Flowserve Nordstrom Dynamic Balance Plug Valve and Double DB Plug Valve - Manual (Page 30)

Flow Control
Nordstrom Valves
30 Dynamic Balance ® Plug Valve and Double DB ® Double Isolation Plug Valve FCD NVENIM2005-01
9 Tables
Torque Values for Pressure Retaining Bolting
Table 1– Size 4 and Smaller Valve Gland Bolting
Bolt Size 1st
Torque (ft-lb)
2nd 3rd
3 ⁄
8
- 16 UNC Hand Snug 15 25
1/2 - 13 UNC Hand Snug 40 55
5 ⁄
8
- 11 UNC Hand Snug 80 110
Table 2 – Size 4 and Smaller Valve Cover Bolting
Bolt Size
Torque (ft-lb)
1st 2nd 3rd
3 ⁄
8
– 11 UNC 20 85 110
3/4 – 10 UNC 20 135 180
7 ⁄
8
– 9 UNC 30 220 290
1 – 8 UNC 45 340 450
1 1 ⁄
8
– 8 UNC 70 530 705
11/4 – 8 UNC 90 675 900
Table 3 – Size 6 and Larger Valve Pressure Retaining Bolting
(all parts)
Thread Size
Torque (ft-lb)
Minimum Maximum
1/4 – 20 5 6
5 ⁄
16
- 18 10 12
3 ⁄
8
– 16 15 18
7 ⁄
16
– 14 25 30
1/2 – 13 38 45
9 ⁄
16
– 12 58 68
5 ⁄
8
– 11 76 90
3/4 – 10 127 150
7 ⁄
8
– 9 205 240
1 – 8 315 370
1 1 ⁄
8
– 8 500 585
11/4 – 8 640 750
1 3 ⁄
8
– 8 870 1020
11/2 – 8 1010 1200
1 5 ⁄
8
– 8 1400 1650
13/4 – 8 1900 2250
1 7 ⁄
8
– 8 2550 3000
2 – 8 2800 3300
21/4 – 8 4000 4900
21/2 – 8 5500 5800
23/4 – 8 7400 9100