Operation - Parts
S-Head
For dispensing Polyol and Isocyanate.
3000 psi (20.68 MPa, 206.8 bar) Maximum Working Pressure
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
312752C
Models
Contents
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Isocyanate Hazard . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Material Self-ignition . . . . . . . . . . . . . . . . . . . . . . . . 5
Moisture Sensitivity of Isocyanates . . . . . . . . . . . . 5
Keep Components A and B Separate . . . . . . . . . . 5
Foam Resins with 245 fa Blowing Agents . . . . . . . 5
Changing Materials . . . . . . . . . . . . . . . . . . . . . . . . . 5
Component Identification . . . . . . . . . . . . . . . . . . . 6
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Models
Maximum Working Pressure
Model Stroke (in.)
30110-500-2
30110-500-4
30110-625-2
2.25 3000 (20.68, 206.8)
4.00 3000 (20.68, 206.8)
2.25 3000 (20.68, 206.8)
psi (MPa, bar)
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Nozzle Assembly . . . . . . . . . . . . . . . . . . . . . . . . 9
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Nozzle Assembly . . . . . . . . . . . . . . . . . . . . . . . . 11
Injection Nozzle and Needle Valve Kits . . . . . . . 12
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Graco Ohio Standard Warranty . . . . . . . . . . . . . . 16
Graco Ohio Information . . . . . . . . . . . . . . . . . . . . . 16
30110-625-4
4.00 3000 (20.68, 206.8)
2 312752C
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 MSDS’s 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 impervious gloves when spraying 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, inhalation of toxic
fumes, burns, and hearing loss. This equipment includes but is not limited to:
• Protective eyewear
• Clothing and respirator as recommended by the fluid and solvent manufacturer
•Gloves
• Hearing protection
SKIN INJECTION HAZARD
High-pressure fluid from dispense valve, 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 dispense valve at anyone or at any part of the body.
• Do not put your hand over the end of the dispense nozzle.
• Do not stop or deflect leaks with your hand, body, glove, or rag.
•Follow Pressure Relief Procedure in this manual, when you stop spraying and before cleaning,
checking, or servicing equipment.
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.
312752C 3
Warnings
WARNING
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 forms from distributor or retailer.
• 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.
MOVING PARTS HAZARD
Moving parts can pinch or amputate fingers and other body parts.
• Keep clear of moving parts.
• Do not operate equipment with protective guards or covers removed.
• Pressurized equipment can start without warning. Before checking, moving, or servicing equipment,
follow the Pressure Relief Procedure in this manual. Disconnect power or air supply.
4 312752C
Isocyanate Hazard
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.
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.
• Keep the ISO lube pump reservoir 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 park pumps when you shutdown.
• Always lubricate threaded parts with ISO pump oil
or grease when reassembling.
Keep Components A and B Separate
Material Self-ignition
Some materials may become self-igniting if applied
too thickly. Read material manufacturer’s warnings
and material MSDS.
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.
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.
CAUTION
To prevent cross-contamination of the equipment’s
wetted parts, never interchange component A (isocyanate) and component B (resin) parts.
Foam Resins with 245 fa Blowing Agents
New 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
• 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.
312752C 5
Component Identification
Component Identification
LEFT
E
RIGHT
F
TOP
CD
B
A
G
G
H
F
IG. 1
Key:
A Hydraulic-open
B Hydraulic-close
C Isocyanate supply
D Iso-return
Within each nozzle assembly, there is an injection nozzle and needle valve kit (101) where the chemicals are
introduced into the mixing chamber. In the mixing chamber, the two chemicals are impinged against each other
causing the mixing of the two components.
After dispensing is finished, the valving rod is hydraulically driven forward to the “closed” position to completely remove mixed material from the mixing chamber.
There is no need for additional cleaning.
E Polyol supply
FPolyol return
GNozzle Assembly
HPour Nozzle
With the valving rod closed, the fluid circulates from the
supply lines directly to the return lines. This creates continuous circulation of conditioned material through the
MixHead and back to the tank.
6 312752C
Installation
Mounting
Use the bolt pattern provided on the front face of the gun
block for mounting. Never use any of the assembly bolts
for mounting purposes.
Installation
AA
AE
FIG. 2
Key:
AA 5.096 in. (129.44 mm)
AB 2.7550 in. (69.98 mm)
AC 1.9360 in. (49.17 mm)
AD 3/8-16 x 0.875 in. deep
AE 1.9360 in. (49.17 mm)
AD
AB
AC
312752C 7
Operation
Operation
4. Tighten the hex locknut (103) against the injection
nozzle retainer (102). This will lock the injection
adjustment screw position.
Do not come into contact with Isocyanate. See Iso-
cyanate Hazard on page 5.
1. Ensure that a nozzle assembly with appropriate size
orifice is installed. See Orifice Size Selection section on page 13.
2. Turn on material pumps so that material will begin to
flow through the MixHead.
3. Rotate the injection adjustment screw to adjust
chemical pressures. If the injection adjustment
screw (104) is locked in position, break loose the
hex locknut (103) from the injection nozzle retainer
(102) to free the adjustment screw.
Pressure setting is an operator adjustment and
mixing pressures for of 2000-2200 psi (13.5-15.0
MPa, 135-150 bar) are recommended. Contact
your chemical system supplier for more detailed
information.
CAUTION
Do not over-adjust the injection adjustment screw and
close the needle valve into the orifice of the needle
housing. This will damage the injection needle and
orifice.
Do not use the needle valve as a shutoff valve.
FIG. 3: Nozzle Assembly
102
101
103
104
Key:
101 Injection Nozzle and Needle Valve Kit
102 Injection Nozzle Retainer
103 Hex Locknut
104 Injection Adjustment Screw
8 312752C
Maintenance
Maintenance
When using MixHead, be careful to avoid damaging precision tip. Return MixHead to Graco once a year for
maintenance.
Nozzle Assembly
Shut off all power. Bleed the chemical, hydraulic, and
tank pressures to zero pressure.
CAUTION
Relieving pressure will expose chemicals to moist air.
See Moisture Sensitivity of Isocyanates on page 5
for the effects of exposing chemicals to moist air.
Tools Required
• 1 in. wrench
• 3/8 in. wrench
• 5/32 hex key
• Brass wire brush
• O-ring pick
• Needle extracting tool
b. Holding on to 1/4-20 bolt, pull needle (206) out
rear of needle housing (205). See F
page 12.
5. Use an o-ring pick to remove o-rings.
CAUTION
DO NOT soak the o-ring in cleaning solvents as they
will swell and be unusable.
6. Use a brass, wire brush to clean metal parts as necessary.
7. Inspect the o-rings and replace with new ones as
required.
101
IG. 4 on
102
103
104
Disassembly
1. Use a 1 in. open-end wrench to unscrew the injection nozzle retainer (102) from the MixHead body.
2. Rotate injection nozzle and needle valve kit (101)
counter clockwise to remove from injection nozzle
retainer (102).
3. Using a 3/8 in. wrench and a 5/32 hex key, remove
hex locknut (103) and injection adjustment
screw (104) from injection nozzle retainer (102).
4. Remove needle (206) from needle housing (205).
See FIG. 4 on page 12.
a. Thread 1/4-20 bolt into rear of needle (206).
312752C 9
Key:
101 Injection Nozzle and Needle Valve Kit
102 Injection Nozzle Retainer
103 Hex Locknut
104 Injection Adjustment Screw
Maintenance
Reassembly
1. Install the o-rings with a liberal amount of silicone
grease.
2. Install the needle (206) into the needle
housing (205).
CAUTION
The needle valve and needle housing are matched
and these parts must not be used interchangeably.
3. Install the nozzle assembly into the MixHead body.
10 312752C
Parts
Parts
5
3
9
8
7
6
4
3
2
10
Ref Part Description Qty
1 6306-110 ELBOW; 45 deg., SAE 08 X 1/2 tube, mf 4
2 20163-4 TUBE; 1/2 in. 4
3 6306-61 ADAPTER; 1/2 npt x 1/2 tube, ff 6
4 94/1013/99 ADAPTER; JIC 10 X 1/2 NPT, ms 2
5 1508-3 NIPPLE; 1/2 mpt x 3/4-16 JIC 4
6 5514-6 3/4 O-RING X 1/2 TUBE, 90 elbow 1
7 20163-3 TUBE; hydraulic (open) 1
8 6306-79 TUBE; 3/4-16 o-ring x 1/2 1
9 20162-4 TUBE, hydraulic (closed) 1
10 NOZZLE, assy. 2
1
Nozzle Assembly
101
102
103
104
Ref Part Description Qty
101 (see p. 12) KIT, injection nozzle and
102 30150-24-4 SCREW, adjustment, injection 1
103 30150A-25 RETAINER, injection nozzle 1
104 30150-23 NUT, hex, 3/8-40 1
1
needle valve
312752C 11
Parts
Injection Nozzle and Needle Valve Kits
Kit Orifice size (mm)
24A036 Calibrate
24A037 0.25
24A038 0.35
24A039 0.50
24A040 0.60
24A041 0.70
24A042 0.80
24A043 0.90
24A044 1.00
24A045 1.10
24A046 1.20
24A047 1.30
24A050 1.40
24A051 1.50
24A052 1.60
Kit Orifice size (mm)
24A053 1.70
24A054 1.80
24A055 1.90
24A056 2.00
24A057 2.50
24A058 3.00
24A059 3.50
24A060 4.00
24A061 4.20
24A062 4.50
24A063 5.00
24A064 5.50
24A065 6.00
24A066 6.50
24A067 7.00
204
206
FIG. 4
Ref Part No. Description Qty
201 0135-108 O-RING; fluoroelastomer 2
202 0137-016 RING; back-up, PTFE 2
203 0485 O-RING; fluoroelastomer 2
204 9405 O-RING; fluoroelastomer 1
205 30150A-24-1 HOUSING; needle 1
206 NEEDLE 1
203
202
205
201
12 312752C
Orifice Size Selection
This section is provided to approximate an effective
orifice size for a given application. There is no guarantee that this formula will provide the correct orifice size.
Use the following equation to find a suggested orifice
size for your application.
D F 0.324⁄()P Sg 62.4××()×=
D = Orifice Diameter (mm)
F = Flow through orifice (pounds / second)
P = Dispensing Pressure for Chemical (psi)
Sg = Specific Gravity of Chemical
Parts
The calculated “D” is the suggested orifice size in millimeters. Round to the nearest available orifice size listed
on page 12.
312752C 13
Parts
14 312752C
Technical Data
Technical Data
Max Weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.25 in. Stroke Models: 27 lb (12.25 kg)
4 in. Stroke Models: 33 lb (14.97 kg)
Wetted Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stainless Steel, Trivalent Chromium Plated Carbon Steel,
PTFE, Perifluorinated & EPDM O-rings
Dimensions
CA
CE
CF
CD
CC
CB
2.25 in. Stroke
Models
Ref in. mm in. mm
CA 6.74 171.1 6.74 171.1
CB 18.84 478.4 23.41 594.6
CC 1.56 39.7 3.50 39.7
CD 1.14 29.0 1.14 29.0
CE 0.97 24.6 0.97 24.6
CF 1.56 39.6 1.56 39.6
4 in. Stroke
Models
F
IG. 5
312752C 15
Graco Ohio 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. This warranty applies only when the equipment is installed, operated and maintained in accordance with Graco’s written
recommendations.
This warranty does not cover, and Graco shall not be liable for general wear and tear, or any malfunction, damage or wear caused by faulty
installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or substitution of
non-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the incompatibility of Graco equipment with
structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture, installation, operation or
maintenance of structures, accessories, equipment or materials not supplied by Graco.
This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for verification of
the claimed defect. If the claimed defect is verified, Graco will repair or replace free of charge any defective parts. The equipment will be returned
to the original purchaser transportation prepaid. If inspection of the equipment does not disclose any defect in material or workmanship, repairs will
be made at a reasonable charge, which charges may include the costs of parts, labor, and transportation.
THIS WARRANTY IS EXCLUSIVE, AND IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.
Graco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no other remedy
(including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or property, or any other incidental or
consequential loss) shall be available. Any action for breach of warranty must be brought within two (2) years of the date of sale.
GRACO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE, IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS OR COMPONENTS SOLD BUT NOT
MANUFACTURED BY GRACO. These items sold, but not manufactured by Graco (such as electric motors, switches, hose, etc.), are subject to
the warranty, if any, of their manufacturer. Graco will provide purchaser with reasonable assistance in making any claim for breach of these
warranties.
In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying equipment hereunder, or
the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach of contract, breach of warranty, the
negligence of Graco, or otherwise.
FOR GRACO CANADA CUSTOMERS
The Parties acknowledge that they have required that the present document, as well as all documents, notices and legal proceedings entered into,
given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. Les parties reconnaissent avoir convenu que la
rédaction du présente document sera en Anglais, ainsi que tous documents, avis et procédures judiciaires exécutés, donnés ou intentés, à la suite
de ou en rapport, directement ou indirectement, avec les procédures concernées.
Graco Ohio Information
For the latest information about Graco products, visit www.graco.com.
TO PLACE AN ORDER, contact your Graco distributor or call to identify the nearest distributor.
Toll Free: 1-800-746-1334 or Fax: 330-966-3006
All written and visual data contained in this document reflects the latest product information available at the time of publication.
GRACO OHIO INC. 8400 PORT JACKSON AVE NW, NORTH CANTON, OH 44720
Graco reserves the right to make changes at any time without notice.
This manual contains English. MM 312752
Graco Headquarters: Minneapolis
International Offices: Belgium, China, Japan, Korea
Copyright 2008, Graco Ohio Inc. is registered to ISO 9001
www.graco.com
Revised 5/2009
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