Graco 310543E User Manual
Instructions–Parts List
MODEL 482
310543E
Automatic Metering Valves
Used to provide precise dispense of medium– to high–viscosity sealants and
adhesives in a non–hazardous location.
3200 psi (22.0 MPa, 220 bar) Maximum Fluid Working Pressure
Part No. C02021, Series B
Model 482–B
7/8–18 uns externally threaded fluid inlet boss and 7/16–20 unf mounting hole
1/4 npt(f) material inlet, 1/8 npt(f) material outlet
Part No. C02022, Series C
Model 482–C
7/16–20 unf mounting hole
1/4 npt(f) material inlet, 1/8 npt(f) material outlet
Part No. C02025, Series B
Model 482–E
7/16–20 unf mounting hole
1/4 npt(f) material inlet, 1/4 npt(f) material outlet
EN
Part No. C02078, Series B
Model 482–DA, with double acting air cylinder
7/16–20 unf mounting hole
1/4 npt(f) material inlet, 1/4 npt(f) material outlet
Part No. C02026
Model 482–HA; same as Part No. C02022, with trigger-actuated pistol grip handle
Part No. C02027
Model 482–MS, for moisture sensitive materials;
same as Part No. C02021, with seal fluid reservoir and plugged 7/16–20 mounting hole
Important Safety Instructions.
Read all warnings and instructions in this manual.
Save these instructions.
U.S. Patent Nos. 3,160,331 and 3,132,775
Table of Contents
Warnings 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setup 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ground the System 5. . . . . . . . . . . . . . . . . . . . . . . . .
Installation 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure Relief Procedure 6. . . . . . . . . . . . . . . . . . .
How the Metering Valve Operates 6. . . . . . . . . . . . .
Adjusting the Valve 6. . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AMV Disassembly 8. . . . . . . . . . . . . . . . . . . . . . . . . .
AMV Reassembly 9. . . . . . . . . . . . . . . . . . . . . . . . . . .
AMV Disassembly (C02026) 10. . . . . . . . . . . . . . . .
AMV Reassembly (C02026) 11. . . . . . . . . . . . . . . . .
AMV Disassembly (C02027) 12. . . . . . . . . . . . . . . .
AMV Reassembly (C02027) 12. . . . . . . . . . . . . . . . .
Parts 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part Nos. C02021, C02022, C02025 13. . . . . . . . . .
Part No. C02078 14. . . . . . . . . . . . . . . . . . . . . . . . . . .
Part No. C02026 15. . . . . . . . . . . . . . . . . . . . . . . . . . .
Part No. C02027 16. . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid Nozzles 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Needle Installation Tool 918482 17. . . . . . . . . . . . . .
Technical Data 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Standard Warranty 20. . . . . . . . . . . . . . . . . . . . . .
Graco Information 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Symbols
Warning Symbol
WARNING
This symbol alerts you to the possibility of serious
injury or death if you do not follow the instructions.
WARNING
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture, malfunction, or start unexpectedly and
INSTRUCTIONS
result in serious injury.
This equipment is for professional use only.
Read all instruction manuals, warnings, tags, and labels before operating the equipment.
Use the equipment only for its intended purpose. If you are uncertain about usage, call your
Graco distributor.
Do not alter or modify this equipment. Use only genuine Graco parts and accessories.
Caution Symbol
CAUTION
This symbol alerts you to the possibility of damage to
or destruction of equipment if you do not follow the
instructions.
Check the equipment daily. Repair or replace worn or damaged parts immediately.
Do not exceed the maximum working pressure of the lowest rated system component. These
metering valves have a 3200 psi (22.0 MPa, 220 bar) Maximum Working Pressure.
Route the hoses away from the traffic areas, sharp edges, moving parts, and hot surfaces. Do
not expose Graco hoses to temperatures above 82° C (180° F) or below –40° C (–40° F).
Use fluids and solvents that are chemically compatible with the equipment wetted parts. See
the Technical Data sections of all the equipment manuals. Always read the material manufacturer’s literature before using fluid or solvent in this equipment.
Wear hearing protection when operating this equipment.
Comply with all applicable local, state and national fire, electrical and other safety regulations.
TOXIC FLUID HAZARD
Hazardous fluids or toxic fumes can cause a serious injury or death if splashed in the eyes or on
the skin, swallowed, or inhaled.
Know the specific hazards of the fluid you are using. Read the fluid manufacturer’s warnings.
Store hazardous fluid in an approved container. Dispose of the hazardous fluid according to all
local, state, and national guidelines.
Wear appropriate protective clothing, gloves, eyewear, and respirator.
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WARNING
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SKIN INJECTION HAZARD
Spray from the metering valve, hose leaks, or ruptured components can inject fluid into your body
and cause extremely serious injury, including the need for amputation. Splashing fluid in the eyes
or on the skin can also cause serious injury.
Fluid injected into the skin might look like just a cut, but it is a serious injury. Get immediate
surgical treatment.
Do not point the metering valve at anyone or at any part of the body.
Do not put your hand or fingers over the nozzle.
Do not stop or deflect fluid leaks with your hand, body, glove, or rag.
Do not “blow back” fluid; this is not an air spray system.
Follow the Pressure Relief Procedure on page 6 if the nozzle clogs, and before cleaning,
checking or servicing the equipment.
Tighten all fluid connections before operating the equipment.
Check the hoses, tubes, and couplings daily. Replace worn, damaged, or loose parts immedi-
ately. Do not repair high pressure couplings; you must replace the entire hose.
Fluid hoses must have spring guards on both ends, to help protect them from rupture caused by
kinks or bends near the couplings.
FIRE AND EXPLOSION HAZARD
Improper grounding, poor air ventilation, open flames, or sparks can cause a hazardous condition
and result in a fire or explosion and serious injury.
Ground the equipment and the object being sprayed. See Ground the System on page 5.
Provide fresh air ventilation to avoid the buildup of flammable fumes from solvent or the fluid
being dispensed.
Extinguish all the open flames or pilot lights in the dispense area.
Electrically disconnect all the equipment in the dispense area.
Keep the dispense area free of debris, including solvent, rags, and gasoline.
Do not turn on or off any light switch in the dispense area while operating or if fumes are pres-
ent.
Do not smoke in the dispense area.
Do not operate a gasoline engine in the dispense area.
If there is any static sparking while using the equipment, stop dispensing immediately. Identi-
fy and correct the problem.
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Setup
Ground the System
WARNING
FIRE AND EXPLOSION HAZARD
To reduce the risk of a fire, explosion,
and serious injury, proper electrical
grounding of every part of your system is
essential. Read the warning section,
FIRE AND EXPLOSION HAZARD, on
page 4 and follow the grounding
instructions below.
The following grounding instructions are minimum
requirements for a basic dispensing system. Your
system may include other equipment or objects which
must be grounded. Check your local electrical code for
detailed grounding instructions for your area and type
of equipment. Your system must be connected to a
true earth ground.
1. Pump: ground the pump by connecting a ground
wire and clamp as described in your separate
pump instruction manual.
2. Automatic metering valve: ground the metering
valve by connecting it to a properly grounded fluid
hose and pump.
Installation
NOTE: Read this manual thoroughly before installing
the automatic metering valve.
The metering valve has a tapped hole for mounting,
making it ideal for automatic systems and for use in
multiple manifold high production operations. The
valve can be supplied by any standard Graco pump.
1. Inspect the metering valve for shipping damage. If
damage is found, notify the carrier immediately.
2. Attach the meter to its mounting fixture by means
of the 7/16–20 tapped mounting hole in the valve
body (1). Keep in mind that the height of the valve
must be adjustable so either the part or the valve
can retract at the same instant that the valve shuts
off.
3. Connect the actuating air supply (minimum 80
psi/0.55 MPa/5.5 bar) from a three-way, normally
closed air valve to the 1/8 npt(f) air inlet. Cycle the
valve. Observe the action of the needle valve (6)
and the spring (23, not present on Part No.
C02078 AMV) through the vent hole in the valve
body (1).
3. Fluid hoses: use only electrically conductive fluid
hoses.
4. Fluid supply container: ground according to the
local code.
5. All solvent pails used when flushing: ground according to local code. Use only metal pails, which
are conductive, placed on a grounded surface. Do
not place the pail on a non-conductive surface,
such as paper or cardboard, which interrupts the
grounding continuity.
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Operation
Pressure Relief Procedure
WARNING
INJECTION HAZARD
The system pressure must be manually
relieved to prevent the system from
starting or spraying accidentally. Fluid
under high pressure can be injected through the
skin and cause a serious injury. To reduce the risk
of an injury from injection, splashing fluid, or moving parts, follow the Pressure Relief Procedure
whenever you:
are instructed to relieve the pressure,
stop dispensing,
check or service any of the system equipment,
or install or clean the nozzle.
1. Shut off the fluid supply line to the automatic
metering valve.
2. Close the bleed-type master air valve (required in
your system) to shut off the air to the automatic
metering valve.
An air operated spool valve directs pressurized fluid to
either side of a floating piston. Shot size is easily and
quickly changed by simply lengthening or shortening
the piston stroke (see Adjusting the Valve).
At its maximum of 4 cc of moderate viscosity fluid, the
valve will dispense up to 15 shots per minute. Lower
viscosities or smaller shots permit even faster operation.
A special snuffer action at the end of the dispensing
cycle draws fluid back, preventing dripping or stringing.
Adjusting the Valve
1. Connect the fluid supply line to the fluid inlet or to
the external threads of the boss (C02021 only).
2. Gradually apply fluid pressure while cycling the
valve. Increase pressure until the desired dispensing rate is attained and all air is purged from the
fluid supply line.
NOTE: To purge air from the fluid supply line, hold the
valve higher than the fluid source with the hose on a
gentle incline and cycle the valve repeatedly.
3. Repeatedly actuate the automatic metering valve
until no fluid flows.
4. Open the pump drain valve to help relieve fluid
pressure in the pump, hose, and automatic metering valve. Actuating the valve to relieve pressure
may not be sufficient. Have a container ready to
catch the drainage.
5. Leave the drain valve open until you are ready to
dispense again.
6. If you think that the valve nozzle or fluid hose is
completely clogged or that pressure has not been
fully relieved after following the steps above, very
slowly loosen the hose end coupling and relieve
pressure gradually, then loosen the coupling
completely. Clear the nozzle or hose obstruction.
How the Metering Valve Operates
The metering valve is an automatic, air-operated,
single-acting valve for dispensing accurately metered
amounts of fluid repeatedly. The valve can dispense
from 0.2 cc to 4 cc of fluid, with a viscosity range from
3000 to 1 million centipoise.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure at left.
3. Relieve the pressure.
4. Install a suitable nozzle in the fluid outlet of the
retainer (2). See page 17 for available nozzle
sizes.
5. Turn the nut (8) counterclockwise to unlock. Turn
the retainer (2) counterclockwise until it engages
the stop screw (7) but does not hinder the free
sliding action of the needle valve (6).
NOTE: Adjusting the retainer to the extreme open
position may cause the valve to malfunction due to
cocking of internal components.
6. Adjust the shot size by turning the retainer clockwise for less fluid, counterclockwise for more fluid.
NOTE: The valve must be cycled and adjusted simultaneously when attempting to reduce shot size.
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