Graco 3A0420T Pressure Relief Procedure, Relieve a and B Fluid Pressure

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Pressure Relief Procedure

Pressure Relief Procedure

Follow Flush Mixed Material, page 28 when you stop spraying or dispensing; and before cleaning, checking, servicing, or transporting equipment.

Relieve A and B Fluid Pressure

1. Engage the trigger lock.

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2. Close the main air shutoff valve (CA).

CA

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3.Shut off heaters, if used.

4.Shut off feed pumps, if used.

5.Remove the spray tip and clean.

6.Disengage the trigger lock.

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7.Hold a metal part of the gun firmly to a grounded metal pail. Trigger the gun to relieve pressure.

8.Engage the trigger lock.

9.Close the dual shutoff handle (AE) and open the cir- culation handle (AC).

AC

AE

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10.Always flush the mix hose after relieving A and B fluid pressure through the mix manifold. See Flush Mixed Material, page 28.

11.Shutoff the solvent supply pump and repeat steps 6-8 to relieve solvent pressure.

If the mixed material has already been flushed, but pressure remains on the A and B pumps, pressure can be relieved back to the hoppers (J).

a.Close the main air shutoff valve (CA).

b.Open the circulation handle (AC).

NOTE: For longer valve life in abrasive fluids, it is advisable to relieve high pressure out through the gun when possible.

12.If you suspect the spray tip or hose is clogged or that pressure has not been fully relieved after follow- ing the steps above, very slowly loosen tip guard retaining nut or hose end coupling to relieve pres- sure gradually, then loosen completely. Clear hose or tip obstruction.

13.If static mixer, whip hose, and gun cannot be flushed because of mixed and cured material, very slowly loosen static mixer tube from mix manifold outlet to relieve pressure gradually, then loosen completely. Replace or clean clogged components.

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3A0420T

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Contents XP Proportioners Contents Related Manuals Fire and Explosion Hazard Skin Injection Hazard Toxic Fluid or Fumes Hazard Important Two-Component Material Information B Component Designations Changing MaterialsEquipment Designations Usage OverviewOver Pressure Protection Initial System Setup Models Cart-Mounted SystemsPump Volume Max Fluid Max Air Mix Gallon Packages Bare Proportioning Pump PackagesBuilding systems with bare proportioning pump Over Pressure Protection must be used, seeComponent Identification Mounting Components forFluid Control Assembly Main Air ControlsPump Key Solvent Flush Pump Kit 262393 optionalAir Controls Optional Accessories Fluid Line AccessoriesFlush Before Using Equipment Air LineLocation SetupGrounding Wire Systems with Explosion-Proof Heaters Hazardous location systems onlyCheck Motor Position Motor PositionChange Motor Position Connect Fluid Hose Bundles Remote Mix Manifold Only Connect Air SupplyConnect Static Mixers, Gun, and Hoses Pressure Relief Procedure Relieve a and B Fluid PressurePrime Empty System Prime a and B FluidsPrime Solvent Flush Pump Heat Fluid Follow Prime Empty System,Spray To Adjust the Restrictor Side Mix Manifold RestrictionFlush Mix Manifold, Hose, and Spray Gun Follow Pressure Relief Procedure,Flush Mixed Material Use Optional Solvent PumpProcedure GuidelinesShutdown ParkSystem Verification Maintenance Troubleshooting Problem Cause SolutionTrouble Area Resin Pump Leakage Pump TroubleshootingHardener Pump Falling Resin PumpRemove Displacement Pump Pump AssemblyRemove Pump Assembly RepairReplace Air Filter Element Replace Air Control AssemblyRemove Motor Replace System Air RegulatorAir Control Assembly Air FlowFluid Circulation Manifold with Over Pressure Relief Valves Mix Manifold AssemblyReplace Over Pressure Relief Valves Target Opening Manifold Valve Fluid Circulation Manifold Replacement GuideCirculation Pressure Color Psi MPa, bar Use withHoppers Optional Solvent PumpOptional Fluid Heaters Service and RepairReplace Parts Cart-Mounted SystemStandard Mix Manifold Models Quickset Mix Manifold Models Parts Common to All Systems Description Qty WasherParts Varying By Model XP35 Systems Ref Part Description Coupling 283101 283102 283201 283202 283301 283302 283401 283402 Parts Varying By Model XP70 Systems Part Description Bare Proportioning Pump Package Model 571100 shownParts Common to All Pump Packages Parts Varying by Pump PackageAir Controls Qty Ref. No. Part No. DescriptionPart Description Qty Ref Assembly 262784 XP35 262783 XP50 262806 XP70Fluid Circulation Manifold with Over Pressure Relief Valve Manifold to also fit Series a XP Proportioners withPump Filter O-rings packs Recommended Spare PartsPump Repair Kits Recirculation/Overpressure valve seeAccessories and Kits Acceptable For Use in Explosive AtmospheresNot Approved For Explosive Atmospheres Technical Data Top View DimensionsSide View Floor Mounting Dimensions, Top View Bare Proportioner Mounting Hole Dimensions Wall Mount Bracket 262812 Dimensions Floor Stand 24M281 Dimensions Hydraulic Unit DimensionsDimensions 3A0420T Graco Standard Warranty Graco Information