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Idiomas disponibles
Idiomas disponibles
MaxiFit Couplings
MaxiFit couplings are supplied ready assembled and should not be dismantled.
Size range: DN40 to DN700.
1.
Examine the pipe ends and ensure they are round, smooth, free from bulges, dents and score
marks and within the specified tolerances for that material. 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. 1)
2.
Check grade of gasket is suitable for conveyed medium.
3.
Align 2nd pipe to be laid with 1st pipe, ensure it is in line and concentric with the 1st pipe.
4.
To aid installation, mark both pipe ends at a distance equal to or greater than half the
overall assembled width of the coupling. (Fig. 2)
5.
Adjust setting gap between pipe ends as necessary (see setting gap table).
If in doubt contact Viking Johnson Technical Support. (Fig. 2)
6.
Using marks made at step 4, slide the coupling to a central position over the pipe ends and
rotate the coupling so that nuts can be easily accessible throughout the tightening procedure,
commence bolt-up. (Fig. 3)
7.
Where the coupling has only three bolts tighten the nuts in a triangular pattern (Fig. 4), for
fittings with more or less than three bolts tighten diametrically opposed bolts (Fig. 5), in
all cases give the nuts one or two turns at a time to draw up the end rings evenly. Using a
Torque Wrench, all the bolts must be thoroughly tightened to the figures in the Bolt Torque
Table, working around the coupling as many times as necessary. On completion, the radial
gap between pipe and coupling should be even all the way round. Rubber may be seen to
extrude into the gap.
Bolt Torque Table
Bolt
M12
M16
Typical Pipe Diameter Range
Sizes less than DN150
Sizes DN150 to DN300
Sizes greater than DN300
Every effort has been made to ensure that the information contained in this publication is accurate at the time of publishing. Crane Ltd assumes no responsibility or
liability for typographical errors or omissions or for any misinterpretation of the information within the publication and reserves the right to change without notice.
REV01
Torque
Ibf.ft
Nm
40 - 50
55 - 65
70 - 90
95 - 120
Setting Gap Table
Recommended Setting Gap
20mm
25mm
45mm
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