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Design V260
Assembly
If the valve is equipped with the ENVIRO-SEAL pack-
ing system, refer to the ENVIRO-SEAL Packing Sys-
tem for V-Line and edisc Rotary Valves instruction
manual for assembly.
1. If the packing housing assembly (key16) is re-
moved from the valve, use the valve assembly steps to
reinstall the drive shaft (key 20) and packing housing
assembly on the valve.
2. For standard packing arrangements, install the new
packing parts using the parts sequence shown in fig-
ure 3.
3. Secure the packing follower and packing flange
with the packing nuts (keys 114, 102, and 101). Tight-
en the nuts far enough to stop leakage during operat-
ing conditions.
4. If necessary, install the bonding strap assembly
shown in figure 2.
5. Use the steps provided in the Actuator Mounting
section to install the actuator on the valve. For actua-
tor travel adjustments, refer to the appropriate actuator
instruction manual.
6. When the control valve is installed in the pipeline
and in operation, check around the packing follower for
leakage and retighten the packing nuts as necessary.
Seal Ring Maintenance
Disassembly
WARNING
For valves with dual-seals, fluid and/or a
hazardous material may be trapped un-
der pressure in the valve body cavity.
To avoid personal injury, relieve the
pressure, and drain any remaining fluid
or hazardous material from the valve
body cavity. If necessary, disassemble
the valve in a safe area for cleaning.
See the WARNING at the beginning of
the Maintenance section for more in-
formation before removing the valve
from the pipeline.
6
Disassemble the valve only to the extent necessary to
accomplish the needed inspection and repairs. For
some repairs (for example, the trim parts only) com-
plete disassembly of the valve is not necessary. Follow
the disassembly procedures to the point necessary to
accomplish the repair, then skip to the appropriate as-
sembly steps to complete the reassembly of the valve.
Always clean and protect sealing surfaces from dam-
age.
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 as-
sembly within the tailpiece should be returned to the
same tailpiece from which it was removed. The bear-
ing 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, re-
lease 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 actua-
tor, and disconnect the pressure lines from the actua-
tor. Use lock-out procedures to be sure that the above
measures stay in effect while you work on the equip-
ment.
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 re-
turned 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 sec-
tion 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 tail-
piece flange resting on the flat surface. Be sure the
valve is in a stable, upright position before releas-
ing 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.
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