Hub and seal ring seating surfaces must be clean and free from foreign matter. Damage to hub seats and seal lips is not acceptable, and should be rectified before assembly.
LUBRICATE
Usually seal rings are coated which acts as lubricant during make-up. If required light oil or MoS2 spray can be used. Take care that no solid particles are present in the lubricant.
CHECK SEALRING STANDOFF
The sealring should rock slightly against hub face. Stand-off dimensions given below in inches.
SealRing
Nominal Standoff "Canted"
Min "Canted"
for Re-use
4
0.018
0.006
5
0.018
0.006
7
0.021
0.007
11
0.025
0.009
12
0.025
0.009
13
0.025
0.009
14
0.024
0.008
16
0.024
0.009
20
0.023
0.011
23
0.025
0.013
25
0.028
0.014
27
0.032
0.016
31
0.031
0.015
34
0.036
0.018
40
0.039
0.019
42
0.042
0.021
46
0.050
0.025
52
0.050
0.025
SealRing
Nominal Standoff "Canted"
Min "Canted"
for Re-use
56
0.053
0.026
62
0.092
0.046
64
0.096
0.048
67
0.096
0.048
72
0.099
0.050
76
0.103
0.052
82
0.107
0.053
84
0.111
0.055
87
0.114
0.057
91
0.118
0.059
92
0.118
0.059
94
0.122
0.061
97
0.129
0.065
102
0.129
0.065
106
0.137
0.068
112
0.144
0.072
116
0.148
0.074
120
0.155
0.078
SealRing
Nominal Standoff "Canted"
Min "Canted"
for Re-use
122
0.155
0.078
124
0.152
0.076
130
0.167
0.083
134
0.167
0.083
137
0.163
0.081
140
0.167
0.083
144
0.193
0.096
152
0.189
0.095
160
0.193
0.096
170
0.200
0.100
180
0.207
0.104
185
0.219
0.109
192
0.230
0.115
200
0.234
0.117
210
0.224
0.112
220
0.254
0.127
225
0.261
0.130
232
0.272
0.136
All data contained herein may be subject to change without notice.
ASSEMBLE COMPONENTS
Install sealring into the hubs, and assemble clamps around the hubs. Lubricant applied to the hub/clamp contact area will aid assembly. The studbolts should be fitted ensuring that spherically faced nuts locate into spherical seats of the clamps. Lubrication of nut faces and bolt threads is recommended..
TIGHTEN BOLTS IN UNIFORM MANNER
Bolting should be tightened to keep spacing between clamp halves approximately equal. Clamp segments should be shocked with suitable soft faced hammer to aid assembly. Always re-tighten bolts after shocking to the torque/preload values given below.
ALIGN HUBS
Hubs should be aligned so that seal ring can be installed between hubs. DO NOT attempt
to correct badly mis-aligned piping by clamping force alone; piping pulling forces should only be
released when clamp is fully assembled.
Clamp Size
Lubricated
Unlubricated
FT-IBS
Nm
FT-IBS
Nm
Standard Clamp series
1"
17
23
26
35
1 1/2"
35
47
53
71
2"
55
75
83
112
3"
60
81
90
122
4"
90
122
135
183
5"
140
190
210
285
6"
200
271
300
407
8"
300
401
450
610
Clamp Size
Lubricated
Unlubricated
FT-IBS
Nm
FT-IBS
Nm
Light Duty Clamp series
L14"
650
881
975
1322
L16"
900
1220
1350
1830
L18"
1200
1627
1800
2440
L20"
1300
1762
1950
2644
L24"
1850
2506
2775
3762
Clamp Size
Lubricated
Unlubricated
FT-IBS
Nm
FT-IBS
Nm
Heavy Duty Clamp series
H2"
90
122
135
183
H3"
100
136
150
203
H4"
140
190
210
285
H8"
390
529
585
793
H10"
600
813
900
1220
H12"
900
1220
1350
1830
H14"
1200
1627
1800
2440
H16"
2000
2711
3000
4067
H18"
2000
2711
3000
4067
H20"
2000
2711
3000
4067
H22"
2000
2711
3000
4067
H24"
2000
2711
3000
4067
H26"
2000
3389
3750
5084
These values are the minimum recommended. For normal piping fabrication increase values by 1.5.
For severe piping mis-alignment increase values by 2.0 except for thin walled hubs - contact Vector International for assistance.
All data contained herein may be subject to change without notice.
