Graco 313872n User Manual

Instructions - Parts

EP

™

Gun

313872N

Plural Component, Impingement Mix, Mechanical Purge Pour Gun

For use with non-flammable foam in open pour applications. Not approved for use in
European explosive atmosphere locations.

Model 257999, 24C932

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.

EN

ti19547a

Contents

Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . 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

Piston Safety Lock . . . . . . . . . . . . . . . . . . . . . . . . 13

Trigger Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Loss of Air Pressure . . . . . . . . . . . . . . . . . . . . . . . 14

Hook Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Component Identification . . . . . . . . . . . . . . . . . . . 16

Cutaway View . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . 18

Gun Triggered (Fluid Pouring) . . . . . . . . . . . . . . 18

Gun Detriggered . . . . . . . . . . . . . . . . . . . . . . . . 18

Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Adjust Orifices . . . . . . . . . . . . . . . . . . . . . . . . . . 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

Grease the Gun . . . . . . . . . . . . . . . . . . . . . . . . 24

Flush Gun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Clean Outside of Gun . . . . . . . . . . . . . . . . . . . . 26

Clean Breather Plug . . . . . . . . . . . . . . . . . . . . . 26

Clean Fluid Manifold . . . . . . . . . . . . . . . . . . . . . 26

Clean Check Valves . . . . . . . . . . . . . . . . . . . . . 27

Clean Fluid Housing Passages . . . . . . . . . . . . . 28

Clean Orifice . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Replace Mix Chamber and Front Seal . . . . . . . 29

Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Replace Cartridge . . . . . . . . . . . . . . . . . . . . . . 30

Remove Front End . . . . . . . . . . . . . . . . . . . . . . . 31

Disassemble Front End . . . . . . . . . . . . . . . . . . . 32

Assemble Front End . . . . . . . . . . . . . . . . . . . . . 32

Attach Front End . . . . . . . . . . . . . . . . . . . . . . . . 33

Pistons and Bulkhead . . . . . . . . . . . . . . . . . . . . 34

Purge Rod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Solenoid Valve . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Electrical Diagram . . . . . . . . . . . . . . . . . . . . . . . 39

Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Series A and B Kits . . . . . . . . . . . . . . . . . . . . . . 43

All Series Kits . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Series C Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Orifice Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Drill Bit Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Complete O-ring Placement Guide . . . . . . . . . . 52

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Lubricant for Gun Rebuild . . . . . . . . . . . . . . . . . 53

Fluid Inlet Cover . . . . . . . . . . . . . . . . . . . . . . . . 53

Gun Cleaning Kit . . . . . . . . . . . . . . . . . . . . . . . . 53

Flushing Manifold . . . . . . . . . . . . . . . . . . . . . . . 53

15B817 Manifold Block . . . . . . . . . . . . . . . . . . . 53

Circulation Manifold . . . . . . . . . . . . . . . . . . . . . . 53

Reactor

Signal Cable Extensions . . . . . . . . . . . . . . . . . . 53

Solvent Flush Canister Kit . . . . . . . . . . . . . . . . . 54

Solvent Flush Pail Kit . . . . . . . . . . . . . . . . . . . . . 54

Grease Cartridge for Gun Shutdown . . . . . . . . . 54

Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 58

®

IP Harness . . . . . . . . . . . . . . . . . . . . . 53

2 313872N

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313872N 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

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.

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

0.024 2.3 1.4

0.028 3.1

0.031 3.8 2.4 1.7 1.2

0.035 4.8 3.1 2.1 1.6 1.3

0.039 5.9 3.8 2.6 1.9 1.6 1.2

0.042 6.9 4.4 3.1 2.3 1.8 1.4 1.2

0.047 8.6 5.5 3.8 2.8 2.3 1.8 1.5 1.3

0.052 10.6 6.8 4.7 3.4 2.8 2.2 1.8 1.5 1.2

0.055 11.8 7.6 5.3 3.9 3.1 2.5

0.060 14.1 9.0 6.3 4.6 3.7 2.9 2.4

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

0.067 17.5 11.2 7.8 5.7 4.7 3.7

0.073 20.8 13.3 9.3 6.8 5.5 4.4 3.5

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 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

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

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

Orifice Size

in. (mm) Handle Type

Available Orifice Flow Area Ratios

1.0 1.3 1.6 1.8 2.3 2.8 3.1 3.7 4.1 4.7 5.5 7.7

1.0 1.2 1.4 1.8 2.2 2.5 2.9 3.2 3.7 4.4 6.0

1.01.21.51.82.0 2.4 2.6 3.0 3.5 4.9

1.0 1.3 1.5 1.7 2.0 2.3 2.5 3.0 4.2

1.0 1.2 1.4 1.6 1.8 2.0 2.4 3.3

1.0 1.1 1.3 1.5 1.7 2.0 2.7

2.01.71.41.11.0 1.2 1.3 1.5 1.8 2.4

2.0 1.6 1.3 1.2 1.01.11.21.52.1

1.0 1.1 1.3 1.9

3.0 2.5 2.0 1.7 1.5 1.2 1.1 1.0 1.2 1.6

3.0 2.4 2.0 1.8 1.5 1.3 1.2 1.0 1.4

1.0

Flowrate Increases as Diameter Increases =>

Flowrate Increases as Diameter Increases=>

4 313872N

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)

EP Gun Flowrate Data, Tested with 2 lb Foam

350 (5.53)

300 (4.74)

250 (3.95)

200 (3.16)

150 (2.37)

Flow

cc / sec, (gpm)

100 (1.58)

50 (0.79)

Orifice

0.086 in. diameter

0.067 in. diameter

0.060 in. diameter

0.047 in. diameter

0.031 in. diameter

0

500 15000

HFR with 160/160 and EP250

1000 2000 2500 3000

Pressure (psig)

313872N 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 313872N

Models

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

FLOWRATE (gpm)

* To calculate flow in lb/min, multiply gpm rate by 10.
Example: 2 gpm x 10 = 20 lb/min.

313872N 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 313872N

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.

313872N 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 313872N

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

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.

™

(TSL™), Part

Separate

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.

313872N 11

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
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
ISO on the B side.

• 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 313872N

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

Trigg er 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

313872N 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 F

IG. 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

ti19549a

14 313872N

Hook Support

313872N 15

Component Identification

Component Identification

See Parts on page 40 for part numbers and further
component identification.

K

H

E

B

A

M

H

C

J

N

D

P

R

L

FIG. 4

Key:

A Hook Support
B Fluid Housing
COrifice
D Fluid Manifold
E Air Cylinder, Gun Body
F Mounting Plate
G Electric Trigger Handle (optional)

F

G

ti19550a

H Dual Pistons
J Bulkhead
K Piston Safety Lock
L Cartridge
M Airline Fitting
N Solenoid Valve Gasket
P Solenoid Valve Mounting Plate
R Solenoid Valve

16 313872N

Cutaway View

Component Identification

H

J

H

C

D

B

E

A

K

R

G

ti19551a

313872N 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.

Purge Rod

Grease

Side View

ti19552a

Gun Detriggered

Purge rod extends, closing the impingement ports and
stopping fluid flow.

Purge Rod

Side View

Grease

ti19553a

Top View

18 313872N

ti19554a

Top View

ti19555a