Graco EQ300C manual Cleaning the Auto-Vent Valve

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Cleaning the Auto-Vent Valve

After the pop-up has been closed while filling the pot, the auto-vent valve should release air (you should be able to hear the air venting).

The pot pressure gauge will not show pressure until the auto-vent valve has bled all of the air and sealed. If the auto-vent valve does not release air, or if water leaks from the stem during the fill process, the stem valve may be clogged or faulty.

Perform the following procedure to clean a clogged auto-vent valve.

1.Try to push and quickly release the valve with your finger. If that does not cause the valve to seal, open the dump valve to release all of the pressure in the pot.

2.Turn the selector valve to RINSE.

Repair

3.Use the rinse hose to force water backwards into the valve stem.

NOTE: If the previous steps fail to resolve the issue, replace the whole valve assembly (EQ1860).

NOTICE

The valve stem itself is internally attached to the float and it is not field-serviceable. Do not try to remove the valve stem. Damage to the equipment will occur.

334667B

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Contents EcoQuip Vapor Abrasive Blast System Important Safety InstructionsRelated Manuals ModelsDust and Debris Hazard Burn Hazard Metric OEM System GuidelinesCompressor Size and Hose Length Minimum ID Metric EQ300C and EQ600C System Component IdentificationKey DataTrak ControlsDataTrak see DataTrak Controls, Pressure Relief Procedure Operation Checklist Before StartingConnecting the Blast Hose and Air Hose Setting Up the Equipment 10 gal 200-500 lb Ti24824a 0 0 0 8 8 0 0 0 3 Blasting on Higher Surfaces Blasting TipsSteel Metering Valve SettingsGrit Size Blast Pressure Abrasive Dose Blast Angle General WoodUsing the Wash Feature Refilling the Pot with Abrasive Shutting Down Operation Winterizing the Equipment See Repairing the Main Air Regulator TroubleshootingProblem Cause Solution See Cleaning the Auto-Vent Valve,Intact. See Hose Schematic, See Setting Up the Equipment,See Repairing the Diaphragm Valve Procedure see Shutting Down,Setting Up the Equipment, Properly. See Hose Schematic,Metering Valve Settings, See Pressure Relief Procedure,If flushing does not solve the problem, see Checking for Leaks Troubleshooting ExamplesPneumatic Blast Control Circuit Perform Pressure Relief Procedure, Repairing the Main Air RegulatorRepair Flushing the Diaphragm Valve Perform the Pressure Relief Procedure, Repairing the Diaphragm ValveCleaning the Auto-Vent Valve Replace Battery Replacing the DataTrak BatteryApproved Batteries Replace Fuse Replacing the DataTrak FuseApproved Fuses DataTrak Part Series Letter Fuse Required EQ300C and EQ600C PartsPressure POT EQ300C and EQ600C Parts ListEnclosure Part Description Qty Enclosure Parts ListPressure Pot Pressure Pot Parts ListRef. Part Description Qty Hose Schematic Model Series Brakes Vapor Abrasive Blast Systems and AccessoriesEcoQuip Skid Systems EcoQuip Trailer SystemsModel Description Mobile/Skid UnitsTrailer Units ModelNozzles HosesModel Description Type Length Blast Control Common Spare Parts Other AccessoriesDimensions EQ300S Technical SpecificationsEQ600S Graco Information Graco Extended Warranty for EcoQuip Components