13
4.8
The abrasive valve
Between the abrasive storage hopper and the feed spout there is a valve incorporating a permanent magnet in
order to control the abrasive flow towards the blastwheel. Any change in the opening of the magnetic valve
causes the amount of abrasive fed to the blastwheel to change. The change in the abrasive fed can be read from
the ammeter. The valve is hand-operated by the
abrasive control cable
. This control cable is located on the
control box and can be adjusted so that any quantity of abrasive can be fed to the blastwheel. Optimum blast
cleaning power is reached when the ammeter indicates the operating current. It is not permitted to blast with a
higher current value.
4.9
Separator
The abrasive separator is mounted to the end of the
rebound plenum. It separates the abrasive from
contaminants and feeds the cleaned abrasive back to
the abrasive circuit. A wire mesh is fitted to prevent
any large contaminants from getting into the blast
wheel. In order to clean the wire mesh drawer, the
separator cover can be removed or the wire mesh
drawer can be removed from the side.
During operation U should check the separator tray
every 3 hours for foreign matter and large
contaminants.
4.10 Abrasive sealing
Magnetic seals are fitted to the front and the sides of the blast housing outlet and are surrounded by brush seals.
At the rear there is a seal sliding over the floor. The seals are employed to seal the blasting area in a way to
avoid leakage of any abrasive.
The correct height adjustment of the magnetic seals (8–10 mm) is very important for optimum functionability of
the machine.
The adjustment is done using the 2 setting screws (12). There is one setting screw at each rear wheel.
The height of the brush seals should be maximum 1 mm above the surface. Adjustment is effected through slotted
holes.
1
Separator
7
Defloctor
8
Clamp for cover
18 Separator drawer
(wire mesh)
19 Separator cover
12
Setting screw rear wheel
(quantity: 2)
One on each rear wheel.
17+18+19+20 Rear seal
8
Side magnets
9
Front magnet
10
Brush seal side
11
Brush seal front
