Purification Systems
Page 93
3rd Edition, Rev 0 Chg 6
6.4
Reference Data
6.4.1
Tightening Torque Values
1. Unless otherwise specified in text, the torque values in Table 1 apply.
2. The indicated torque values are valid for bolts in greased condition.
3. Self locking nuts must be replaced on reassembly
4. Pipe connections (swivel nuts) should be tightened just enough so that leakage is stopped. Not more
than finger tight plus up to an additional 1/2 turn.
6.4.2
Torque Sequence Diagrams
6.4.3
Conversion Formulas
°F = 9/5°C + 32
°C = 5/9 x (°F-32)
PSI = BAR x 14.5
BAR =PSI x 0.0689
Bolt or Screw
Size
Max. Torque
Hex and socket head
1/4” (M 6)
7 ft. lbs. (10 Nm)
Hex and socket head
5/16” (M 8)
18 ft. lbs. (25 Nm)
Hex and socket head
3/8” (M 10)
32 ft. lbs. (45 Nm)
Hex and socket head
1/2” (M 12)
53 ft. lbs. (75 Nm)
Hex and socket head
9/16” (M 14)
85 ft. lbs. (120 Nm)
Hex and socket head
5/8” (M 16)
141 ft.-lbs (200 Nm)
Table 6-1:
Torque Values
Figure 6-2
6 Bolt and 4 Bolt Torque Sequence
1
2
3
4
4 Bolt Torquing
Sequence
1
2
3
4
5
6
6 Bolt Torquing
Sequence
