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Instruction Manual
D104297X012
7. When the control valve is in operation, carefully examine the packing follower region for any signs of leakage.
Seal Ring Maintenance
WARNING
D See the WARNING at the beginning of the Maintenance section for more information before removing the valve from
the pipeline.
D Use proper lifting and rigging practices while moving the valve or valve/actuator assembly.
Valve Disassembly
Refer to figures 4, 5, and 6 to identify the V270 valve components by key number.
Disassemble the valve only to the extent necessary to accomplish the needed inspection and repairs. For some repairs
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 and orientation as removed. The tailpiece,
for instance, shall be returned to the same end of the valve from which it was removed. The seal assembly shall also be
returned to the same tailpiece and in the same orientation from which it was 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
lockout/tagout procedures to be sure that the above measures stay in effect while working 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. Refer to the appropriate actuator instruction manual for info on removal. Loosen the actuator mounting screws,
bolts, or nuts while properly supporting the actuator then separate the actuator and mounting bracket from the
valve. When valve maintenance is complete, refer to the Mounting Actuator procedure in this manual to reinstall
the actuator on the valve.
5. Provide a clean soft working surface to protect the tailpiece‐flange serrated surface. Lift the valve and place it on
either tailpiece flange face. Be sure the valve is in a stable, upright position before releasing the hoist connection.
Note
If the packing is in good condition, it is possible to remove and replace the seal assembly without removing the packing box
assembly. However, the packing box assembly must be removed to remove the ball (key 3) from the valve body.
6. Remove the packing box housing socket head cap screws (key 10).
a. If necessary, two packing box housing cap screws can be used as jack bolts to assist with separating the packing
box housing assembly from the valve.
b. Remove the two plastic plugs (key 39) from the packing box housing and install two packing box housing cap
screws until contact with the body occurs. Alternatively, and evenly turn each fastener clockwise until the
packing box housing assembly is adequately separated from the valve body. Remove the packing box housing
assembly from the valve body. The packing box housing assembly includes all packing parts, drive shaft (key 4),
V270 Valve
September 2018
9
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