Floor Screed Machine HD 50
26
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However, this machine has a safety system which prevents opening of the vessel lid when it is under
pressure. Prior to opening the vessel lid with the lever (2), it is essential to activate the safety lever (3) which in turn
activates the opening of the escape valve (4) at the top of the boiler, and in this way any surplus pressure inside the
vessel is released.
Clean the rims of the tank. Change the rubber seal immediately if it shows any signs of cracking or if any
material has got into the join.
Manual mode
This mode of transport is used when a specific amount of mixture has to be transported, for example at the
end of the working day and there is no need to transport all the mixture inside the tank.
When about to transport the mixture, turn the tap in lower part of the control panel to manual position, which
will automatically stop the compressor and enable the top of the mixer tank to be opened and check the amount
remaining inside.
When this has been checked, turn the tap back to position 1, and continue the transport process if you wish to
dislodge all the material inside the mixer tank.
7.5.1
Correct transport pressure
Upward transport:
If you need to transport material to upper floors the elevation pressure will be between 4 to 5.5 bar.
The elevation pressure is regulated with ball valves for upper and lower air. The regulation depends on the
pipe length and conduct , and the proportions of the material mixture in the mixer tank.
If any of the above-mentioned variables change, the pressure should be regulated once more and the pressure
gauge should always be taken into account in this case (
2
):
If the elevation pressure is raised to more than 4 to 5 bar, continue closing the upper tap (
5
) and open the
lower tap (
6
).
If the elevation pressure goes down to less than 4 a 5 bar, continue to open the upper tap (
5
) and close the
lower tap further (
6
).
Downward transport
If the mixture has to be pumped downwards for example, to a basement, the optimum transport pressure is
only about. 2 to 3 bar. Here also the transport pressure is regulated with ball valves for upper air (
5
) and lower (
6
).
Regulation depends on the length and the transport of the pipes as well as the proportion of mixture of the material in
the mixer tank.
Transport downwards is difficult, as the carrying air can pass through the material plugs in the pipe. For this reason
the transport pipes need to be elevated (see illustration below).
Ground level transport
Ground level transport for example, ground floor or mezzanine is also quite a difficult operation. The
optimum transport pressure is approximately 3 to 4 bar.
For this reason the transport pipes need to be raised (see illustration below).
Laying the transport hoses
Apart from the correct transport pressure, the adequate laying of the transport pipe is extremely important for
the perfect transfer of the material. Raise the pipe directly behind the machine and it is also recommended that the
pipes be raised every 15 to 20 meters in long transport routes, which are also flat with no slopes. (See illustration
