Table of Contents
Advertisement
Instruction Manual
D102030X012
13. For spring-loaded PTFE V-ring packing, tighten the packing flange nuts until the shoulder on the packing follower
contacts the bonnet.
For graphite packing, tighten the packing flange nuts to the maximum recommended torque shown in table 1.
Then loosen the packing flange nuts, and retighten them to the recommended minimum torque shown in table 1. If
the stem diameter of your valve is not shown in the table, contact your Emerson Process Management sales office.
For ENVIRO-SEAL or HIGH-SEAL live-loaded packing, refer to the note at the beginning of the Maintenance section.
For other types of packing, contact your Emerson Process Management sales office.
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.
Table 1. Packing Flange Nut Torque for Graphite Packing
STEM DIAMETER
mm
Inches
19.1
25.4
31.8
1-1/4
50.8
Trim Maintenance
WARNING
Refer to the warning at the beginning of the maintenance section.
CAUTION
Use care to avoid damaging gasket sealing surfaces.
The surface finish of the valve stem is critical for making a good packing seal. The seating surfaces of the valve plug and the
seat ring on a metal-seat construction are critical for tight shutoff. Assume all these parts are in good condition and protect
them accordingly, unless inspection reveals otherwise.
1. Isolate the valve body and actuator from all pressure. Release all pressure from the valve. Disconnect any operating
lines providing air pressure, electric power, or a control signal to the actuator. Be sure the actuator cannot suddenly
open or close the valve.Use bypass valves or completely shut off the process to isolate the valve from process
pressure. Relieve process pressure from both sides of the valve. Drain the process media from both sides of the
valve.Vent the pneumatic actuator loading pressure and relieve any actuator spring precompression.Use lock-out
procedures to be sure that the above measures stay in effect while you work on the equipment.
2. Disconnect the operating lines from the actuator and any leak-off piping from the valve.
3. Being careful to avoid damage to the valve plug (key 4), remove the valve from the line. Disconnect the stem
connector, and then remove the actuator from the valve by unscrewing the yoke locknut (key 16) or the cap screws
(key 17).
PRESSURE RATING
CL150
CL300
3/4
CL600
CL900
CL150
CL300
1
CL600
CL900
CL150
CL300
CL600
CL900
CL600
2
CL900
MINIMUM TORQUE
NSm
LbfSIn
11.2
99
15.0
133
20.6
182
25.0
221
19.1
169
25.5
226
35.1
310
42.5
376
26.9
238
35.9
318
49.4
437
59.8
530
63.8
565
77.3
684
SS-83 Valve
March 2013
MAXIMUM TORQUE
NSm
LbfSIn
16.9
149
22.5
199
30.9
274
37.5
332
28.7
254
38.3
339
52.6
466
63.8
564
40.4
357
53.8
477
74.0
655
89.7
794
95.7
847
116
1,026
9
Advertisement
Table of Contents
