Graco g250, G3000HR, G250HR, G3000 User Manual
Instructions-Parts
Volumetric Fluid Flow
Meter
For precise metering of plural component fluids and solvents.
See page 2 for model information, including maximum working pressure.
Important Safety Instructions
Read all warnings and instructions in this
manual. Save these instructions.
Recognized Component
9902471
Conforms to UL2279
Certified to
CAN/CSA E79-0
CAN/CSA E79-11
G3000 and G3000HR
(Model 289813 with 90°
Sensor Connector Shown)
308778L
TI11579a
II 1 G
*
0359
Intrinsically Safe for Hazardous Locations (Class I; Division 1;
Group D) when used with an approved barrier only.
* CE mark approvals only apply to meters used as part of Graco
ProMix, ProMix 2KS, and PrecisionMix II Systems.
EExia II A T3
ITS03ATEX21212
G250 and G250HR
TI13038a
Models
Contents
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Low Pressure Meters . . . . . . . . . . . . . . . . . . . . . 2
High Pressure Meters . . . . . . . . . . . . . . . . . . . . . 2
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Dust and Foreign Matter . . . . . . . . . . . . . . . . . . . 5
Installing the Flow Meter . . . . . . . . . . . . . . . . . . . 5
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Pressure Relief Procedure . . . . . . . . . . . . . . . . . 7
Flow Meter Function . . . . . . . . . . . . . . . . . . . . . . 7
Recommended Usage . . . . . . . . . . . . . . . . . . . . 7
Flow Volume Range . . . . . . . . . . . . . . . . . . . . . . 7
Checking the Meter Accuracy . . . . . . . . . . . . . . . 7
Models
Low Pressure Meters
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Residue Build-up on the Meter Gears . . . . . . . . . 9
Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Cleaning or Servicing the Meter Chamber . . . . 10
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Flow Meter Kits . . . . . . . . . . . . . . . . . . . . . . . . . 11
Bare Meter Assemblies . . . . . . . . . . . . . . . . . . . 12
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Pressure Drop Curve . . . . . . . . . . . . . . . . . . . . . . . 17
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 18
Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 18
300 psi (2.1 MPa, 21 bar) Maximum Fluid Working Pressure
Meter Part
No. Series Model Flow Range
249426 A G250 0.02 to 1.0 gpm (75 to 3800 cc/min)
249427 A G250HR 0.01 to 0.5 gpm (38 to 1900 cc/min)
High Pressure Meters
4000 psi (28 MPa, 280 bar) Maximum Fluid Working Pressure
Meter Part
No. Series Model Flow Range
239716 A G3000 0.02 to 1.0 gpm (75 to 3800 cc/min)
244292 A G3000HR 0.01 to 0.5 gpm (38 to 1900 cc/min)
289813 A G3000, with 90° sensor connector 0.02 to 1.0 gpm (75 to 3800 cc/min)
289814 A G3000HR, with 90° sensor connector 0.01 to 0.5 gpm (38 to 1900 cc/min)
2 308778L
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
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.
• Do not spray without tip guard and trigger guard installed.
• Engage trigger lock when not spraying.
• 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.
SPECIAL CONDITIONS
Equipment must comply with the following conditions to avoid a hazardous condition which can cause
fire, explosion, or electric shock:
• Never use the flow meter with an electrostatic gun isolation stand.
• Keep liquids away from the electronic sensor device.
• Do not service the electronic sensor. Return it to your Graco distributor for service.
PRESSURIZED EQUIPMENT HAZARD
Fluid from the gun/dispense valve, leaks, or ruptured components can splash in the eyes or on skin and
cause serious injury.
• Follow Pressure Relief Procedure in this manual, when you stop spraying 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.
308778L 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.
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
4 308778L
Installation
• All electrical equipment must only be installed by
a qualified electrician.
• Understand and follow your local code and safety
regulations for hazardous location wiring of intrinsically safe circuits.
Dust and Foreign Matter
Avoid having dust or foreign matter enter the flow meter
by taking the following precautions:
• Thoroughly flush the fluid supply lines before installing the flow meter.
• When installing fittings, make sure that no sealing
tape overlaps into the inside of the pipe.
• Install a 100 mesh fluid filter upstream of the flow
meter.
Installation
Installing the Flow Meter
• Flow volume can only be measured at the location
where the flow meter is installed.
• The Fluid Flow Meters are intrinsically safe for Class
I; Division 1; Group D hazardous indoor (NEMA 1)
locations when installed with an intrinsically safe
power device and wiring.
Refer to ANSI standards ISA-RP12.6, NEC Article
504 and the Canadian Electrical Code Appendix F.
• Do not use more than 200 ft. (61 m) of cable.
• Refer to F
connectors, and fluid shutoff valves. Install a check
valve to prevent backflow. The arrows on the flow
meter and check valve show the direction of fluid
flow.
• The shutoff valves allow you to isolate the meter for
service.
• Refer to the Technical Data and Dimensions
Drawings for dimension, inlet/outlet size, temperature and other specifications.
IG. 1 to locate and install the flow meter,
Electronic Sensor Device
Fluid LineFluid Shutoff Valve
on outlet side
FIG. 1: Typical Installation
Cable
Ground Sheath
Flow Meter
Check Valve Fluid Shutoff Valve
on outlet side
7379A
308778L 5
Installation
Grounding
1. Ground the flow meter by connecting a grounded
cable to the sensor.
Have a qualified electrician check the electrical
grounding continuity between the flow meter sensor
and a true earth ground; remove the cable connector from the sensor and measure the resistance
from the cable connector Pin B to true earth ground.
Refer to F
If the resistance is greater than 25 ohms, check the
cable ground connection. Refer to F
the ground sheath or replace the cable. Do not operate the system until the problem is corrected.
IG. 2.
IG. 2. Reconnect
2. Always ground the fluid supply unit, using one of the
following options:
a. Mount the meter to a grounded conductive sur-
face, or
b. Connect the conductive fluid hose to the meter
inlet and outlet, or
c. Connect a ground wire to the meter's M6
mounting holes.
3. Never use the flow meter with an electrostatic gun
isolation stand.
A +10-30 Vdc Supply (red)
C
A
B
B Ground (black)
C Signal Out (white)
7379A
FIG. 2
6 308778L
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