Fire ventilation

plastic explosive is placed in the frame with a directional
explosive effect, a copper material that cuts through the
roof, foam plastic that holds the component parts together,
and tape for adhesion to the underlayer.
Hydraulic powered eccentric cutting machines have the
large advantage that the blade works eccentrically, i.e. the
driving does not take place in the centre of the blade. The
blade can therefore work in material with a depth greater
than the radius of the blade (typical working depth approx.
25 cm). It can work in most materials. The disadvantage of
the machine is that it requires hydraulic power by means of
a separate hydraulic unit, and that it requires cooling.
Water cutting involves using water at high pressure to cut
an opening in a structure. The pressure can vary, depending
on the equipment, from 200 to 300 bar. The water fl ow
normally varies from 25 l/min. to 50 l/min. An abrasive
additive (cutting agent) is often needed to cut through hard
materials (roof materials etc.). A cooling and suppression
effect is also achieved in conjunction with making an opening.
Equipment for water cutting can normally cut
through all the materials commonly found.
Water cutting.
Hydraulically powered
eccentric cutting
machine.
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