GE Masoneilan 48000 Series Instruction Manual page 12

Assembly Torque requirements
Valve size
Seat ring retainer thread
Torque daN-m
Body
Valve size (in)
2
3
4
6
Notes: 1. Do not exceed Maximum Torque values listed.
2. Tighten in increments until required torque levels are reached.
3. Reject assembly if metal-to-metal contact is not achieved after reaching Maximum Torque.
8 | GE Oil & Gas
2"
3.00"-16UN
150
ft-lbs 1110
Figure 8 – Seat ring Tightening Torques
Body stud Nuts
Thread size
1.5"-8 UN
1.625"-8 UN
1.875"-8 UN
1.75"-8 UN
1
6
4
2
Figure 9 - Bolting Torques and Tightening Sequence
3"
3.625"-16UN 5.0"-16UN
250
1840
number daN-m
6 212
8 261
8 372
12 315
1
8 5
3
4 3
5
6
7
2
© 2015 General Electric Company. All rights reserved.
4" 6"
6.5"-16UN
560 1270
4130 9360
Torque
ft-lbs
1560
1920
2740
2320