Maintenance And Cleaning; Technical Characteristics - Mestra 080218 Guia Del Usuario

MAINTENANCE AND CLEANING

In order to achieve a long working life of the machine,
we strongly recommend you:
 Always use high quality aluminium oxide. Talleres
Mestraitua, S.L. recommends the use of MESTRA
aluminium oxide.
 Preferably use dry-piston air compressors. The
presence of oil particles in the air could make the
sand compact and obstruct the gun's nozzle.
 To prevent the inner walls of the cabin wearing away
due to abrasion, do not aim the aluminium oxide blast
straight at the cabin walls.
 Periodically remove the aluminium oxide from the
cabin. To do this, use the drain plug in the bottom of
the hopper.
 For an overall cleaning of the unit, use a dry cloth or
moistened with a proper product.
 In case of obstruction of the gun (F), dismount the
nozzle holder. Clear the nozzle by blowing in the
opposite direction to the air flow, or, if needed, by
using a pin or a thin wire. Then set the gun again,
making sure it is correctly centred.
Nozzle
 If the nozzle came loose, glue it to its holder with
cianocrilate. The nozzle should be level with the
inner surface of the nozzle holder, to make sure that
the distance from the injector to the nozzle is 4.5 mm
and the Venturi effect takes place.
 Always use high quality aluminium oxide. Talleres
Mestraitua, S.L. recommends the use of MESTRA
aluminium oxide. The gun (Ø 3 mm nozzle) can blast
aluminium oxide up to particles of Ø 300 micron. If
you use aluminium oxide particles bigger than Ø 300
micron, you may need to remove the filter (K) placed
at the end of the gun's pipe, inside the hopper (Fig.
2). Without any filter obstructions in the nozzle will
be more.
6
Nozzle
Nozzle holder
Nozzle level
with holder
Injector
4,5
PRECAUCIONES
 Never exceed a 6-bar pressure (0.6 MPa). The
optimal working pressure lies between 2 and 5 bar
(0.2 and 0.5 MPa).
 Never force the motor shaft to rotate by hand,
whether the basket is fitted or not. The motor's inner
mechanism could be damaged.
 Always work with the cabin lid closed and correctly
protected. Use protection mask and goggles.
 Connect the cabin's outlet hose to an aspiration unit.
 If the protection sleeves (C) tear or wear, replace
them immediately.
 Do not allow children or unskilled personnel to
operate the machine.
 Always use a high-quality aluminium oxide (it is
strongly recommended to use MESTRA aluminium
oxide). A very low-quality aluminium oxide can
produce obstructions in the nozzle.
 Make sure that the aspiration unit can suck abrasive
particles. We strongly recommend the MESTRA
Eolo Plus Ref. 080532 aspiration unit.
 Connect the power cord to a grounded 230 V, 50/60
Hz power source.
 In case of leaks in the pressured air circuit, consult
the installation engineer immediately.

TECHNICAL CHARACTERISTICS

Height:
Width:
Depth:
Weight:
Working pressure:
Maximum air consumption:
Voltage:
Power consumption:
430 mm
320 mm
310 mm
5.5 kg
2 - 5 bar
0.2 - 0.5 MPa
90 L/min (5 bar)
230 V, 50/60 Hz
15 W