Graco DM-22 User manual

3A7931B
EN
Instructions/Parts
22:1 Ratio Stainless Steel
DM-22 Supply System
Used for precision dispense of single component viscous materials for 300 CC (0.3 liter),
600 CC (0.6 liter) and 1 Gallon (3.79 liter) containers. For professional use only.
Not approved for use in European explosive atmosphere locations.
Part No. 25T471, 300 CC
Part No. 25T472, 600 CC
Part No. 25T473, 1 Gallon
Includes Pump and Ram
2200 psi (15.2 MPa, 152 bar) Maximum Fluid Working Pressure
100 psi (0.7 MPa, 7 bar) Maximum Air Inlet Pressure
Important Safety Instructions
Read all warnings and instructions in this
manual before using the equipment. Save
these instructions.
300 CC 1 Gallon
600 CC

23A7931B
Contents
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . . 6
Component Identification . . . . . . . . . . . . . . . . . . . . 7
25T471, 300 CC . . . . . . . . . . . . . . . . . . . . . . . . . 7
25T472, 600 CC . . . . . . . . . . . . . . . . . . . . . . . . . 8
25T473, 1 Gallon . . . . . . . . . . . . . . . . . . . . . . . . 9
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
System Location and Set Up . . . . . . . . . . . . . . 10
Connect and Disconnect Air Tubes . . . . . . . . . 11
System Components and Accessories . . . . . . . 11
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Pressure Relief Procedure . . . . . . . . . . . . . . . . 12
Flush the System . . . . . . . . . . . . . . . . . . . . . . . 13
Start and Adjust the Ram . . . . . . . . . . . . . . . . . 13
Start and Adjust the Pump . . . . . . . . . . . . . . . . 14
Prime the Pump and Pump Fluid . . . . . . . . . . . 16
Change the Fluid Can . . . . . . . . . . . . . . . . . . . . 16
Shutdown and Care of the Pump . . . . . . . . . . . 17
Recycling and Disposal . . . . . . . . . . . . . . . . . . . . 17
End of Product Life . . . . . . . . . . . . . . . . . . . . . . 17
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Accessory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Can Opener
(not supplied with system) . . . . . . . . . . . . . 24
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
25T471, 300 CC . . . . . . . . . . . . . . . . . . . . . . . . 24
25T472, 600 CC . . . . . . . . . . . . . . . . . . . . . . . . 25
25T473, 1 Gallon . . . . . . . . . . . . . . . . . . . . . . . 25
Technical Specifications . . . . . . . . . . . . . . . . . . . . 26
California Proposition 65 . . . . . . . . . . . . . . . . . . . 27
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 28

Warnings
3A7931B 3
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclama-
tion 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.
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.
• 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.
MOVING PARTS HAZARD
Moving parts can pinch, cut 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 and disconnect all power sources.

Warnings
43A7931B
FIRE AND EXPLOSION HAZARD
Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. Paint or sol-
vent 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 dispensing device/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.
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 Sheet (SDS) 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.
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 com-
ponent. See Technical Specifications in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical Specifica-
tions in all equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete infor-
mation about your material, request Safety Data Sheet (SDS) 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 manu-
facturer’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.

Warnings
3A7931B 5
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.
PERSONAL PROTECTIVE EQUIPMENT
Wear appropriate protective equipment when in the work area to help prevent serious injury, including
eye injury, hearing loss, inhalation of toxic fumes, and burns. Protective equipment includes but is not
limited to:
• Protective eyewear, and hearing protection.
• Respirators, protective clothing, and gloves as recommended by the fluid and solvent manufacturer.

Typical Installation
63A7931B
Typical Installation
Key:
A Main Air Line
B Supply System Air Line
C DM-22 Supply System
D Air Filter (Required, but not supplied)
E Pressure Regulator Valve (Required, but not supplied)
F Bleed-type Master Air Valve (Required, but not supplied)
FIG. 1: Typical Installation
A
B
DEF
C
DM-22 Supply System, 300 CC Shown

Component Identification
3A7931B 7
Component Identification
25T471, 300 CC
Key:
AA Pump
AB Ground Wire
AC Bleed-Type Master Air Switch
AD Pump Bleeder Valve
AE Pump Air Regulator
AF Ram Air Regulator
AG Fluid Outlet Fitting
AH Cartridge Housing
AJ Manifolds
AK Pump Air Pressure Gauge
AL Ram Air Pressure Gauge
AM Pump Bracket
AN Base
AP Ram Director Switch
AR Main Air Line Inlet Fitting
AS Pump Fluid Intake Housing
AZ Cartridge Rod
FIG. 2: System Components - 300 CC
AA
AB
AC
AD
AE
AF
AG
AH
AJ
AK
AL
AM
ANAP AR
AS
AZ

Component Identification
83A7931B
25T472, 600 CC
Key:
AA Pump
AB Ground Wire
AC Bleed-Type Master Air Switch
AD Pump Bleeder Valve
AE Pump Air Regulator
AF Ram Air Regulator
AG Fluid Outlet Fitting
AH Cartridge Housing
AJ Manifolds
AK Pump Air Pressure Gauge
AL Ram Air Pressure Gauge
AM Pump Bracket
AN Base
AP Ram Director Switch
AR Main Air Line Inlet Fitting
AS Pump Fluid Intake Housing
AZ Cartridge Rod
FIG. 3: System Components - 600 CC
AA
AB
AC
AD
AE
AF
AG
AH
AJ
AK
AL
AM
ANAP AR
AS
AZ

Component Identification
3A7931B 9
25T473, 1 Gallon
Key:
AA Pump
AB Ground Wire
AC Bleed-Type Master Air Switch
AD Pump Bleeder Valve
AE Pump Air Regulator
AF Ram Air Regulator
AG Fluid Outlet Fitting
AK Pump Air Pressure Gauge
AL Ram Air Pressure Gauge
AM Pump Bracket
AN Base
AP Ram Director Switch
AR Main Air Line Inlet Fitting
AS Pump Fluid Intake Housing
AT Air Assist Valve (Push Button)
AU Wiper Plate Assembly
AV Wiper Plate Cap Screws
AW Wiper Plate Bleed Valve
AX Wiper Plate Ring
AY Wiper Plate Connector
FIG. 4: System Components - 1 Gallon
AA
AB
AC
AD
AEAF
AG
AKAL
AM
ANAP AR
AS
AW
AU
AX
AY
AV
AT

Installation
10 3A7931B
Installation
Grounding
DM-22 Supply System (C): Connect the supplied
ground wire and clamp to a true earth ground.
Air and fluid hoses: use only electrically conductive
hoses with a maximum of 500 ft. (150 m) combined
hose length to ensure grounding continuity. Check
hoses’ electrical resistance. If total resistance to ground
exceeds 29 megohms, replace hose immediately.
Air compressor: follow manufacturer’s recommenda-
tions.
Spray gun / Dispense valve: ground through connec-
tion to a properly grounded fluid hose and pump.
Fluid supply container: follow local code.
To maintain grounding continuity when flushing or
relieving pressure: hold metal part of the spray
gun/dispense valve firmly to the side of a grounded
metal pail, then trigger the gun/valve.
System Location and Set Up
NOTE: Reference numbers and letters in parentheses
in the text refer to the callouts in FIG. 2, FIG. 3 and FIG. 4
on page 7, 8 and 9 and the parts drawings. Refer to
those for installation.
If you supply your own accessories, be sure they are
adequately sized and pressure-rated to meet the sys-
tem’s requirements. Contact your Graco distributor for
assistance in designing a system to suit your needs.
1. Place the system on a hard, level surface. Check
that the system is level in all directions. Refer to
Dimensions on page 24 to ensure there is sufficient
overhead clearance for the pump when the ram is
fully raised. Leave room on both sides for air regula-
tors to be easily accessible.
2. Connect air tubes. Refer to Connect and Discon-
nect Air Tubes on page 11. Connect an air supply
hose to the 8 mm(f) Main Air Line Inlet Fitting (AR).
The equipment must be grounded to reduce the risk
of static sparking. Static sparking can cause fumes to
ignite or explode. Grounding provides an escape wire
for the electric current.
FIG. 5 Grounding
Ground Wire