Flowserve Swing Check Valves 2.5-24 - Manual (Page 28)

Swing Check Valves FCD ADENIM0013-00
27
6.0 ASSEMBLY
(Continued)
MAXIMUM TORQUES FOR FIELD SERVICE (Ft. Lb.)
The following torque values are provided for guidance in filed work. These maximum torque values
provide for a range of friction coefficients without damage to the designated bolting material.
Stud Size
A193
B7 & B16
A193
B8 &B8M
A453
660
A564
630
A574
5/16 -18 11 6.5 12 13 15
3/8 – 16 20 12 20 23 26
7/16 – 14 30 19 30 36 44
½ - 13 45 28 50 55 67
9/16 – 12 70 40 70 80 -
5/8 – 11 90 56 100 110 130
¾ - 10 165 100 165 195 230
7/8 – 9 270 160 280 310 375
1 – 8 400 240 420 470 560
1 1/8 - 8 600 350 600 690 800
1 ¼ - 8 800 500 850 970 1140
1 3/8 – 8 1100 675 1200 1320 1500
1 ½ - 8 1500 900 1600 1750 1970
1 5/8 – 8 1900 1150 2000 2250 -
1 ¾ - 8 2400 1450 2500 2850 3100
1 7/8 – 8 3000 1800 3200 3500 -
2 – 8 3700 2200 3900 4300 4600
2 1/8 – 8 4400 2650 4700 5200 -
2 ¼ - 8 5300 3200 5600 6200 6900
2 ½ - 8 7400 4400 8000 8600 9400
2 ¾ - 8 8700 5900 10400 11600 12800
3 – 8 11400 7800 13000 15200 16900
*Nominal torque values are 20% less than these values.
6.2
Pressure Seal Bonnet Valves
6.2.1 Disc – Hinge Assembly
The disc assembly procedure in a pressure seal valve is identical to the one for flanged bonnet valves
included in section 6.1.1. Refer to it for instructions.
TABLE 2