Instruction Manual
D104297X012
V270 Valve
September 2018
7
Under normal conditions, the packing nuts should not require re‐tightening. However, when servicing, if the springs
do not remain at the target load of 85% compression, retighten the packing box nuts per the following:
1. Tighten the packing flange nuts alternately and evenly, keeping the packing flange parallel with the valve flange
(see figure 3), until the Belleville springs are compressed 100% (or completely flat).
a. For PTFE packing, loosen each packing flange nut one half turn (180
_
of rotation)
.
2. The target load of 85% compression has now been reached. If leakage continues, replace the packing components
and inspect the packing box housing bore and valve drive shaft for damage as described in the following
procedures.
Replacing Packing
Replacing the packing requires bleeding off the system and removing the actuator from the valve. Valve/actuator
adjustments cannot be made correctly without observing the fully open or closed position of the ball (key 3). It is not
necessary to remove the valve from the pipeline to make adjustments, if care is taken to note the position and
alignment of the shaft and coupler.
Refer to figure 3 which identifies the V270 packing components by key number.
Figure 3. Packing Arrangement Details
LIVE-LOADED
PACKING ARRANGEMENT
DRIVE SHAFT
(KEY 4)
PACKING FLANGE
(KEY 37)
SPRING PACK AND
FOLLOWER ASSEMBLY
(KEY 38)
ANTI-EXTRUSION
RING (KEY 32)
PACKING BOX
RING (KEY 34)
PACKING STUD
AND NUT
(KEYS 35 AND 36)
PTFE V-RING
PACKING SET
(KEY33)
B2472-1
E1659
Packing Disassembly
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 (or other power
source) 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 disassembling the
equipment.
