Graco 309550Y Theory of Operation, Gun Triggered Fluid Spraying, Gun Detriggered Air Purging

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Theory of Operation

Gun Triggered (Fluid Spraying)

Mix chamber (19) moves back, shutting off purge air flow. Impingement ports (IP) align with fluid ports of side seals (18c), allowing fluid to flow through mix chamber nozzle (N).

See page 13 to adjust cleanoff air valve (K).

KEY

Purge Air

Fluid

Cleanoff Air

Grease

TI3547a

Flow paths are not shown to scale, for clarity.

18c

TI3545a

Gun Detriggered (Air Purging)

Mix chamber (19) moves forward, shutting off fluid flow. Impingement ports (IP) open to air chamber (AC), allow- ing purge air to flow through mix chamber nozzle (N).

See page 14 for use of grease fitting (G).

Troubleshooting

KEY

Purge Air

Fluid

Cleanoff Air

Grease

TI3547a

Flow paths are not shown to scale, for clarity.

19AC

N TI3546a

309550Y

Image 25

Contents Plural Component, Impingement Mix Air Purge Spray Gun Manual Conventions ContentsRound Pattern Guns List of Models/Mix Chamber Selection GuideFlat Pattern Guns No., Series In. mm Flat Pattern Stud Wall GunIn. mm 1000 psi MPa, 70 bar 249525 249526Wide Round Pattern Gun Spatter Pattern GunFour-Hose Gun Non 11 Ratio GunsPersonal Protective Equipment Fire and Explosion Hazard Key Overall ViewIsocyanate Hazard Piston Safety LockKeep a and B Components Separate GroundingTurning Air Cap Follow Pressure Relief Procedure,Loss of Air Pressure Resin ISO SetupSetup Shutdown Pressure Relief Procedure Optional Fluid Manifold Optional ConfigurationsPosition Remove Front End,Optional Hose Position Follow Pressure Relief Procedure, page 15. AlsoFlat Spray Tips Maintenance Clean Air Cap Clean Outside of GunClean Muffler Clean Fluid ManifoldClean Passages Clean Mix Chamber NozzleClean Impingement Ports Nozzle Drill Bit Sizes Cbip Impingement Port Drill Bit SizesProblem Cause Solution TroubleshootingProblem Cause Solution Gun Triggered Fluid Spraying Theory of OperationGun Detriggered Air Purging Cutaway View Tools Required RepairLubrication Remove Front EndX Z Attach Front EndMix Chamber and Side Seal Cartridges 18 B Check Valves Piston Air Valve Piston Safety LockCheck Valve 26 Detail PartsRound Pattern Guns, Part No. Description QtySee Flat Pattern Guns, See Supplied Tools,Detail Views Round Pattern Guns Mix Chamber KitsFlat Pattern Guns Mix Chamber Part No. Reference GuideGun Repair Kits Flat Tip KitsCheck Valve Filter Screen Kits Flat Tip Part No. Reference GuideKit Part No Qty in Kit Drill Bit Size Illustration Nominal Drill Bit KitsDrill Bit Kit Air Purge Handle Cleanout Drill Kit119386 248969Wide Pattern Mix Chamber Kits AccessoriesStainless Steel Side Seal Kits Polycarballoy Side Seal KitsExtension Tip Seal Kits Extension Tip KitsExtension Tip Air Cap Kit Flat Pattern Stud Wall KitSolvent Flush Canister Kit Spatter Conversion KitPour Nozzle Kit Gun CoverGun Cleaning Kit Tip Cleanout ToolCirculation Manifold Air Flow Data in scfm m3/min Technical DataCategory Data Graco Information Graco Standard WarrantyToll Free