Instruction Manual
D100381X012
HS Valve
June 2019
8
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.
6. Clean the packing box and all metal packing box parts.
7. Install a new bonnet gasket on the valve. With the valve plug and stem in the valve, slide the bonnet over the stem
and onto the valve.
Note
The prelubricated stud bolt nuts referred to in step 8 can be identified by a black film coating on the nut threads. The accepted
bolting procedures in step 8 include—but are not limited to—ensuring that bolting threads are clean, and evenly tightening the cap
screws, or the nuts onto the studs, in a crisscross pattern. Repeat the crisscross tightening pattern several times until each cap
screw or nut is tight and the body-to-bonnet seal is made.
8. Lubricate the bonnet bolting with anti-seize lubricant (not necessary if factory prelubricated stud bolt nuts are
used) and install it, using accepted bolting procedures during tightening so that the body-to-bonnet joint will
withstand test pressures and application service conditions. The bolt torques in table 4 may be used as guidelines.
9. Using care to avoid damaging packing on the valve stem thread, install packing and associated parts in the
appropriate sequence. Replace the packing flange and packing flange nuts.
10. Tighten the packing flange nuts as follows:
a.
For spring-loaded PTFE V-ring packing
, tighten the packing flange nuts until the shoulder on the packing follower
contacts the bonnet.
b. F
or graphite packing
, tighten the packing flange nuts to the maximum recommended torque shown in table
5. Then, loosen the packing flange nuts, and retighten them to the recommended minimum torque shown in
table 5.
c.
For other packing types
, tighten the packing flange nuts alternately in small equal increments until one of the
nuts reaches the minimum recommended torque shown in table 5. Then, tighten the remaining flange nuts until
the packing flange is level and at a 90-degree angle to the valve stem.
d.
For ENVIRO-SEAL or HIGH-SEAL live-loaded packing
, refer to the note at the beginning of the Maintenance
section.
11. Mount the actuator and adjust the stem connector per the Mounting Actuator and Adjusting Travel section and the
appropriate actuator instruction manual.
Table 4. Body‐to‐Bonnet Bolt Torque Guidelines
(1)
VALVE SIZE,
NPS
BOLT TORQUES
(2)
Steel and Stainless Steel Valves with Studs and Nuts
SA‐193‐B7
SA‐193‐B16
SA‐193‐B8M
Strain Hardened
N
S
m
Lbf
S
ft
N
S
m
Lbf
S
ft
1
400
90
400
90
1‐1/2
534
120
534
120
2
845
190
845
190
3
1223
275
1223
275
4
1223
275
1223
275
6
2335
525
2335
525
8
4159
935
4159
935
10
4159
935
4159
935
1. Contact your
for torques required for other bolting materials.
2. For bolting field-lubricated using anti-seize lubricant, contact your Emerson sales office for torques required with other lubricants.
