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Instruction Manual
D104191X012
assembly (keys 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.
8. 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 by following the appropriate steps in the Trim
Maintenance procedure.
9. Remove the covering protecting the valve body cavity and install new bonnet gaskets (key 10 and 12, figures 6, 7,
8, 12, 13, and 14) making sure the gasket seating surfaces are clean and smooth. Then slide the bonnet over the
stem and onto the stud bolts (key 15, figures 6, 7, 8, 12, 13, and 14.)
WARNING
Personal injury or damage to equipment could occur if improper stud and nut materials or parts are used. Do not operate or
assemble this product with stud(s) and nut(s) that are not approved by Emerson/Fisher engineering and/or listed on the
serial card provided with this product. Use of unapproved materials and parts could lead to stresses exceeding the design
or code limits intended for this particular service. Install studs with the material grade and manufacturer's identification
mark visible. Contact your
approved parts is suspected.
10. Lubricate the bonnet studs (key 15, figure 6, 7, or 8) and all surfaces the studs and nuts come into contact with.
Make sure the nuts material matches the valve specification and set the nut surface with material specification
stamp facing up, therefore it is visible. Tighten the nuts (key 16, figures 6, 7, 8, 12, 13, and 14) in a uniform,
multistage cross pattern. Monitor the distance between the bonnet and body and keep it even to ensure that the
bonnet is being torqued evenly. Use no more than 1/4 of the specified torque as indicated in table 2
crisscross pattern, work up to the specified torque in 1/4 increments until the final torque is achieved. Wait a
minimum of 2 minutes to allow for gasket/screw relaxation and recheck the torque, retightening as necessary. After
final torquing, ensure there is an even gap and that the metal-to-metal contact between the valve body (or bonnet
spacer) and bonnet is achieved around the entire circumference of the body-bonnet joint.
Table 2. Body-to-Bonnet Torque Guidelines
VALVE SIZE,
NPS
2
3
4
11. Install new packing and the metal packing box parts according to the appropriate arrangement in figure 2. For
Enviro-Seal Graphite ULF packing only, see figure 5, parts list in this instruction manual and ENVIRO-SEAL Packing
System for Sliding-Stem Valves Instruction Manual (D101642X012) for packing arrangement and installation,
complete step 11, then move to step 14. Place a smooth-edged pipe over the valve stem and gently tap each soft
packing part into the packing box.
For all other packing, except Enviro-Seal packing, move to step 12.
12. Slide the packing follower, upper wiper (not applicable for graphite leak-off packing), and packing flange (keys
3,13, 12, figure 3 or 4) into position. Lubricate the packing flange studs (key 4, figure 3 or 4) and the faces of the
packing flange nuts (key 5, figure 3 or 4). Install the packing flange nuts.
13. For graphite leak-off packing, tighten the packing flange nuts to the maximum recommended torque shown in
table 3. Then, loosen the packing flange nuts, and retighten them to the recommended minimum torque shown in
table 3.
For other packing types, tighten the packing flange of the nuts alternatively in small increments until one of the
nuts reaches the minimum recommended torque shown in table 3. Then, tighten the remaining flange nut until the
packing flange is level and at a 90-degree angle to the valve stem.
Emerson sales office
representative immediately if a discrepancy between actual parts and
SA193-B7 Studs
NSm
91
122
163
BOLT TORQUES
Lbf‐in
67
90
120
.
Repeat the
S20910 (Nitronic 50) Studs
NSm
Lbf‐in
60
85
118
CCV-N Valve
October 2018
44
63
87
7
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