12
13
6 - USE OF THE MACHINE
6.1 - OPERATING PRINCIPLES
The sieved mortar falls into the hopper. From here it is
pumped by means of a gravity ball valve pump up to the
place where it is need through rubber hoses and sprayed
with a spraygun (or various type depending of the ma-
terials used) where material is finally pushed by the air
coming from the built-in the machine.
The start and stop of the machine are controlled directly
by the operator at the spraygun, opening and closing the
air cock of the gun itself (15).
Every spraygun is made of:
a material coupling (16),
an air coupling (17),
an air cock (15),
an air nozzle (18),
a deflector (19).
Generally with smaller size deflectors material is sprayed
with a wider spray pattern and vice versa.
Through the by-pass lever (20) it is possible to pump the
material into the hoses (horizontal position) or to recycle
it into the hopper (vertical position).
Therefore it is possible to start the unit without load, or
in case of a blockage in the
hoses or in the spraygun, to
discharge the pressure pre-
sent in the hoses (vertical
postion).
The safety device, a tor-
que limiter, disengage the
trasmission between the en-
gine and the pumping group
in order to avoid dangerous
overpressures on the hoses
and on the pumping group.
15
20
16
15
17
18
19
Summary of Contents for UNI 30 D
Page 4: ...4 ...