OMB Valves S.p.A
. Forged steel GATE, GLOBE & CHECK Valves Installation, Operation and Maintenance Manual Rev.5- 2016
Via Europa,7 Cenate Sotto 24069 (BG) Italy
Tel: +39 035 4256711
Fax: +39 035 942638
www.ombvalves.com
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1. TORQUE VALUES FOR BONNET BOLTING (STANDARD-ISO)
Torque Values (Lbs-inch)
Ideal
Max
Ideal
Max
Ideal
Max
Ideal
Max
Ideal
Max
Ideal
Max
B7
159.3
177
309.7
354
548.7
619.5
876.2
991.2
1336.4
1513.4
2610.9
2965
B7M
123.9
141.6
238.9
274.3
415.9
477.9
672.6
761.1
1017.8
1150.6
1991.4
1991.4
B8 CL.1
44.2
53.1
88.5
97.3
159.3
177
247.8
283.2
380.5
433.6
743.4
840.8
B8M
44.2
53.1
88.5
97.3
159.3
177
247.8
283.2
380.5
433.6
743.4
840.8
L7
159.3
177
309.7
354
548.7
619.5
876.2
991.2
1336.4
1513.4
2610.9
2965
L7M
123.9
141.6
238.9
274.3
415.9
477.9
672.6
761.1
1017.8
1150.6
1991.4
1991.4
B16
159.3
177
309.7
354
548.7
619.5
876.2
991.2
1336.4
1513.4
2610.9
2965
Torque Values (Nmt)
Ideal
Max
Ideal
Max
Ideal
Max
Ideal
Max
Ideal
Max
Ideal
Max
B7
18
20
35
40
62
70
99
112
151
171
295
335
B7M
14
16
27
31
47
54
76
86
115
130
225
255
B8 CL.1
5
6
10
11
18
20
28
32
43
49
84
95
B8M
5
6
10
11
18
20
28
32
43
49
84
95
L7
18
20
35
40
62
70
99
112
151
171
295
335
L7M
14
16
27
31
47
54
76
86
115
130
225
255
B16
18
20
35
40
62
70
99
112
151
171
295
335
Torque Values (Lbs-ft)
Ideal
Max
Ideal
Max
Ideal
Max
Ideal
Max
Ideal
Max
Ideal
Max
B7
13.27
14.75
25.81
29.50
45.72
51.62
73.01
82.60
111.37
126.12
217.58
247.08
B7M
10.32
11.80
19.91
22.36
34.66
39.82
56.05
63.43
84.81
95.88
165.95
165.95
B8 CL.1
3.68
4.42
7.37
8.11
13.27
14.75
20.65
23.60
31.71
36.14
61.95
70.06
B8M
3.68
4.42
7.37
8.11
13.27
14.75
20.65
23.60
31.71
36.14
61.95
70.06
L7
13.27
14.75
25.81
29.50
45.72
51.62
73.01
82.60
111.37
126.12
217.58
247.08
L7M
10.32
11.80
19.91
22.36
34.66
39.82
56.05
63.43
84.81
95.88
165.95
165.95
B16
13.27
14.75
25.81
29.50
45.72
51.62
73.01
82.60
111.37
126.12
217.58
247.08