SERIES 740 BIDIRECTIONAL KNIFE GATE VALVE
Installation, Operation, and Maintenance Manual
15 of 28© 2021 BRAY INTERNATIONAL, INC. ALL RIGHTS RESERVED. BRAY.COM The Information
contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would
violate its proprietary nature without the express written permission of Bray International, Inc.
9.8 Tighten flange bolts in a star pattern. See Figure 14.
9.9 Refer to GA Drawing/ Technical Bulletin for quantity and size of
blind tapped holes on valve chest area.
9.10 Gland packing is tightened to hold the specified pressure and
tested for no leakage before dispatch. However, this may
require some adjustment at site due to loosening in transit etc.
Figure 12: L7 Lug Stud
Figure 13: L8 Chest Stud
Figure 10: L5 Lug Bolt
Figure 11: L6 Chest Bolt
Table 1: RECOMMENDED FASTENERS - ASME B16.5 Class 150 Flanges
L5 (Figure 10) L6 (Figure 11)
Valve Size Bolt & Nut
Size Lug Bolt
Length Lug Bolt
Qty Chest Bolt
Length Chest Bolt
Qty Washer*
Quantity
NPS DN NPS
2 50 5/8-11 1.5 4 1.25 4 8
3 80 5/8-11 1.8 4 1.5 4 8
4 100 5/8-11 1.8 12 1.5 4 16
5 125 3/4-10 2.0 12 1.5 4 16
6 150 3/4-10 2.0 12 1.5 4 16
8 200 3/4-10 2.3 12 1.75 4 16
10 250 7/8-9 2.5 16 1.75 824
12 300 7/8-9 2.5 16 1.75 824
14 350 1-8 2.8 16 2.0 824
16 400 1-8 2.8 20 2.25 12 32
18 450 1 1/8-7 3.0 20 2.25 12 32
20 500 1 1/8-7 3.3 24 2.5 16 40
24 600 1 1/4-7 3.5 24 2.75 16 40
* Washer Type B Wide
Table 2: RECOMMENDED FASTENERS - ASME B16.5 Class 150 Flanges
L7 (Figure 12) L8 (Figure 13)
Valve Size Bolt & Nut
Size Lug Bolt
Length Lug Bolt
Qty Chest Bolt
Length Chest Bolt
Qty Nut
Qty Washer*
Qty
NPS DN NPS NPS
2 50 5/8-11 3.5 4 2.0 4 8 8
3 80 5/8-11 4.0 4 2.25 4 8 8
4 100 5/8-11 4.0 12 2.25 4 16 16
5 125 3/4-10 4.25 12 2.5 4 16 16
6 150 3/4-10 4.50 12 2.5 4 16 16
8 200 3/4-10 4.75 12 2.75 4 16 16
10 250 7/8-9 5.25 16 3.0 824 24
12 300 7/8-9 5.25 16 3.0 824 24
14 350 1-8 6.0 16 3.5 8 24 24
16 400 1-8 6.0 20 3.5 12 32 32
18 450 1 1/8-7 6.5 20 4.0 12 32 32
20 500 1 1/8-7 7.0 24 4.0 16 40 40
24 600 1 1/4-7 7.5 24 4.5 16 40 40
* Washer Type B Wide