Manual de instrucciones de Graco Inc. GX-7A

Manual de instrucciones del aparato Graco Inc. GX-7A

Aparato: Graco Inc. GX-7A
Categoría: Pistola para pintar
Fabricante: Graco Inc.
Tamaño: 3.46 MB
Fecha de añadido: 11/30/2014
Número de páginas: 50
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Resúmenes de contenidos
Resumen del contenido incluido en la página 1


Operation, Parts, Service, Repair
GX-7A, GX-7 DI, and GX-7 400
311321H
Spray Guns
ENG
For use with non-flammable polyurethane foams, two-component coating systems
(polyureas), and some two-component epoxy systems. For professional use only.
Not for use in explosive atmospheres.
See page 2 for model information.
3500 psi (24 MPa, 240 bar) Maximum Working Pressure
Important Safety Instructions
Read all warnings and instructions
in this manual. Save these instructions.
GX-7 400
GX-7A
GX-7 DI

Resumen del contenido incluido en la página 2

Models Contents Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Service Screen Screw . . . . . . . . . . . . . . . . . . . . 22 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Remove Centerline Components . . . . . . . . . . . 22 Overall View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Install Centerline Components . . . . . . . . .

Resumen del contenido incluido en la página 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. WARNING PERSONAL PROTECTIVE EQUIPMENT You must wear appropriate protectiv

Resumen del contenido incluido en la página 4

Warnings WARNING 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). � Keep work area free of debris, including solvent, rags and gasoline. � Do not plug or unplug power cords, or turn power or light switches on

Resumen del contenido incluido en la página 5

Warnings WARNING PRESSURIZED ALUMINUM PARTS HAZARD Do not use 1,1,1-trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or fluids containing such solvents in pressurized aluminum equipment. Such use can cause serious chemical reaction and equipment rupture, and result in death, serious injury, and prop- erty damage. 311321H 5

Resumen del contenido incluido en la página 6

Overall View Overall View Model GX-7A Forward Stop Locknut Valving Rod Rear Stop Air Cap Adjustment Valve Gun Block Valving Rod Forward Stop Rear Packing Nut Manual Valves Trigger FIG. 1: GX-7A Overall View Model GX-7 DI FIG. 2: GX-7 DI Overall View 6 311321H

Resumen del contenido incluido en la página 7

Overall View Forward Stop Model GX-7 400 Locknut Valving Rod Rear Stop Gun Block Air Cap Valve Valving Rod Forward Stop Trigger Rear Packing Nut FIG. 3: GX-7 400 Overall View 311321H 7

Resumen del contenido incluido en la página 8

Overall View Centerline Components A-Screen Screw Model GX-7A Valving Rod Check Valve Rear Packing Screen Gun Block Screw Packing Nut Seal Screen Rear Packing Retainer Mixing Module PCD Body Screen O-ring Screen Air Cap Screw Seal Front Packing Check Valve Assembly Pattern Control Coupling Block Disc (PCD) R-Screen Screw Gasket PCD Retainer FIG. 4: GX-7A Centerline Components R-Screen Screw Model GX-7 DI Rear Seal Gland Screen Rear Packing Rear Seal Retainer Gun Block Assembly Check Valve Mixin

Resumen del contenido incluido en la página 9

Overall View Model GX-7 400 R-Screen Screw Spring Rear Packing Rear Packing Retainer Valving Rod Screen Screw Seal Rear Seal Retainer Check Valve Check Valve Mixing Module Screen Pattern Control Disc (PCD) Gun Block PCD Retainer Air Cap Screen Screw Seal Coupling Block Gasket A-Screen Screw Coupling Block Mounting Screw FIG. 6: GX-7 400 Centerline Components 311321H 9

Resumen del contenido incluido en la página 10

Overall View . Mixing Module All gun models employ the concept of impinge- ment mixing through the use of a single-part MIXING MODULE. This system is cleaned by a mechanical self-cleaning process, eliminat- Valving Rod ing the need for solvent or air purging between dispenses. Mixing Module (round or flat) The gun can be assembled with two styles of mixing components; their selection is depen- PCD (round or flat) dent upon the type of system sprayed. The Set-Up Charts on pages 44 and 46 sh

Resumen del contenido incluido en la página 11

Operation Basics Operation Basics Grounding To prevent accidental gun operation, always disconnect air supply before servicing gun or anytime gun is not in use. Check your local electrical code and propor- tioner manual for detailed grounding instruc- Isocyanate Hazard tions. Ground the spray gun through connection to a Graco-approved grounded fluid supply hose. Spraying materials containing isocyanates creates potentially harmful mists, vapors, Safety Position and atomized particulates. Th

Resumen del contenido incluido en la página 12

Operation Basics Disengage Safety Stop Air Hose Connection To disengage safety stop, push in and turn safety stop counterclockwise to place gun in Connect Air Hoses OPEN position (red band is exposed). Pull back sleeve of female fitting, insert male fitting and slide sleeve forward to secure con- Red Band nection. Disconnect Air Hoses Pull back sleeve of female fitting and pull out male fitting. OPEN Pull Sleeve Red band exposed when spraying. FIG. 11: Safety Stop - Open Close Manual Valves

Resumen del contenido incluido en la página 13

Operation Basics Close Manual Valves Coupling Block Use 5/16 in. nut driver to turn manual valve Chemical hoses are joined to gun block by fully clockwise. coupling block to ease installation and removal of gun. CAUTION To prevent accidental gun operation, always Manual Valves set safety stop to CLOSED (SERVICE), close both manual valves, and disconnect air Two manual valves located on coupling block supply. control flow of each chemical component to gun. Installation and Removal Trigge

Resumen del contenido incluido en la página 14

Operation Basics 3. Insert coupling block mounting screw and Optional Configuration use 5/16 in. nut driver to tighten to gun Refer to page 42. If bottom-mount hose con- block. nection is desired, alternate swivel fitting (2 and 3) with pipe plugs (1). Use pipe thread sealant. Do not cross-over which side each fit- ting is on. Air Inlet Configuration Coupling Block There are two configurations for the air inlet. In Gaskets the standard configuration the air inlet is at the base of the handl

Resumen del contenido incluido en la página 15

Operation Basics f. Use wrench to loosen piston locknut. Mixing Module and PCD Turn valving rod rearward as far as it will Installation turn. 1. Install mixing module: g. Place and orient PCD over mixing mod- a. Disconnect gun from coupling block. ule retainer. b. Connect air supply to gun. h. Install PCD retainer and hand tighten (GX-7 DI model only). c. Set safety stop to OPEN. i. Install PCD retainer and wrench tighten d. Hold down trigger and place module (GX-7 model only). over tip of

Resumen del contenido incluido en la página 16

Operation Basics Valving Rod Adjustment GX-7A and GX-7 400 Models Only 1. Push in rear stop to SERVICE position. 2. If attached, turn both manual valves fully clockwise to close (see Manual Valves, page 13). 3. Connect air line from gun to air source to pressurize air cylinder forward to CLOSED FIG. 18: One Wrench Flat position. 4. Loosen forward stop locknut. Valving Rod Adjustment GX-7 DI Model Only Valving rod requires adjustment in only the fol- Forward Stop lowing instances: Locknut �

Resumen del contenido incluido en la página 17

Operation Basics Initial Set Up 5. Bleed air from chemical hoses. a. Use separate waste containers for A-ISO and R-Resin. 1. Install female quick disconnect fitting to air supply hose bundled with chemical supply b. Hold coupling block with exit ports hoses. pointed into waste container. 2. Connect coupling block to hose bundle. c. Open one manual valve at a time to dis- Connect A-Isocyanate hose (red-tape) to notched fitting on coupling block. Connect pense into waste container. R-Resin

Resumen del contenido incluido en la página 18

Operation Basics Daily Start-up Daily Shutdown Ensure gun is attached to coupling block and air hose. Ensure proportioning unit is at Follow daily shutdown procedure when desired temperature and pressure. Properly gun is out of service for any length of time, ground equipment to avoid static sparking or for mid- or end-of-day service. See that may result in fire or explosion. Clean Spray Gun Procedure, page 20. 1. Connect air supply to gun. 1. Set safety stop to OPEN. 2. Adjust air cap a

Resumen del contenido incluido en la página 19

Pressure Relief Procedure Pressure Relief Procedure 4. Release gun trigger, set safety stop to CLOSED, and close manual valves. Relieve pressure before cleaning or repairing gun. If fluid in hose and proportioner is still under 1. Close both manual valves. pressure, follow Pressure Relief Procedure in proportioner manual To relieve pressure in hose after gun is removed, place fluid manifold over contain- ers, facing away from you. Very carefully open fluid valves. Under high pressure, flui

Resumen del contenido incluido en la página 20

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. FIG. 23: 3-Gallon Gun Service Kit For more information about the 3-Gallon Gun Service Kit, see Manual 311341. FIG. 22: 1-Quart Gun Service Kit For more information about the 1-Quart Gun Clean Spray Gun Procedure Service Kit, see Manual 311340. To avoid static sparking that may result in fire or explosion,


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