Graco Inc 313872B, 257999 Theory of Operation, Gun Triggered Fluid Pouring, Gun Detriggered

Page 18

Theory of Operation

Theory of Operation

Gun Triggered (Fluid Pouring)

Purge rod retracts, opening the impingement ports and allowing fluid to mix and flow through the nozzle. Throat Seal Liquid lubricates the purge rod.

Purge Rod

Throat Seal Liquid

Side View

TI14476a

Top View

TI14485a

Gun Detriggered

Purge rod extends, closing the impingement ports and stopping fluid flow. Throat Seal Liquid lubricates the purge rod.

Purge Rod

Throat Seal Liquid

Side View

TI14477a

Top View

TI14486a

18

313872B

Image 18

Contents Important Safety Instructions EP GunContents Related Manuals Orifice Flow Area Ratio Chart ModelsFixed Orifice Flowrate Data EP Fixed Orifice Flow DataVariable Orifice Flowrate Data Orifice DiameterFlowrate gpm Variable Orifice Flowrate Data 1500 PSI Variable Orifice Flowrate Data 2000 PSI Toxic Fluid or Fumes Hazard Fire and Explosion Hazard Important Two-Component Material Information Changing Materials Red and B Blue ComponentsGrounding Piston Safety LockThroat Seal Liquid Trigger LockLoss of Air Pressure Hook SupportHook Support 313872B Component Identification KeyCutaway View Theory of Operation Gun Triggered Fluid PouringGun Detriggered Setup Adjust Orifices Perform Bleed Throat Seal Liquid Cartridge pro- cedure. SeeOrder to increase the pressure, turn the needle clockwise Follow Pressure Relief Procedure, Optional Hose PositionPressure Relief Procedure Short Term Shutdown Perform Pressure Relief Procedure onShutdown Long Term ShutdownLubrication MaintenanceSupplied Tool Kit Bleed Throat Seal Liquid CartridgeClean Outside of Gun Flush GunClean Breather Plug Clean Fluid ManifoldFollow Pressure Relief Procedure Clean Check Valves Clean Fluid Housing Passages Follow Pressure Relief Procedure onRemove Front End, see Clean Orifice Replace Mix Chamber and Front Seal Perform Replace Throat Seal Liquid Cartridge,Repair Tools RequiredReplace Throat Seal Liquid Cartridge Perform Bleed Throat Seal Liquid Cartridge pro- cedure, see Perform Pressure Relief Procedure, Remove Front EndDisassemble Front End Assemble Front EndSee Attach Front End procedure Attach Front EndPistons and Bulkhead Access Pistons Bulkhead Shaft Purge Rod Solenoid Valve 26-3.39 Nm. See Component Identification onTroubleshooting Problem Cause SolutionProblem Cause Solution Electrical Diagram Parts Model 257999 ShownOrifice, Auto Hand-Held RingOrifice, Auto Hand-Held Kits See OrificeKits on Orifice 24C751 Orifice Housing 24C756 Ring 24C805 24C815 Kits Kits Located inside back cap Orifice Kits Impingement Kit Type and Kit NumberModel Iso Model Polyol Orifice Kit Drill Bit Kits Kit Drill Bit Qty Orifice Size NumberKit Illustration Complete O-ring Placement Guide Ref PartAccessories Solvent Flush Canister Kit Solvent Flush Pail Kit248299 5.0 gal liter Pail Technical Data Models without Handle 6.4 lb 2.9 kgDimensions Ref Dimension, in. mmTechnical Data 313872B Graco Standard Warranty Graco Information