The MORGRIP has a
modular design, comprising a centre section housing and one or a
series of gripping segments on either side of the centre section.
(The number of gripping segments pairs applied depends on the
pressure rating of the coupling). Each gripping segment houses a
series of spring loaded ball bearings positioned circumferentially
round the inside of the segment body.
To connect two
lengths of pipe the gripping segments are slid over the end of
each pipe, with the centre section housing being positioned over
the pipe joint between the gripping segments. All segments and
centre housing are then pulled together by stud bolts located
around the coupling circumference. When the bolt load is applied,
the ball bearings roll and swage into the external surface of the
pipe and provide the mechanical grip.
The ball bearings
being independent of each other, are capable of compensating for
oval pipe and surface imperfections.
preparation required in order to install the coupling is that the
pipe's outer surface should be free from surface coatings, as the
seals are capable of compensating for slight imperfections in the
pipe's surface and diameter tolerances.
To allow the
indentation of the ball bearings a 'pre-set' gap exists between
the ball segments fitted to either side of the pipe and the centre
section. Tensioning the bolts causes the segments to move together
causing the balls to roll, at the same time, the couplings radial
seals are compressed and seal onto the pipe's periphery.