172-65742MA-01 (CT20/CT20D) 7 Oct 2021
11
Disassembly/Reassembly
When disassembling or removing the product, wait until the internal
pressure equals atmospheric pressure and the surface of the product
has cooled to room temperature. Disassembling or removing the
product when it is hot or under pressure may lead to discharge of fluids,
causing burns, other injuries or damage.
CAUTION
Be sure to use only the recommended components when repairing the
product, and NEVER attempt to modify the product in any way. Failure to
observe these precautions may result in damage to the product or burns
or other injury due to malfunction or the discharge of fluids.
CAUTION
Use the following procedures to remove components. Use the same procedures in
reverse to reassemble. (Installation, inspection, maintenance, repairs, disassembly,
adjustment and valve opening/closing should be carried out only by trained
maintenance personnel.)
For details of the actuator and the electro-pneumatic digital positioner, refer to the
respective instruction manuals issued by the manufacturer.
NOTE: Be sure to coat all threaded portions of the valve seat and bolts with anti-seize.
Removing/Reattaching the Actuator (Positioner)
Part
During Disassembly
During Reassembly
Stem Bracket Bolt
Loosen the stem bracket bolt and
remove the stem bracket clamps
connecting the actuator stem and
stem connector nut
Consult the table of tightening
torques and tighten to the proper
torque
―
When an input signal is sent to
the positioner, the actuator stem
will ascend
―
Fixing Nut
Remove the fixing nut connecting
the actuator and the valve bonnet
while keeping the actuator stem in
the raised position
Consult the table of tightening
torques and tighten to the proper
torque
Fixing Nut
Stem Bracket Clamps
Valve Bonnet
