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Top Entry Trunnion Mounted Cryogenic Ball Valves – C52
Valves Series
Top Entry Trunnion Mounted Cryogenic Ball Valves – C52
Valves
Series
17
3.22.
Lubricate threads of bolts and nuts with an anti-galling compound to prevent galling.
3.23.
Initial tightening of the body bolts should be done according to the tightening sequence illustrated:
Tightening pattern:
3.24.
Tighten the body bolts according to table 3:
Table 3:
3.25.
Close and open the valve several times to ensure its proper operation.
Bolt material
Thread
Valve size
Required torque
N-m
Lb-In
Stainless Steel:
Grade A2-70
M8
1/2” (DN15)
20
180
M10
3/4”-1" (DN20-DN25)
40
350
M12
1 1/2” (DN40)
65
575
M16
2-2 1/2” (DN50-DN65)
180
1590
M20
3" (DN80)
350
3100
M24
4" (DN100)
600
5310
M30
6” (DN150)
1000
8850