Graco 311320L, Spray Gun Instruction Manual
Instructions
Model D Spray Gun
For use with non-flammable polyurethane foams. For professional use only.
1000 psi (7 MPa, 70 bar) Maximum Working Pressure
Important Safety Instructions
Read all warnings and instructions in this
manual before using the equipment.
Save these instructions.
311320L
EN
Related Manuals
Contents
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Important Isocyanate (ISO) Information . . . . . . . . . 6
Isocyanate Conditions . . . . . . . . . . . . . . . . . . . . . 6
Material Self-Ignition . . . . . . . . . . . . . . . . . . . . . . 7
Keep Components A and B Separate . . . . . . . . . 7
Moisture Sensitivity of Isocyanates . . . . . . . . . . . 7
Foam Resins with 245 fa Blowing Agents . . . . . . 7
Changing Materials . . . . . . . . . . . . . . . . . . . . . . . 7
Component Identification . . . . . . . . . . . . . . . . . . . . 8
Model D Spray Gun . . . . . . . . . . . . . . . . . . . . . . . 8
Fluid Head Components . . . . . . . . . . . . . . . . . . . 9
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Coupling Block . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Air Hose Connection . . . . . . . . . . . . . . . . . . . . . 11
Valving Rod Adjustment Screw . . . . . . . . . . . . . 11
Air Cap Adjustment Valve . . . . . . . . . . . . . . . . . 11
Felt Wiper. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Initial Set Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Daily Start-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Daily Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . 13
Pressure Relief Procedure. . . . . . . . . . . . . . . . . 13
Spray Pattern Adjustment . . . . . . . . . . . . . . . . . . . 14
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Gun Service Kits. . . . . . . . . . . . . . . . . . . . . . . . . 16
Clean Spray Gun . . . . . . . . . . . . . . . . . . . . . . . . 16
Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Remove and Service Filter Screen. . . . . . . . . . . 17
Clean Injection Slots. . . . . . . . . . . . . . . . . . . . . . 17
Adjust Valving Rod . . . . . . . . . . . . . . . . . . . . . . . 18
Remove Fluid Head Component . . . . . . . . . . . . 19
Install Fluid Head Component . . . . . . . . . . . . . . 21
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Model D Spray Gun Assembly . . . . . . . . . . . . . . 22
Air Cylinder Assembly . . . . . . . . . . . . . . . . . . . . 25
Coupling Block Assembly . . . . . . . . . . . . . . . . . . 26
Technical Specifications . . . . . . . . . . . . . . . . . . . . 27
California Proposition 65 . . . . . . . . . . . . . . . . . . . . 27
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 28
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295530
295532
295533
D-55
D-62
D-70
296597
296598
296599
2 311320L
Warnings
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The
exclamation point symbol alerts you to a general warning and the hazard symbols refer to procedure-specific risks.
When these symbols appear in the body of this manual or on warning labels, refer back to these Warnings.
Product-specific hazard symbols and warnings not covered in this section may appear throughout the body of this
manual where applicable.
WARNING
PERSONAL PROTECTIVE EQUIPMENT
Always wear appropriate personal protective equipment and cover all skin when spraying, servicing
equipment, or when in the work area. Protective equipment helps prevent serious injury, including
long-term exposure; inhalation of toxic fumes, mists or vapors; allergic reaction; burns; eye injury and
hearing loss. This protective equipment includes but is not limited to:
• A properly fitting respirator, which may include a supplied-air respirator, chemically impermeable
gloves, protective clothing and foot coverings as recommended by the fluid manufacturer and local
regulatory authority.
• Protective eyewear and hearing protection.
TOXIC FLUID OR FUMES HAZARD
Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin, inhaled or
swallowed.
• Read Safety Data Sheets (SDSs) for handling instructions and to know the specific hazards of the
fluids you are using, including the effects of long-term exposure.
• When spraying, servicing equipment, or when in the work area, always keep work area
well-ventilated and always wear appropriate personal protective equipment. See Personal
Protective Equipment warnings in this manual.
• Store hazardous fluid in approved containers, and dispose of it according to applicable guidelines.
SKIN INJECTION HAZARD
High-pressure fluid from gun, hose leaks, or ruptured components will pierce skin. This may look like
just a cut, but it is a serious injury that can result in amputation. Get immediate surgical treatment.
• Do not point gun at anyone or at any part of the body.
• Do not put your hand over the spray tip.
• Do not stop or deflect leaks with your hand, body, glove, or rag.
• Follow the Spray Pattern Adjustment when you stop spraying and before cleaning, checking, or
servicing equipment.
• Tighten all fluid connections before operating the equipment.
• Check hoses and couplings daily. Replace worn or damaged parts immediately.
311320L 3
Warnings
WARNING
FIRE AND EXPLOSION HAZARD
Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. Paint or
solvent flowing through the equipment can cause static sparking. 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 sparking).
• Ground all equipment in the work area. See Grounding instructions.
• Never spray or flush solvent at high pressure.
• 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 or off when flammable fumes
are present.
• Use only grounded hoses.
• Hold gun firmly to side of grounded pail when triggering into pail. Do not use pail liners unless they
are anti-static or conductive.
• Stop operation immediately if static sparking occurs or you feel a shock. Do not use equipment until
you identify and correct the problem.
• Keep a working fire extinguisher in the work area.
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
• Do not operate the unit when fatigued or under the influence of drugs or alcohol.
• Do not exceed the maximum working pressure or temperature rating of the lowest rated system
component. See in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See in all equipment
manuals. Read fluid and solvent manufacturer’s warnings. For complete information about your
material, request Safety Data Sheets (SDSs) from distributor or retailer.
• Turn off all equipment and follow the Spray Pattern Adjustment when equipment is not in use.
• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine
manufacturer’s replacement parts only.
• Do not alter or modify equipment. Alterations or modifications may void agency approvals and create
safety hazards.
• Make sure all equipment is rated and approved for the environment in which you are using it.
• Use equipment only for its intended purpose. Call your distributor for information.
• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.
• Do not kink or over bend hoses or use hoses to pull equipment.
• Keep children and animals away from work area.
• Comply with all applicable safety regulations.
4 311320L
Warnings
WARNING
PRESSURIZED EQUIPMENT HAZARD
Fluid from the equipment, leaks, or ruptured components can splash in the eyes or on skin and cause
serious injury.
• Follow the Spray Pattern Adjustment when you stop spraying/dispensing and before cleaning,
checking, or servicing equipment.
• Tighten all fluid connections before operating the equipment.
• Check hoses, tubes, and couplings daily. Replace worn or damaged parts immediately.
BURN HAZARD
Equipment surfaces and fluid that is heated can become very hot during operation. To avoid severe
burns:
• Do not touch hot fluid or equipment.
311320L 5
Important Isocyanate (ISO) Information
Important Isocyanate (ISO) Information
Isocyanates (ISO) are catalysts used in two component materials.
Isocyanate Conditions
Spraying or dispensing fluids that contain isocyanates creates potentially harmful mists, vapors, and atomized
particulates.
• Read and understand the fluid manufacturer’s warnings and Safety Data Sheets (SDSs) to know specific
hazards and precautions related to isocyanates.
• Use of isocyanates involves potentially hazardous procedures. Do not spray with this equipment unless you
are trained, qualified, and have read and understood the information in this manual and in the fluid
manufacturer’s application instructions and SDSs.
• Use of incorrectly maintained or mis-adjusted equipment may result in improperly cured material, which could
cause off gassing and offensive odors. Equipment must be carefully maintained and adjusted according to
instructions in the manual.
• To prevent inhalation of isocyanate mists, vapors and atomized particulates, everyone in the work area must
wear appropriate respiratory protection. Always wear a properly fitting respirator, which may include a
supplied-air respirator. Ventilate the work area according to instructions in the fluid manufacturer’s SDSs.
• Avoid all skin contact with isocyanates. Everyone in the work area must wear chemically impermeable
gloves, protective clothing and foot coverings as recommended by the fluid manufacturer and local regulatory
authority. Follow all fluid manufacturer recommendations, including those regarding handling of
contaminated clothing. After spraying, wash hands and face before eating or drinking.
• Hazard from exposure to isocyanates continues after spraying. Anyone without appropriate personal
protective equipment must stay out of the work area during application and after application for the time
period specified by the fluid manufacturer. Generally this time period is at least 24 hours.
• Warn others who may enter work area of hazard from exposure to isocyanates. Follow the recommendations
of the fluid manufacturer and local regulatory authority. Posting a placard such as the following outside the
work area is recommended:
TOXIC FUMES
HAZARD
DO NOT ENTER DURING
SPRAY FOAM APPLICATION
OR FOR ___ HOURS AFTER
APPLICATION IS COMPLETE
DO NOT ENTER UNTIL:
DATE:
TIME:
6 311320L
____________
____________
Important Isocyanate (ISO) Information
Material Self-Ignition
Some materials may become self-igniting if applied
too thick. Read material manufacturer’s warnings and
Safety Data Sheets (SDSs).
Keep Components A and B Separate
Cross-contamination can result in cured material in
fluid lines which could cause serious injury or damage
equipment. To prevent cross-contamination:
• Never interchange component A and component
B wetted parts.
• Never use solvent on one side if it has been
contaminated from the other side.
NOTICE
Partially cured ISO will reduce performance and the life
of all wetted parts.
• Always use a sealed container with a desiccant
dryer in the vent, or a nitrogen atmosphere. Never
store ISO in an open container.
• Keep the ISO pump wet cup or reservoir (if
installed) filled with appropriate lubricant. The
lubricant creates a barrier between the ISO and the
atmosphere.
• Use only moisture-proof hoses compatible with
ISO.
• Never use reclaimed solvents, which may contain
moisture. Always keep solvent containers closed
when not in use.
• Always lubricate threaded parts with an appropriate
lubricant when reassembling.
NOTE: The amount of film formation and rate of
crystallization varies depending on the blend of ISO, the
humidity, and the temperature.
Foam Resins with 245 fa
Moisture Sensitivity of Isocyanates
Exposure to moisture (such as humidity) will cause ISO
to partially cure, forming small, hard, abrasive crystal
that become suspended in the fluid. Eventually a film will
form on the surface and the ISO will begin to gel,
increasing in viscosity.
Blowing Agents
Some foam blowing agents will froth at temperatures
above 90°F (33°C) when not under pressure, especially
if agitated. To reduce frothing, minimize preheating in a
circulation system.
Changing Materials
NOTICE
Changing the material types used in your equipment
requires special attention to avoid equipment damage
and downtime.
• When changing materials, flush the equipment
multiple times to ensure it is thoroughly clean.
• Always clean the fluid inlet strainers after flushing.
• Check with your material manufacturer for
chemical compatibility.
• When changing between epoxies and urethanes or
polyureas, disassemble and clean all fluid
components and change hoses. Epoxies often
have amines on the B (hardener) side. Polyureas
often have amines on the B (resin) side.
311320L 7
Component Identification
Component Identification
Model D Spray Gun
Valving Rod Closure Spring
Valving Rod Positioner
Spring Retainer Case
Valving Rod
Adjustment Screw
Valving Rod Stop Bar
Valving Rod
Gun Block
Coupling Block
Coupling Block
Mounting Screw
FIG. 1 Major Components
Piston Rod
Trigger
Air Cap Adjustment Valve
8 311320L
Fluid Head Components
Gun Block
Mounting Screw
Component Identification
Screen Screw
Valving Rod
Assembly
Felt Wiper Retainer
Gun Block
R-Resin Check Valve
Screen Mounting Screw
FIG. 2 Fluid Head Components
O-Ring
Closure
Screw
A-Iso Check Valve
Seal
Screen
Snap Ring
Mixing Chamber Case
Air Cap
Coupling Block Gaskets
311320L 9
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