Flowserve Nordstrom Dynamic Balance Plug Valve and Double DB Manual do Utilizador descarregar pdf (Página 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

⁄8 - 16 UNC Hand Snug 15 25

½ - 13 UNC Hand Snug 40 55

⁄8 - 11 UNC Hand Snug 80 110

Table 2 – Size 4 and Smaller Valve Cover Bolting

Bolt Size

Torque (ft-lb)

1st 2nd 3rd

⁄8 – 11 UNC 20 85 110

¾ – 10 UNC 20 135 180

⁄8 – 9 UNC 30 220 290

1 – 8 UNC 45 340 450

⁄8 – 8 UNC 70 530 705

1¼ – 8 UNC 90 675 900

Table 3 – Size 6 and Larger Valve Pressure Retaining Bolting

(all parts)

Thread Size

Torque (ft-lb)

Minimum Maximum

¼ – 20 5 6

⁄16 - 18 10 12

⁄8 – 16 15 18

⁄16 – 14 25 30

½ – 13 38 45

⁄16 – 12 58 68

⁄8 – 11 76 90

¾ – 10 127 150

⁄8 – 9 205 240

1 – 8 315 370

⁄8 – 8 500 585

1¼ – 8 640 750

⁄8 – 8 870 1020

1½ – 8 1010 1200

⁄8 – 8 1400 1650

1¾ – 8 1900 2250

⁄8 – 8 2550 3000

2 – 8 2800 3300

2¼ – 8 4000 4900

2½ – 8 5500 5800

2¾ – 8 7400 9100

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