the valve has dual attenuator domes, tap the dome to loosen it from the top tailpiece before the top tailpiece is
lifted from the valve body.

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Fisher V260 Specifications

General IconGeneral
BrandFisher
ModelV260
CategoryControl Unit
LanguageEnglish

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