5 Special precautions regarding the LKD 440X320
Study the instructions carefully and pay special attention to the warnings!
5.1
Installation
Oval Cover Type LKD 400 x 320
In order to obtain a perfect seal and a good function of our manhole cover it is essential that the welding of the casing is carried
out carefully and correctly. If the cover is fitted on a vertical tank wall, the hinge of the casing must always be placed on the left
hand side. For thin-gauged containers, i.e. sheet thickness less than 2.5 mm, welding is easier, if the hole is marked in such a
way that a 10 mm edge can be burred up as sharply as possibly.
When the hole is cut and the edge burred up, if applicable,
the frame is inserted, and tack-welding is now carried out on
points placed opposite each other all the way round, in the
sequence shown in figure 1.
4200-0000
The frame may now be fully welded on both sides. A control
should be made by removing the rubber seal, and cover and
frame should be assembled loosely to ensure that they fully
contact each other over the whole surface.
Any stresses are removed by hammering the sheet around
the casing.
3
7
2
6
4
8
1
5
4200-0001
Figure 1. Installation of LKD
9
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