Electronics 590-24 - Manual (Page 9)

9
For gravity-assisted applications (valve located on the top of blast cabinet, below the media
hopper) provide an aspiration air inlet, with a recommended minimum opening of 12mm, to
convey the media to the nozzle. Do not restrict this air inlet since it will increase the suction
and may pull media through the valve.
Model *XXXX MagnaValve General Arrangement
For suction-type nozzle applications there is no need to provide supplemental mechanical
valves to isolate the MagnaValve from air pressure. The MagnaValve will to operate with a
maximum 5-psi air pressure differential from top to bottom of the valve. The MagnaValve
has no moving parts, but operates by using a magnetic field to restrict the flow of shot.
During operation the nozzle creates a venturi suction to draw the shot into the nozzle. The
shot hopper is at atmospheric pressure. The MagnaValve dispenses shot into a mixing
chamber (tee) where aspiration conveys the shot to the nozzle. A mechanical shut-off
valve should be located above the MagnaValve to allow it to be removed for clearing of
debris without the shot hopper. The MagnaValve can be enabled at the same time as the
application of air pressure to the nozzle. It is not necessary to sequence the start-up, as in
direct pressure applications
HOSE TO
SUCTION NOZZLE
MIXING TEE
6” MINIMUM
OPTIONAL
MANUAL
SHUT OFF
VALVE
MAGNAVALVE
UNIONS ARE
RECCOMENDED
FOR EASY REMOVAL
OF VALVE