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CCV-N Valve
October 2018
Table 3. Recommended Torque for Packing Flange Nuts
Packing
mm
PTFE Packing
12.7
Graphite Leak-off
12.7
Packing
14. Mount the actuator on the valve assembly and reconnect the actuator and valve stem according to the procedure
in the appropriate actuator instruction manual.
Trim Maintenance
Non-Bore Seal Trim Constructions
WARNING
Refer to the WARNING at the beginning of the Maintenance section in this instruction manual.
CAUTION
Follow instructions carefully to avoid damaging the product surfaces, which could result in damage to the product. Protect
all surfaces of the valve plug, valve seat ring, and seat ring retainer during maintenance to ensure control valve accuracy
and choking performance is not affected.
Disassembly
1. Remove the actuator and the bonnet according to steps 1 through 6 of the Replacing Packing procedure in the
Maintenance section.
WARNING
To avoid personal injury due to leaking fluid, avoid damaging gasket sealing surfaces. The surface finish of the valve stem
(key 7, figure 6, 7, 8, 12, and 13) is critical for making a good packing seal. The inside surface of the seat ring retainer (key 3,
figure 6, 7, 8, 12, and 13), is critical for smooth operation of the valve plug. The seating surfaces of the valve plug (key 2,
figure 6, 7, 8, 12, and 13) and seat ring (key 9, figure 6, 7, 8, 12, and 13) are critical for proper shutoff. Unless inspection
reveals otherwise, assume all these parts are in good condition and protect them accordingly.
2. Remove the packing flange nuts, packing flange, upper wiper (not applicable for graphite leak-off packing), and
packing follower (keys 3, 5, 12, and 13, figure 3 or 4). For Enviro-Seal packing, remove the packing flange nuts,
packing flange, and spring pack assembly (key 201, 212, and 217, figure 5.) Carefully push out all the remaining
packing parts from the valve side of the bonnet using a rounded rod or other tool that will not scratch the packing
box wall. Clean the packing box and the metal packing parts.
3. Inspect the valve stem threads and packing box surfaces for any sharp edges which might cut the packing.
Scratches or burrs could cause packing box leakage or damage to the new packing. If the surface condition cannot
be improved by light sanding, replace the damaged parts.
4. On a CCV-N design with bonnet spacer, remove the bonnet spacer (key 32, figure 6 and 12) and associated gaskets
(key 10 and 12, figure 6 and 12) on top of the spacer without rotating the seat ring retainer (key 3, figure 6 and 12).
8
STEM SIZE
Rating
inch
1/2
CL300
CL300
1/2
CL600
MINIMUM TORQUE
NSm
Lbf‐in
3
30
7
59
9
81
Instruction Manual
D104191X012
MAXIMUM TORQUE
NSm
Lbf‐in
5
42
10
88
14
122
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