172-65727MA-01 (CV-COS-16) 7 Oct 2021
12
Part
During Disassembly
During Reassembly
Flange/
Valve Bonnet
Pull up and off, being careful not to
damage the valve plug & stem or
valve seat
Reattach, being careful not to
damage the valve plug & stem or
valve seat
Insert the valve bonnet into the
gasket housing securely and without
tilting
Valve Bonnet
Gasket
Remove the gasket and clean
sealing surfaces
Replace with a new gasket; do not
coat with anti-seize
Valve Bonnet
Guide
Pull up and off, taking care not to
damage the valve plug & stem or
valve seat
The difference between the inner
diameter of the body and the outer
diameter of the valve bonnet guide is
very small, so make sure that it does
not tilt and get caught when pulling
the valve bonnet guide up and off
Reattach, being careful not to
damage the valve plug & stem or
valve seat
The difference between the inner
diameter of the body and the outer
diameter of the valve bonnet guide
is very small, so make sure that it
does not tilt and get caught when
inserting the valve bonnet guide
Valve Bonnet
Guide Gasket
Remove the gasket and clean
sealing surfaces
Replace with a new gasket if warped
or damaged
Valve Plug &
Stem
Pull up and out, being careful not to
damage the plug & stem
Reattach, being careful not to
damage the plug & stem
Valve Seat
15 to 25 mm (
1
/
2
to 1 in): Remove
with a socket wrench
40 to 50 mm (
1
1
/
2
to 2 in): Remove
with a thin wall socket fitted to a
socket wrench or a power wrench;
when using a power wrench, refer to
its instruction manual
Overtightening the valve seat may
lead to damage the valve seat
and/or body; consult the table of
tightening torques and tighten to the
proper torque
Valve Seat
Gasket
Remove the gasket and clean
sealing surfaces
Replace with a new gasket if warped
or damaged
Valve Seat
Valve Plug & Stem
Valve Bonnet
Gasket
Flange
Nut
Valve
Bonnet
Guide
Bushing