Graco 295530 Operation, Parts, Service And Repair
Model d spray gun
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Operation, Parts, Service and Repair
Model D Spray Gun
For use with non-flammable polyurethane foams. For professional use only.
Not for use in explosive atmospheres.
See page 2 for model information.
1000 psi (7 MPa, 70 bar) Maximum Working Pressure
Important Safety Instructions
Read all warnings and instructions
in this manual. Save these instructions.
311320G
ENG
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Table of Contents
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Summary of Contents for Graco 295530
- Page 1 Operation, Parts, Service and Repair Model D Spray Gun For use with non-flammable polyurethane foams. For professional use only. Not for use in explosive atmospheres. See page 2 for model information. 1000 psi (7 MPa, 70 bar) Maximum Working Pressure Important Safety Instructions Read all warnings and instructions in this manual.
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Page 2: Table Of Contents
Daily Shutdown ......12 Pressure Relief Procedure ....13 Models Part No. 295530 295531 295532 295533 Spray Pattern Adjustment . -
Page 3: Warnings
Warnings The following general warnings are for the setup, use, grounding, maintenance, and repair of this equipment. Additional, more specific warnings may be found throughout the body of this manual where applicable. Symbols appearing in the body of the manual refer to these general warnings. When these symbols appear throughout the manual, refer back to these pages for a description of the specific hazard. - Page 4 Warnings FIRE AND EXPLOSION HAZARD Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. To help prevent fire and explosion: • Use equipment only in well ventilated area. • Eliminate all ignition sources; such as pilot lights, cigarettes, portable electric lamps, and plastic drop cloths (potential static arc).
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Page 5: Overall View
Overall View Major Components Gun Block Coupling Block Coupling Block Mounting Screw . 1: Major Components 311320G Spring Retainer Case Valving Rod Closure Spring Valving Rod Positioner Piston Rod Trigger Air Cap Adjustment Valve Overall View Valving Rod Adjustment Screw Valving Rod Stop Bar Valving Rod... -
Page 6: Centerline Components
Overall View Centerline Components Gun Block Mounting Screw Valving Rod Assembly Felt Wiper Retainer Gun Block R-Resin Check Valve Screen Mounting Screw . 2: Centerline Components O-Ring A-Iso Check Valve Closure Screw Coupling Block Gaskets Screen Screw Seal Screen Snap Ring Mixing Chamber Case Air Cap 311320G... -
Page 7: Operation Basics
Operation Basics To prevent accidental gun operation, always disconnect air supply before servicing gun or anytime gun is not in use. Isocyanate Hazard Spraying materials containing isocyanates creates potentially harmful mists, vapors, and atomized particulates. Read material manufacturer’s warnings and material MSDS to know specific hazards and precautions related to isocyanates. - Page 8 Operation Basics Manual Valves Triggering gun with manual valves closed may cause crossover if gun ports contain residual chemical. Never open manual valves unless coupling block is secured to gun or exit port is directed into flush pail. 1. Open manual valves using 5/16 in. nut driver;...
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Page 9: Air Hose Connection
Air Hose Connection To CONNECT air hoses, pull back sleeve of female fitting, insert male fitting and slide sleeve forward to secure connection. To DISCONNECT air hoses, pull back sleeve of female fitting and remove male fitting. Pull Sleeve . 5: Air Hose Connection 311320G Valving Rod Adjustment Screw... -
Page 10: Air Cap Adjustment Valve
Operation Basics Air Cap Adjustment Valve Use to control amount of air that passes through air cap and over mixing chamber tip. Airflow helps keep tip free of sprayed chemical. Too much air may distort spray pattern and create overspread. Too little air will not prop- erly clean end of valving rod. -
Page 11: Initial Set Up
Initial Set Up 1. Remove coupling block from gun. 2. Check valving rod clearance in closed posi- tion. Rod should extend approximately 1/32 in. (1 mm) beyond tip of mixing chamber. If it does not, see Valving Rod Adjustment procedure, page 21. 1/32 in. -
Page 12: Daily Start-Up
Daily Start-Up Daily Start-Up Ensure gun is attached to coupling block and air hose, and the proportioning unit is at desired temperature and pressure. 1. Connect air supply to gun, page 9. 2. Adjust air cap valve, page 10. 3. Saturate felt in felt wiper with gun cleaner using flush can. -
Page 13: Pressure Relief Procedure
Pressure Relief Procedure Relieve pressure before cleaning or repairing gun. 1. Close both manual valves. Manual Valves 2. Trigger gun once onto waste area to relieve fluid pressure in front end of gun. 3. Disconnect gun air supply, page 9. 4. -
Page 14: Spray Pattern Adjustment
Spray Pattern Adjustment Spray Pattern Adjustment This adjustment may create a large mass “bun” of urethane foam. Very high tempera- tures created by chemical reaction inside a bun may not dissipate after outside surface has cooled. A large bun may continue to react for several hours after spraying until flash (burning) point of foam is reached. - Page 15 tern opens as adjustment is made (F 12). . 12: Opening Spray Pattern 5. Fine tune spray pattern: a. After you back out adjustment screw, make fine adjustments (1/8 turns or less in either direction as required) to obtain pattern shown in F .
- Page 16 Spray Pattern Adjustment e. If buildup recurs shortly after cleaning tip, remove air cap and ensure inside is clean. Reinstall air cap and ensure airflow is properly set. If no buildup occurred on air cap, check the fol- lowing items in this order and readjust if neces- sary: •...
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Page 17: Maintenance
Maintenance Gun Service Kits Use either the 1-Quart Gun Service Kit (296980) or 3-Gallon Gun Service Kit (296981) to perform daily flushing of spray gun without disassembly. . 15: 1-Quart Gun Service Kit For more information about the 1-Quart Gun Service Kit, see manual 311340. -
Page 18: Clean Spray Gun Procedure
Maintenance Clean Spray Gun Procedure Thoroughly flush gun block with gun cleaner before removing valving rod or mixing compo- nents from gun block. Also allow chemicals in spray gun to cool before cleaning. This procedure makes use of the 1-Quart or 3-Gallon Gun Service Kit. -
Page 19: Repair
Repair Shut down proportioner and allow chemicals to cool before performing any repair proce- dures. Clean Center Line Components using Gun Service Kit prior to performing any repair pro- cedures. Filter Screen Removal and Service 1. Perform Pressure Relief Procedure (page 13) and Clean Spray Gun Procedure, page 2. -
Page 20: Clean Injection Slots
Repair Clean Injection Slots 1. Perform Pressure Relief Procedure (page 13) and Clean Spray Gun Procedure, page 2. Remove check valves. A-Iso Check Valve (tall hexhead) Clean-out Port (both sides) R-Resin Check Valve (short hexhead) . 18: Check Valves 3. Inspect check valves to ensure sleeve is secured, and place check valves in sepa- rate containers of gun cleaner. -
Page 21: Valving Rod Adjustment
Valving Rod Adjustment In closed position, valving rod should extend approximately 1/32 in. (1 mm) beyond tip of mixing chamber. If it does not, follow this pro- cedure: 1/32 in. . 19: Valving Rod (Closed Position) 1. Perform Pressure Relief Procedure (page 13) and Clean Spray Gun Procedure, page 2. -
Page 22: Centerline Component Removal
Repair Centerline Component Removal Refer to Figure 2 to view centerline com- ponents. 1. Perform Pressure Relief Procedure (page 13) and Clean Spray Gun Procedure, page 2. Remove air cap by hand, turning it counter- clockwise. 3. Remove screen screw assembly. Flush and place in gun cleaner. - Page 23 a. Remove ball and spring assembly. Hold ball and unscrew assembly. If dirt or material build-up prevents complete removal of the spring, screw it back in. Soak assembly in gun cleaner and try to remove it again. If ball and spring assembly cannot be removed undam- aged, replace it.
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Page 24: Centerline Component Installation
Repair Centerline Component Installation All gun block parts must be clean and free of damage before installation. 1. Remove felt wiper assembly from rear of mixing chamber. 2. Ensure internal mixing chamber parts are in place. 3. Insert chamber into gun block. Align key- way in chamber with pin protruding from top of hole in block. - Page 25 10. Replace valving rod spring and spring retainer case. Grasp knob, push in, and turn clockwise to lock in place. 11. Replace air cap. 12. Replace check valves and screen screw assembly. 13. Replace closure screw in top of gun block. 14.
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Page 26: Parts
Parts Parts Model D Spray Gun Assembly 311320G... - Page 27 296623 Screen-80 mesh (pack of 50) 295595 Snap ring 296624 Kit, gun block screen screw (includes U, V, W) Model No. Description 295530 D-55 D-55- 295531 RECIRC 295532 D-62 295533 D-70 Table 1: Model D Gun Assembly, Parts by Model Number 311320G Ref.
- Page 28 Parts Reference Size 296578 K (valving rod) 296594 (N-800) 296595 (N-810) 296584 (L-800) 296590 (L-800-LM) 296585 (L-810) AC (chamber) 296591 (L-810-LM) 296838 AK (air cap) 297007 Cleanout (pack of 2) spade Table 2: Model D Gun Assembly, Parts by Mixing Chamber Size Mixing Chamber Size 296579 296580...
- Page 29 Standard Mixing Chambers Six standard mixing chambers are available. The following table provides a general description about use and operational performance of each chamber. Actual pattern sizes and outputs achieved may vary depending on material viscosity, hose length, condition of equipment, environ- ment, working pressure, and additional factors.
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Page 30: Air Cylinder Assembly
Parts Air Cylinder Assembly Part Number 296632 Ref. Part No. Description A❄ 107083 O-ring, fluoroelastomer 295494 Pan head machine screw, 8-32 x 3/16 in. 295177 Front head blank D❄ 296627 U-cup (pack of 5) E❄ 296628 U-cup (pack of 5) 295178 Cylinder G❄... -
Page 31: Coupling Block Assembly
Coupling Block Assembly Model 295887 Model 295887 (Standard) Ref. No. Part No. Description 295662 Flush seal pipe plug, 1/8 in. 295888 R-swivel fitting 295889 A-swivel fitting 296626 Manual valve assembly (pack of 2) 295619 Mounting screw, 15/16 in. 295693 Flush seal pipe plug, 1/36 in. 295886 Coupling block 311320G... -
Page 32: Notes
Notes Notes 311320G... -
Page 33: Technical Data
Technical Data Category Maximum Fluid Working Pressure Maximum Air Inlet Pressure Minimum Air Inlet Pressure Maximum Output (flow rate) Minimum Output (flow rate) Air Inlet Size A Component (ISO) Inlet Size R Component (Resin) Inlet Size Length Height Width (without coupling block) Weight Wetted Parts * Theoretical: actual results will vary with operating conditions... -
Page 34: Graco Standard Warranty
Graco Standard Warranty Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from defects in material and workmanship on the date of sale to the original purchaser for use. With the exception of any special, extended, or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by Graco to be defective.