Electronics 590-24 - Manual (Page 10)

10
Notice:
1)Use pipe unions to easily alignment or remove of the MagnaValve. With the provided
manual shut-off valve there is no need to drain the pressure pot of shot to clear con-
taminants that have lodged in the MagnaValve.
2)If a negative pressure exists in the shot hopper (i.e. when a pneumatic reclaim system is
used to recycle the shot), then allow about 6-inches (15 cm) minimum distance be-
tween the top of the MagnaValve and the bottom of the shot hopper. This column of
shot will act as a dam to isolate the pressure differences and prevent air and shot from
being sucked back up into the hopper.
3)The aspiration air inlet should be a minimum of 0.5 inch. Smaller openings will permit a
very large negative pressure that may draw shot through the MagnaValve and cause
erratic operation. The nozzle must have adequate aspiration air volume to convey the
shot through the blast hose. The inlet can be as large as 1.25 inch, but install a screen
to prevent the ingestion of unwanted debris into the air stream.
4)Fit a vacuum gage (negative pressure gage) temporarily to the aspiration inlet to meas-
ure the suction efficiency of the nozzle. This gage can take two types of measure-
ments, static and dynamic. The static reading is the largest reading and measured by
denying any aspiration air. Note: in some cases the negative pressure may be suffi-
cient to draw shot through the MagnaValve. Do not operate the system with this gage
in place, as this will prevent introduction of aspiration air needed to convey the shot to
the nozzle. The second type of measurement, dynamic, is performed with the gage in-
stalled and does not alter the aspiration air volume. This type of measurement does
not interfere with system performance and can be left in place permanently if desired.