Viking Johnson MaxiFit Serie Notice De Montage page 2

MaxiDaptors
MaxiDaptor products are supplied ready assembled and should not
be dismantled. Size range: DN50 to DN700.
1. Viking Johnson MaxiDaptor FA's come in three configurations (Fig. 1) with the selection
being a function of the outside diameter and nominal flange drilling.
2. Examine the pipe ends and ensure they are round, smooth, free from bulges, dents and
score marks and within the outside diameter range given on the MaxiDaptor label. Weld
beads must be ground flush, maintaining correct surface profile. Ensure that pipe ends are
free from scale, rust, or any loose debris or other surface defects that may affect coupling
performance. (Fig. 2)
3. Check grade of gasket is suitable for conveyed medium.
4.
If the MaxiDaptor has 'T' bolts connecting the main flange body and end ring, ensure that
their heads are correctly located in the recesses in the back flange (Fig. 5).
5. Place the MaxiDaptor onto pipe end (Fig. 3). Adjust the setting gap between pipe end and
MaxiDaptor as necessary (Fig. 4). See setting gap table, but if in doubt contact Viking
Johnson Technical Support. Ensure that the pipe end is concentric with the bore of the
mating flange. (Fig. 4)
6. Prior to insertion of flange connecting bolts rotate the Maxidaptor body so that the nuts are
easily accessible during installation now Fit flange gasket (Viking Johnson recommend the
use of an IBC gasket) and ensure it is concentric with the flange connecting bolts (Fig.5).
Bolt the MaxiDaptor to the mating flange (See Fig. 6) using standard bolting procedures.
7. For Maxidaptors with three T' bolts/studs tighten in a triangular pattern (Fig. 7), where
MaxiDaptors have more or less than three bolts tighten 'T' bolts/studs in a diametrically
opposed sequence (Fig. 8), in all cases give the nuts one or two turns at a time to draw
up the end ring evenly. Using a Torque Wrench, all the nuts must be thoroughly tightened
to achieve the bolt torque figures given below, working around the flange adaptor as many
times as necessary. On completion, radial gap between pipe and flange adaptor end ring
should be even all the way round. Rubber may be seen to extrude into the gap.
Bolt Torque Table
Bolt
Ibf.ft
M12 40 - 50
M16 70 - 90
Notes:
A. Standard Viking Johnson MaxiDaptors DO NOT PREVENT PIPE PULL OUT. The user must ensure adequate external
restraint to the pipework is provided. This is essential.
B. When installing Viking Johnson MaxiDaptors on GRP pipe and certain AC pipes a reduced bolt torque is required -
contact the Viking Johnson technical support for further advice.
2
Torque
Nm
55 - 65
Sizes u.t.i 150mm Nom.
95 - 120
Sizes 175 to 300mm Nom.
Sizes over 300mm Nom.
Sizes u.t.i 600mm Nom.
Setting Gap Table
All Nominal Sizes
Straight Sleeve MaxiDaptor
Expanded Sleeve MaxiDaptor
Recommended Setting Gap
20mm
25mm
45mm
130mm