Bray Triple Offset - Manual (Page 19)

17 O & M
ASME CLASS
600 & 900
A D i v i s i o n o f B r a y I n t e r n a t i o n a l , I n c .
The Ultimate Critical Service Triple Offset Valve
O p e r a t i o n a n d M a i n t e n a n c e M a n u a l
Table 5
Torque Values for Seat Retaining
Valve Size
Class 600 Class 900
Seat Lower Dowel Fastener* Seat Lower Dowel Fastener*
in mm Lb-in Nm Lb-in Nm
4 100 65 - 90 7-10 - -
6 150 180 - 225 20-25 310 - 350 35-40
8 200 265 - 310 30-35 310 - 350 35-40
10 250 265 - 310 30-35 310 - 350 35-40
12 300 265 - 310 30-35 - -
14 350 530 - 575 60-65 - -
16 400 530 - 575 60-65 850 - 950 95-105
18 450 530 - 575 60-65 850 - 950 95-105
20 500 - - 1240 - 11420 140-160
*Seat upper dowels require 1/3 the torque of the seat lower dowel fasteners.
Table 6
Torque Values for Gland Retaining Cap Nuts
Valve Size Class 600 Class 900
in mm Lb-in Nm Lb-in Nm
4 100 130 - 155 15-17.5 - –
6 150 265 - 310 30-35 265 - 310 30-35
8 200 265 - 310 30-35 620 - 750 70-85
10 250 490 - 530 55-60 750 - 840 80-95
12 300 620 - 750 70-85 - -
14 350 620 - 750 70-85 - -
16 400 750 - 840 80-95 1685 - 1815 190-205
18 450 1110 - 1240 125-140 1685 - 1815 190-205
20 500 - - 1685 - 1815 190-205
Table 7
Torque Values for Bottom Flange Screws
Valve Size Class 600 Class 900
in mm Lb-in Nm Lb-in Nm
4 100 265 - 310 30-35 - -
6 150 350 - 400 40-45 1240 - 1285 140-145
8 200 350 - 400 40-45 1860 - 1995 215-225
10 250 1240 - 1285 140-145 1860 - 1995 215-225
12 300 1240 - 1285 140-145 - -
14 350 1860 - 1995 215-225 - -
16 400 1860 - 1995 215-225 2560 - 2650 290-300
18 450 2560 - 2650 290-300 2560 - 2650 290-300
20 500 - - 2560 - 2650 290-300