22
M8
1.25
15
6
18
20
16
9
3
11
12
10
M10
1.50
30
11
36
40
32
18
7
21
24
19
M12
1.75
52
19
62
69
55
31
12
37
40
33
M14
2.00
83
31
99
108
88
49
18
58
64
52
M16
2.00
126
47
150
165
134
74
28
88
97
79
M18
2.50
174
65
207
228
185
103
38
123
135
110
M20
2.50
243
91
289
318
258
143
53
143
187
152
M22
2.50
327
122
327
428
348
191
71
191
250
203
M24
3.00
415
155
415
544
441
245
91
200
320
261
M27
3.00
601
224
492
787
639
351
131
287
459
373
M30
3.50
814
303
511
1066
866
477
178
299
625
507
M33
3.50
1097
409
688
1436
1167
639
238
401
836
680
M36
4.00
1410
526
884
1845
1500
824
307
517
1078
876
M39
4.00
1810
675
1135
2370
1925
1052
392
660
1377
1119
M42
4.50
2241
835
1406
2934
2384
1306
487
819
1710
1389
M45
4.50
2780
1036
1744
3639
2957
1613
601
1012
2112
1716
M48
5.00
3348
1248
2100
4383
3561
1948
726
1222
2571
2072
M52
5.00
4298
1602
2696
5626
4572
2488
927
1561
3257
2646
M56
5.50
5343
1991
3352
6995
5683
3098
1155
1943
4056
3295
M60
5.50
6624
2469
4155
8671
7046
3824
1425
2399
5006
4067
KTM
VIRGO SERIES N TRUNNION MOUNTED BALL VALVES
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
14 RECOMMENDED TIGHTENING TORQUES
FOR FASTENERS AND PLUGS
NOTES
1. Ensure that all the nuts/bolts are tightened to the
torque values as specified in below Tables.
2. Torque values for carbon and low alloy steel
material are for dry and non-lubricated fasteners.
3. Torque values for austenitic stainless steel
material are with anti-seize lubricant.
4. Apply pipe thread sealant to the threads of the
drain and vent plugs.
5. 1 Nm = 0.737 ft·lb
FOR METRIC SERIES (Nm)
Thread size
(Metric)
Pitch
Non-coated bolts / nuts
Coated bolts / nuts
Low resistance bolt /
stud material
High resistance bolt /
stud material
Low resistance bolt /
stud material grade
High resistance bolt /
stud material
L7M, B7M
B8M
Class 1
B8M
Class 2
L7, B7
Gr 660
L7M, B7M
B8M
Class 1
B8M
Class 2
L7, B7
Gr 660