MAGUIRE MPL Series, Установка, эксплуатация и обслуживание, Страница: 18 / 23

M A G U I R E P R O D U C T S , I N C .
18
M P L M L S e r i e s V e n t u r i L o a d e r s

ADJUSTMENTS
1. AIR FLOW CONTROL VALVE:
The idea is to use as little air as possible and still convey pellets. Conveying can occur with
as little as 20 PSI air. Read and adjust the pressure gauge WHILE CONVEYING, to
determine correct conveying pressure. If pressure drops too low for proper operation, the
diameter of the AIR SUPPLY line is TOO SMALL.
Too much air flow wastes air and may create dust problems. Pellets may bounce out of
the hopper from under the lid.
A very low flow of air may not convey pellets properly. Use just enough air to ensure a
steady continuous flow.
2. LEVEL SENSOR:
The SENSOR should be adjusted to "turn on" when about half of the sensor holder is
covered. A very small screwdriver is required for adjustments. The adjustment screw and
on/off pilot light are located in the back of the sensor. Be sure sensor is always fully seated
in the sensor holder.
TROUBLESHOOTING
FAILURE TO CONVEY MATERIAL:
1. Check that air supply is adequate.
Check the PRESSURE GAUGE while loader is ON. It should read between 20 and 80 PSI
WHILE LOADING.
2. Check for obstructions in the conveying line.
3. Disconnect the material line from the venturi loader and confirm that the venturi moves air
correctly with the material line removed.
DUST problems:
We rely on the loose fit of the lid to allow air to escape from the hopper. The loader will not
work if you gasket the lid. Over time, a small amount of dust may accumulate on the
outside of the hopper. If this is a problem, we can punch a large (3 inch) hole in the lid and
add an automotive style air filter to the top of the lid. Thin gasketing can then be added to
the underside of the hopper lid.
A draw back is that this becomes a possible source of cross color contamination and is
also an occasional maintenance item. We believe it is simpler to clean off this dust when
color changes are made, thereby avoiding the maintenance required by the addition of a
filter.