91
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USER MANUAL
9.4
Mechanical assembly
9.4.1
Valve torque specifications
Valve cylinder head torque specifications (stud-nuts)
Table 9-1:
Valve size (in)
Daniel Class
Num. bolts
Min. torque (lbs/ft)
2
150
6
6
300
6
15
600
6
67
3
150
6
15
300
6
40
600
8
49
4
150
8
13
300
8
35
600
8
100
6
150
8
18
300
8
46
600
10
211
8
150
10
51
300
10
132
600
12
274
10
150
12
67
300
12
199
400
16
216
600
16
369
12
150
12
117
300
12
302
600
16
565
16
150
20
142
300
20
368
600
20
922
Torque specification for socket-head screws
Table 9-2:
Nominal pipe size
Daniel Class
Max Torque (ft-lb)
6"
600
5
8"
600
11
Planned maintenance
User manual
91