Instruction Manual
D100714X012
461 Valve
June 2017
11
Replacing Trim
Refer to figure 6.
Disassembly
1. Remove the actuator and the bonnet according to steps 1 through 6 of the Replacing Packing section.
2. Remove the valve plug and stem assembly (keys 3 and 10) from the valve. If the stem needs to be replaced, drive
the pin (key 11) out, and unthread the stem from the plug.
CAUTION
Never use an old stem with a new valve plug. The use of an old stem requires drilling a new pin hole through the stem,
which will weaken the stem.
3. If the valve plug needs replacing, replace the entire valve plug and stem assembly. Do not reuse the old stem on a
new valve plug. If only a new stem is necessary, screw the plug onto the new stem. Drill a 4.8 mm (3/16 inch) hole
through the stem using the plug pin hole as a guide. Drive the pin into the stem and plug.
Table 3. Recommended Torque for PTFE Type Packing Flange Nuts (non live-loaded)
VALVE STEM DIAMETER
PRESSURE RATING
TORQUE
NSm lbfSft
mm Inches Min Max Min Max
19.1 3/4
CL600 10 15 7 11
CL900 27 41 20 30
CL1500 34 50 25 37
CL2500 41 61 30 45
25.4 1
CL600 17 25 13 18
CL900 42 62 31 46
CL1500 52 77 38 57
CL2500 61 91 45 67
31.8 1-1/4
CL600 24 36 18 27
CL900 56 83 41 61
CL1500 68 102 50 75
CL2500 81 122 60 90
4. With the stem and valve plug assembly removed, slide the liner (key 5) out of the valve body. Inspect the seat ring
(key 2) for nicks and scratches. Make sure the valve plug and seat ring contact surfaces are free of nicks and
scratches.
5. To remove the liner (key 5), break it loose by using cap screws in the tapped holes located in the liner's flange. (In
some very hard materials, i.e., R30006, the holes have been omitted; therefore, a sleeve puller or similar device
must be used).
6. To replace the seat ring (key 2), remove the valve from the line, or remove the pipe connected to the flange. Then,
unthread the seat ring retainer (key 4), and remove the seat ring through the bottom of the valve body.
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