Graco TI14450a, 24C933, 24C934, 24C932, 257999 User Manual
...
Instructions - Parts
EP
™
Gun
313872B
Plural Component, Impingement Mix, Mechanical Purge Pour Gun
™
with Throat Seal Liquid
For use with non-flammable foam. Not for use in explosive atmospheres.
Model 257999, 24C932, 24C933, 24C934
3000 psi (20.7 MPa, 207 bar) Maximum Fluid Working Pressure
80-100 psi (0.55-0.69 MPa, 5.5-6.9 bar) Air Inlet Pressure Range
180°F (82°C) Maximum Fluid Temperature
Important Safety Instructions
Read all warnings and instructions in this
manual. Save these instructions.
Technology
ENG
US Patent Pending
TI14450a
Contents
RelatedManuals ...........................3
Models ...................................4
Orifice Flow Area Ratio Chart ............... 4
Fixed Orifice Flowrate Data .................5
Variable Orifice Flowrate Data .............. 6
Warnings .................................9
Important Two-Component Material Information 11
Isocyanate Conditions .................... 11
Material Self-ignition ..................... 11
Keep Components A and B Separate ........11
Moisture Sensitivity of Isocyanates ..........11
Foam Resins with 245 fa Blowing Agents .....11
Changing Materials ...................... 12
A (Red) and B (Blue) Components ..........12
Throat Seal Liquid .........................13
Grounding ...............................13
PistonSafetyLock ........................13
TriggerLock..............................13
Loss of Air Pressure .......................14
Hook Support .............................14
Component Identification ...................16
CutawayView ..........................17
Theory of Operation .......................18
Gun Triggered (Fluid Pouring) .............18
Gun Detriggered ........................ 18
Setup....................................19
AdjustOrifices..........................20
Optional Hose Position ...................21
Pressure Relief Procedure ..................22
Shutdown ................................23
Short Term Shutdown ....................23
Long Term Shutdown .................... 23
Maintenance ..............................24
Supplied Tool Kit ........................ 24
Lubrication ............................24
Bleed Throat Seal Liquid Cartridge .......... 24
FlushGun .............................25
CleanOutsideofGun ....................25
CleanBreatherPlug ..................... 26
Clean Fluid Manifold ..................... 26
Clean Check Valves ..................... 27
Clean Fluid Housing Passages .............28
Clean Orifice ...........................29
Replace Mix Chamber and Front Seal .......30
Repair ...................................31
Tools Required .........................31
Lubrication .............................31
Replace Throat Seal Liquid Cartridge .......31
Remove Front End ......................33
Disassemble Front End ...................34
Assemble Front End .....................34
AttachFrontEnd ........................35
Pistons and Bulkhead ....................35
PurgeRod .............................37
Solenoid Valve ..........................38
Troubleshooting ...........................39
ElectricalDiagram .......................41
Parts ....................................42
Kits .....................................45
Orifice Kits .............................50
DrillBitKits ............................51
Complete O-ring Placement Guide ..........52
Accessories ..............................53
Lubricant for Gun Rebuild .................53
Throat Seal Liquid Cartridges
FluidInletCover ........................53
Gun Cleaning Kit ........................53
Flushing Manifold .......................53
15B817 Manifold Block ...................53
Circulation Manifold ......................53
Reactor IP Harness ......................53
Solvent Flush Canister Kit .................54
SolventFlushPailKit.....................54
TechnicalData ............................55
Dimensions ............................56
Graco Standard Warranty ...................58
GracoInformation .........................58
..............53
2 313872B
Related Manuals
Manuals are available at www.graco.com.
Component manuals in U.S. English:
Power-LockTMHeated Hose
Part Description
309572 Instructions - Parts
Solvent Flush Kits
Part Description
309963 Instructions - Parts
Circulation Manifold Kit
Part Description
309818 Instructions - Parts
Heated Hoses and Applicator Kits
Related Manuals
Part Description
3A0237 Instructions - Parts
313872B 3
Models
Models
Purge Rod
Diameter
Part
257999 0.250 (6.35) 0.031 (0.79) Handheld
24C932 0.250 (6.35) 0.031 (0.79) Auto
24C933 0.375 (9.53) 0.047 (1.2) Handheld
24C934 0.375 (9.53) 0.047 (1.2) Auto
in. (mm)
Orifice Flow Area Ratio Chart
In general, flow area ratio should be equal to material ratio but will be influenced by material viscosity. The ideal flow
area ratio is dependent on flow rates, material viscosity, and material ratio. Choose the correct size orifices to equalize fluid pressures at the proportioner.
Orifice Size
in. (mm) Handle Type
Available Orifice Flow Area Ratios
Dia-
meter 0.016 0.020 0.024 0.028 0.031 0.035 0.039 0.042 0.047 0.052 0.055 0.060 0.063 0.067 0.073 0.086
0.016 1.0 1.6 2.3 3.1 3.8 4.8 5.9 6.9 8.6 10.6 11.8 14.1 15.5 17.5 20.8 28.9
0.020 1.6 1.0 1.4 2.0 2.4 3.1 3.8 4.4 5.5 6.8 7.6 9.0 9.9 11.2 13.3 18.5
0.024 2.3 1.4 1.0 1.4 1.7 2.1 2.6 3.1 3.8 4.7 5.3 6.3 6.9 7.8 9.3 12.8
0.028 3.1 2.0 1.4 1.0 1.2 1.6 1.9 2.3 2.8 3.4 3.9 4.6 5.1 5.7 6.8 9.4
0.031 3.8 2.4 1.7 1.2 1.0 1.3 1.6 1.8 2.3 2.8 3.1 3.7 4.1 4.7 5.5 7.7
0.035 4.8 3.1 2.1 1.6 1.3 1.0 1.2 1.4 1.8 2.2 2.5 2.9 3.2 3.7 4.4 6.0
0.039 5.9 3.8 2.6 1.9 1.6 1.2 1.0 1.2 1.5 1.8 2.0 2.4 2.6 3.0 3.5 4.9
0.042 6.9 4.4 3.1 2.3 1.8 1.4 1.2 1.0 1.3 1.5 1.7 2.0 2.3 2.5 3.0 4.2
0.047 8.6 5.5 3.8 2.8 2.3 1.8 1.5 1.3 1.0 1.2 1.4 1.6 1.8 2.0 2.4 3.3
0.052 10.6 6.8 4.7 3.4 2.8 2.2 1.8 1.5 1.2 1.0 1.1 1.3 1.5 1.7 2.0 2.7
0.055 11.8 7.6 5.3 3.9 3.1 2.5 2.0 1.7 1.4 1.1 1.0 1.2 1.3 1.5 1.8 2.4
0.060 14.1 9.0 6.3 4.6 3.7 2.9 2.4 2.0 1.6 1.3 1.2 1.0 1.1 1.2 1.5 2.1
0.063 15.5 9.9 6.9 5.1 4.1 3.2 2.6 2.3 1.8 1.5 1.3 1.1 1.0 1.1 1.3 1.9
0.067 17.5 11.2 7.8 5.7 4.7 3.7 3.0 2.5 2.0 1.7 1.5 1.2 1.1 1.0 1.2 1.6
0.073 20.8 13.3 9.3 6.8 5.5 4.4 3.5 3.0 2.4 2.0 1.8 1.5 1.3 1.2 1.0 1.4
0.086 28.9 18.5 12.8 9.4 7.7 6.0 4.9 4.2 3.3 2.7 2.4 2.1 1.9 1.6 1.4 1.0
Flowrate Increases as Diameter Increases =>
Flowrate Increases as Diameter Increases=>
4 313872B
Fixed Orifice Flowrate Data
Models
5.00
4.75
4.50
4.25
4.00
3.75
3.50
3.25
3.00
2.75
2.50
2.25
Flow (gpm)
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0.00
500 750 1000 1250 1500 1750 2000
EP Fixed Orifice Flow Data
0.086 in. Diameter Orifice
0.067 in. Diameter Orifice
0.060 in. Diameter Orifice
0.047 in. Diameter Orifice
0.031 in. Diameter Orifice
0.020 in. Diameter Orifice
Pressure (psi)
313872B 5
Models
Variable Orifice Flowrate Data
VARIABLE ORIFICE FLOWRATE DATA (1000 PSI)
0.086
0.073
0.067
0.063
0.060
0.055
0.052
0.047
0.041
0.039
0.033
0.031
ORIFICE DIAMETER (in.)
0.028
0.024
0.020
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.75
* To calculate flow in lb/min, multiply gpm rate by 10.
Example: 2 gpm x 10 = 20 lb/min.
FLOWRATE (gpm)
6 313872B
VARIABLE ORIFICE FLOWRATE DATA (1500 PSI)
0.086
0.073
0.067
0.063
0.060
0.055
0.052
0.047
0.041
0.039
0.033
0.031
ORIFICE DIAMETER (in.)
0.028
0.024
0.020
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.75
Models
FLOWRATE (gpm)
* To calculate flow in lb/min, multiply gpm rate by 10.
Example: 2 gpm x 10 = 20 lb/min.
313872B 7
Models
ORIFICE DIAMETER (in.)
VARIABLE ORIFICE FLOWRATE DATA (2000 PSI)
0.086
0.073
0.067
0.063
0.060
0.055
0.052
0.047
0.041
0.039
0.033
0.031
0.028
0.024
0.020
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.75
FLOWRATE (gpm)
* To calculate flow in lb/min, multiply gpm rate by 10.
Example: 2 gpm x 10 = 20 lb/min.
8 313872B
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 symbol refers to procedure-specific risk. Refer back
to these warnings. Additional, product-specific warnings may be found throughout the body of this manual where
applicable.
WARNING
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 MSDSs to know the specific hazards of the fluids you are using.
• Store hazardous fluid in approved containers, and dispose of it according to applicable guidelines.
• Always wear chemically impermeable gloves when spraying, dispensing, or cleaning equipment.
PERSONAL PROTECTIVE EQUIPMENT
You must wear appropriate protective equipment when operating, servicing, or when in the operating
area of the equipment to help protect you from serious injury, including eye injury, hearing loss, inhalation of toxic fumes, and burns. This equipment includes but is not limited to:
• Protective eyewear, and hearing protection.
• Respirators, protective clothing, and gloves as recommended by the fluid and solvent manufac-
turer.
SKIN INJECTION HAZARD
High-pressure fluid from dispensing device, 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.
• Engage trigger lock when not dispensing.
• Do not point dispensing device at anyone or at any part of the body.
• Do not put your hand over the fluid outlet.
• Do not stop or deflect leaks with your hand, body, glove, or rag.
• Follow the Pressure Relief Procedure when you stop dispensing 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
BURN HAZARD
Equipment surfaces and fluid that’s heated can become very hot during operation. To avoid severe
burns:
• Do not touch hot fluid or equipment.
313872B 9
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 or off when flammable fumes
are present.
• Ground all equipment in the work area. See Grounding instructions.
• Use only grounded hoses.
• Hold gun firmly to side of grounded pail when triggering into pail.
• If there is static sparking or you feel a shock, stop operation immediately. 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 Technical Data in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical Data in all
equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete information
about your material, request MSDS from distributor or retailer.
• Do not leave the work area while equipment is energized or under pressure. Turn off all equipment
and follow the Pressure Relief Procedure 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.
• 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.
PRESSURIZED ALUMINUM PARTS HAZARD
Use of fluids that are incompatible with aluminum in pressurized equipment can cause serious chemical reaction and equipment rupture. Failure to follow this warning can result in death, serious injury, or
property damage.
• Do not use 1,1,1-trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or
fluids containing such solvents.
• Many other fluids may contain chemicals that can react with aluminum. Contact your material supplier for compatibility.
10 313872B
Important Two-Component Material Information
Important Two-Component Material Information
Isocyanate Conditions
Spraying or dispensing 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.
Prevent inhalation of isocyanate mists, vapors, and
atomized particulates by providing sufficient ventilation in the work area. If sufficient ventilation is not
available, a supplied-air respirator is required for
everyone in the work area.
To prevent contact with isocyanates, appropriate personal protective equipment, including chemically
impermeable gloves, boots, aprons, and goggles, is
also required for everyone in the work area.
Material Self-ignition
Some materials may become self-igniting if applied
too thickly. Read material manufacturer’s warnings
and material MSDS.
Keep Components A and B
Moisture Sensitivity of Isocyanates
Isocyanates (ISO) are catalysts used in two component
foam and polyurea coatings. ISO will react with moisture
(such as humidity) to form small, hard, abrasive crystals,
which become suspended in the fluid. Eventually a film
will form on the surface and the ISO will begin to gel,
increasing in viscosity. If used, this partially cured ISO
will reduce performance and the life of all wetted parts.
NOTE: The amount of film formation and rate of crystallization varies depending on the blend of ISO, the
humidity, and the temperature.
To prevent exposing ISO to moisture:
• 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 lube pump reservoir (if installed) filled
with Graco Throat Seal Liquid™(TSL™), Part
206995. The lubricant creates a barrier between the
ISO and the atmosphere.
• Use moisture-proof hoses specifically designed for
ISO, such as those supplied with your system.
• Never use reclaimed solvents, which may contain
moisture. Always keep solvent containers closed
when not in use.
• Never use solvent on one side if it has been contaminated from the other side.
• Always lubricate threaded parts with ISO pump oil
or grease when reassembling.
Separate
Foam Resins with 245 fa Blowing Agents
Some foam blowing agents will froth at temperatures
above 90°F (33°C) when not under pressure, especially
Cross-contamination can result in cured material in
fluid lines which could cause serious injury or damage equipment. To prevent cross-contamination of
the equipment’s wetted parts, never interchange
component A (isocyanate) and component B (resin)
parts.
313872B 11
if agitated. To reduce frothing, minimize preheating in a
circulation system.
Important Two-Component Material Information
Changing Materials
• 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.
• Most materials use ISO on the A side, but some use
ISOontheBside.
• Epoxies often have amines on the B (hardener)
side. Polyureas often have amines on the B (resin)
side.
A (Red) and B (Blue) Components
IMPORTANT!
Material suppliers can vary in how they refer to plural
component materials.
Be aware that when standing in front of the manifold on
proportioner:
• Component A (Red) is on the left side. The A (Red)
side is intended for ISO, hardeners, and catalysts.
• Component B (Blue) is on the right side.The B
(Blue) side is intended for polyols, resins, and
bases.
For ratios higher than 1:1, the higher volume is typically
the B (Blue) side.
• Most polyurethanes use ISO on the A (Red) side
and polyol on the B (blue side, but some use ISO on
the B (Blue) side.
• Epoxies often have amines on the B (hardener) side
• Polyureas often have amines on the B (resin) side.
• Silicones often have the catalyst on the B side.
12 313872B
Throat Seal Liquid
Throat Seal Liquid
Read material MSDS to know specific hazards and
precautions related to Throat Seal Liquid.
Grounding
Check your local electrical code and proportioner manual for detailed grounding instructions.
Ground the pour gun through connection to a
Graco-approved grounded fluid supply hose. Always
ground the gun when flushing.
Disengage
To disengage piston safety lock, push knob in and turn
counterclockwise until it pops out. There will be a gap
between knob and gun body.
TI14473b TI14474a
FIG. 2: Piston Safety Lock Disengaged
Trigger Lock
Engage trigger lock whenever you stop pouring to avoid
accidental triggering. Must be used with piston safety
lock.
Piston Safety Lock
Engage piston safety lock whenever you stop pouring to
avoid accidental triggering and serious injury.
Engage
To engage piston safety lock, push knob in and turn
clockwise. If engaged, gun will not dispense.
TI14454b TI14475a
FIG. 1: Piston Safety Lock Engaged
Engage
TI10442a
Disengage
TI10441a
313872B 13
Loss of Air Pressure
Loss of Air Pressure
Purge rod actuation is controlled by air pressure. In
event of loss of air pressure, the purge rod will remain
retracted, the impingement ports will remain open, and
the gun will continue to pour. To stop pouring, do one of
the following:
• Engage piston safety lock, see Piston Safety Lock
section
• Close fluid valves A and B, see FIG.3
Hook Support
If necessary, use the hook support located on the top of
the gun to support the weight of the gun. Connect a
strong rope or chain able to support the weight of the
gun to the hook, then connect the other end to a support. This will enable the user to use the gun without
having to support the weight of the gun.
TI14450a1
FIG.3
TI14457a
14 313872B
Hook Support
313872B 15
Component Identification
Component Identification
See Parts on page 42 for part numbers and further
component identification.
K
H
E
B
A
M
H
C
J
N
D
P
R
FIG.4
Key:
A Hook Support
B Fluid Housing
C Orifice
D Fluid Manifold
E Air Cylinder, Gun Body
F Mounting Plate
G Electric Trigger Handle (optional)
L
F
G
TI14451a
H Dual Pistons
J Bulkhead
K Piston Safety Lock
L Throat Seal Liquid Cartridge
M Airline Fitting
N Solenoid Valve Gasket
P Solenoid Valve Mounting Plate
R Solenoid Valve
16 313872B
Cutaway View
B
E
Component Identification
H
J
H
A
K
D
R
C
G
TI14462a
313872B 17
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
Gun Detriggered
Purge rod extends, closing the impingement ports and
stopping fluid flow. Throat Seal Liquid lubricates the
purge rod.
Purge Rod
Side View
Throat Seal Liquid
TI14477a
Top View
18 313872B
TI14485a
Top View
TI14486a
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