Reduction In Blast Cleaning Rate - Contractor ECO-series Betriebsanleitung

6.3. Reduction in Blast Cleaning Rate

6.3.1 Low media level can diminish media flow. Inspect and fill if level is too low.
6.3.2 Improper metering valve adjustment. Regulate according to Section 4.3.3.
6.3.3 Reduced air pressure. A malfunctioning regulator, a dirty filter element in the air
filter, a partially closed air valve, a leaking air line or other air tools being used could be causes.
6.3.4 The blast hose or nozzle is blocked. Blockage can be the result of a missing
debris screen or incorrect metering valve adjustment allowing heavy media flow. Examine
media valve adjustment according to Section 4.3.3.
6.3.5 Worn out nozzle. Examine and replace if damaged or worn out.
6.3.6 Worn out blast hose. Inspect the hose for leaks and soft spots. Replace if
damaged or worn out.
6.3.7 Moist blast media. Frequent bridges or blockage near the metering valve can be
caused by moisture. Refer to Section 4.3.3.
6.4. Air only (no media) comes out the nozzle
6.4.1 Ensure that media is in the machine.
6.4.2 Check that the media metering valve is not in the fully right or fully left position.
6.4.3 Check that the metering valve is not blocked by fully opening the metering valve
and closing the choke valve. Depress foot pedal to exhaust any obstacles. Should the problem
not be rectified by this procedure, release pressure in the machine and open metering valve
and check for foreign objects.
6.4.4.Ensure that the tubing leading from the diaphragm outlet valve is not blocked or leaking.
6.4.5. Media metering valve requires service. Refer to metering valve operating manual.
6.5. Neither media nor air comes out the nozzle
6.5.1 Release pressure in the machine and check for obstruction in the nozzle.
6.5.2 Check that that blast machine is pressurized by depressing the foot pedal. Is this
is not the case, refer to Section 6.8.
6.5.3 Ensure that metering valve and choke valve are opened.
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