MASTER plastering machine
12
The process below would correspond to the pressure checker option:
After having put the mixer into the tube, having put the head engine into position and locked it
with the side lock, the hydraulic pressure checker is connected to the stator outlet using the open
evacuation key. Running shortly the head engine (1 or 2 seconds approx.), the pressure checker is air
emptied. Then, the evacuation key is closed and the head engine is started again for some seconds,
observing at the same time the manometer indicating arrow.
The upper fluctuation value on the manometer is the pump regulated pressure!
If the pump pressure needed is exceeded or not reached, it can be fixed by loosening or
fastening evenly the three fastening screws of the stator if readjustable stators are used.
Hydraulic check rule: if we work with gypsum rendering using a Dn 25 hose up to 10 metres
long, the manometer must indicate 25 bars. For every extra hose metre we have to add one bar until a
maximum of 35 bars (for example, 15 metres hose=30 bar pressure).
When working with cement or lime plaster, or when using thicker hoses, the said value will be
reduced from 3 to 8 bar. After having fastened the pump, the evacuation key of the pressure checker is
opened to disconnect it and connect later a mixing water hose on the upper connection of the mixing
tube.
3.10
Amount of water needed
Just before starting to work, it is necessary to make sure that there is sufficient water on the
mixing chamber (the rotor head is covered). If needed, we will add water to the mixing chamber as
indicated on the previous paragraph, as on the contrary we run the risk of the dry material coming into
the stator.
WARNING!
The non-fulfilment of what previously indicated can cause an early wear of the
stator or even its breakdown just in second’s time, as we start the pump engine using dry
material without water.
3.11
Load with dry material
After being sure that the blocking door between the dry material hopper and the mixing tube is
closed, the material deposit is filled in with dry material from the building site.
3.12
Starting the machine
The feed auger switch and the main switch are activated, and then the pump engine is started
using the starter button (green). Open at one the material door and regulate the material consistency by
adjusting the water flow with the regulation valve until the working conditions are achieved.
Disconnect the pump and join the product hose to the mixing chamber outlet. Control the material
consistency on the hose end. With the machine out of order, the spraying gun is connected to the
product hose. Rectify the water regulation until the consistency required is achieved.
