Graco Series A Stücklistenhandbuch

Instructions-Parts

Low Flow Fluid 

Regulator

Pneumatic controlled fluid regulator provides accurate, positive pressure control of

finishing coatings in low flow applications. For professional use only.

100 psi (0.7 MPa, 7 bar) Maximum Air Inlet Pressure

300 psi (2.1 MPa, 21 bar) Maximum Fluid Inlet Pressure



90 psi (0.63 MPa, 6.3 bar) Maximum Regulated Fluid

Pressure (High Pressure Port, All Models)

TI15288a

24C375, 24E471, and 24E472

FXRG1X, FXRG2X, and FXRG3X (w/o transducer fitting)

FXRG1T, FXRG2T, and FXRG3T (w/transducer fitting)

Part No. 24C375, Series A

Part No. FXRG1X and FXRG1T

1:1 Ratio, 90 psi (0.63 MPa, 6.3 bar) Maximum

Regulated Fluid Pressure (Low Pressure Port)

Part No. 24E471, Series A 

Part No. FXRG2X and FXRG2T

1:2 Ratio, 50 psi (0.35 MPa, 3.5 bar) Maximum

Regulated Fluid Pressure (Low Pressure Port)

Part No. 24E472, Series A

Part No. FXRG3X and FXRG3T

1:3 Ratio, 30 psi (0.21 MPa, 2.1 bar) Maximum

Regulated Fluid Pressure (Low Pressure Port)

Important Safety Instructions

Read all warnings and instructions in this

manual before using the equipment.

Save these instructions.

3A0427D

23A0427D

Contents

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Mount the Fluid Regulator . . . . . . . . . . . . . . . . . . 5

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Air Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Fluid Inlet Line . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Regulated Fluid Outlet Line . . . . . . . . . . . . . . . . 5

Flush Before Using Equipment . . . . . . . . . . . . . . 5

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Pressure Relief Procedure . . . . . . . . . . . . . . . . . 8

Available Pressures . . . . . . . . . . . . . . . . . . . . . . 8

Air High Inlet Port Operation . . . . . . . . . . . . . . . . 8

Air Low Inlet Port Operation . . . . . . . . . . . . . . . . 8

Adjust the Fluid Regulator . . . . . . . . . . . . . . . . . . 8

Flush the Equipment . . . . . . . . . . . . . . . . . . . . . . 9

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Change the Ratio . . . . . . . . . . . . . . . . . . . . . . . . 11

Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . 17

Technical Specifications . . . . . . . . . . . . . . . . . . . . 19

Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 20

Warnings

3A0427D 3

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 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.

WARNING

FIRE AND EXPLOSION HAZARD

Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. Paint or

solvent 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 for 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 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 ifstaticsparkingoccursoryoufeelashock.Donotuseequipmentuntil

you identify and correct the problem.

• Keep a working fire extinguisher in the work area.

PRESSURIZED EQUIPMENT HAZARD

Fluid from the equipment, leaks, or ruptured components can splash in the eyes or on skin and cause

serious injury.

• Follow the Pressure Relief Procedure when you stop spraying/dispensing 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.

Warnings

43A0427D

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 , page 16, in all equipment manuals.

• Use fluids and solvents that are compatible with equipment wetted parts. See , page 16, in all

equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete information

about your material, request Safety Data Sheets (SDSs) 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. 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.

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 Sheets (SDSs) 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.

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.

WARNING

Installation

3A0427D 5

Installation

Mount the Fluid Regulator

See FIG. 1. Mount the fluid regulator (C) in a location

close to the fluid dispense device. A mounting bracket

(D) is supplied. See Dimensions on page 15 for

mounting information.

Grounding

Mount the regulator to a conductive mounting surface

(E) which is connected to a true earth ground. Follow

local code. Graco Part No. 222011 Ground Wire and

Clamp is available as an accessory. See FIG. 1.

Air Supply

The regulator’s air inlet fittings accept 5/32 in. (4 mm)

OD tubing. Air pressure can be controlled manually or

with electronic pressure controls.

Connections can be made in two ways:

• Use separate high (A) and low (B) air pressure

supply lines, connected as shown in FIG. 1.

• Use a single air supply line and connect it to the

high or low pressure air inlet fitting alternately, as

desired.

Fluid Inlet Line

See FIG. 1. Connect the fluid inlet line (G) between the

1/4 npt(m) fluid inlet fitting and the fluid supply.

Install the following accessories in the order shown in

FIG. 1, using adapters as necessary.

•Fluid filter (H): to filter particles from the fluid

before it passes through the fluid regulator.

•Fluid drain valve (J): required in your system, to

relieve fluid pressure in the fluid regulator.

•Fluid shutoff valve (K): shuts off fluid flow.

Regulated Fluid Outlet Line

See FIG. 1. Connect the regulated fluid outlet line (F)

between the 1/8 npt(f) fluid outlet port and the system’s

fluid dispense point.

NOTE: All components located downstream of the fluid

regulator must be rated for the maximum fluid inlet

pressure sent to the regulator. Do not use the regulator

as a fluid shutoff valve.

Flush Before Using Equipment

The equipment was tested with a rust inhibiting test

fluid. To avoid contaminating your system, flush the

equipment with a compatible solvent before using the

equipment. See Flush the Equipment, page 9.

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.

Installation

63A0427D

Key:

A Air High Inlet Port

B Air Low Inlet Port

C Low Flow Fluid Regulator

D Mounting Bracket (supplied)

E Grounded Mounting Surface

F Regulated Fluid Outlet Line

G Fluid Inlet Supply Line

H Fluid Filter

J Fluid Drain Valve (required)

K Fluid Shutoff Valve

L Ground Wire and Clamp (Part No. 222011)

FIG. 1: Typical Installation

Pilot air signals from a

manual air regulator or

electronic air control

From fluid supply

To fluid dispense point

TI15498a

Installation with a 24C375, 24C471, or 24E472 regulator.

Installation with an IniFlex™FXRG regulator. See the

IniFlex manual (3A8637) for more IniFlex information.

Installation

3A0427D 7

Operation

83A0427D

Operation

Pressure Relief Procedure

Follow the Pressure Relief Procedure whenever

you see this symbol.

1. Shut off the fluid supply.

2. Leave on the air to the fluid regulator.

3. Trigger the gun to relieve the fluid pressure.

4. Shut off the air supply to the fluid regulator.

5. Open the fluid drain valve to relieve all fluid

pressure, having a container ready to catch the

drainage.

Available Pressures

This fluid regulator provides accurate, positive fluid

pressure control to a spray gun or other device. The

regulated fluid outlet pressure is proportional to the pilot

air signal supplied to either the high or low air inlet port.

Each port can be controlled independently.

All three models have the high pressure port, which is

fixed at 1:1. Ratios of 1:1, 1:2, and 1:3 are available for

low pressure applications. The ratio spacer (3, FIG. 2) is

color coded to indicate ratio:

• Silver (1:1 ratio)

•Green (1:2 ratio)

• Black (1:3 ratio)

See the Performance Data on pages 17 and 18 to help

determine which ratio is best for your application.

Performance is affected by:

• Fluid inlet pressure

•Fluid viscosity

• Size (ID) and length of the regulated fluid outlet line

• Size (ID) and length of the fluid inlet supply line.

Air High Inlet Port Operation

Use the air high inlet port for:

• commanding a higher pressure for faster flushing

• higher fluid viscosities

To operate, shut off the air to the low pressure inlet and

turn on the air to the high pressure inlet.

Air Low Inlet Port Operation

Use the air low inlet port for:

• precise control in critical applications

• lower fluid viscosities

To operate, shut off the air to the high pressure inlet and

turn on the air to the low pressure inlet.

Adjust the Fluid Regulator

The fluid regulator controls pressure downstream from

its outlet. Set the inlet fluid pressure at least 10 psi (.07

MPa, 0.7 bar) higher than the regulated outlet fluid

pressure.

Apply a pilot air signal to either the air high or air low

inlet port. The minimum air pressure depends on the

ratio. See the Performance Data on pages 17 and 18.

If using an accessory fluid pressure gauge, trigger the

air spray gun to relieve pressure in the line when

reducing the pressure, to ensure a correct gauge

reading.

This equipment stays pressurized until pressure is

manually relieved. To help prevent serious injury from

pressurized fluid, such as splashing fluid, follow the

Pressure Relief Procedure when you stop spraying

and before cleaning, checking, or servicing the

equipment.

Operation

3A0427D 9

Flush the Equipment • Flush before changing colors, at the end of the day,

before storing, and before repairing the equipment.

• Flush with a fluid that is compatible withthe fluid you

are pumping and with the wetted parts of your

system. Check with your fluid manufacturer or

supplier for recommended flushing fluids and

flushing frequency. Relieve the pressure after

flushing.

• Do not allow paint or solvent to sit in the system for

extended periods.

To avoid fire andexplosion, always ground equipment

and waste container. To avoid static sparking and

injury from splashing, always flush at the lowest

possible pressure.

Troubleshooting

10 3A0427D

Troubleshooting

Follow the Pressure Relief Procedure, page 8, before checking or repairing the equipment.

To repair the regulator, refer to Repair on page 11.

Problem Cause Solution

No fluid flow. Plugged fluid inlet. Flush fluid line and regulator.

Exhausted fluid supply. Check fluid supply and supply pump.

No air inlet pressure. Check air inlet pressure.

Ruptured air diaphragm (15). Replace. See page 11.

Ruptured fluid diaphragms (9a, 9b). Replace. See page 11.

Low fluid flow. Incorrect ratio. Use correct spacer (3) and ratio piston (14) for desired

ratio. See Change the Ratio, page 11.

Fluid supply pressure is too low. Increase fluid pressure. Do not exceed 300 psi (2.1

MPa, 21 bar).

Air inlet pressure is too low. Increase air inlet pressure.

High fluid flow. Incorrect ratio. Use correct spacer (3) and ratio piston (14) for desired

ratio. See Change the Ratio, page 11.

Air inlet pressure is too high. Decrease air inlet pressure.

Erratic fluid

flow. Damaged fluid diaphragms (9a, 9b). Replace. See page 11.

Ruptured air diaphragm (15). Replace. See page 11.

Ruptured fluid diaphragms (9a, 9b). Replace. See page 11.

Inconsistent air inlet pressure. Check air inlet pressure.

Inconsistent fluid inlet pressure. Check fluid inlet pressure.

Fluid flow will

not shut off. Dirty needle (6) and seat (5). Remove and clean. Replace if worn or damaged. See

page 11.

Inlet air is not shut off. Shut off inlet air.

Seat retainer (7) is loose. Tighten.

Broken spring (13). Replace spring (13). See page 11.

Regulator is

leaking fluid. Screws (17) are loose. Torque oppositely and alternately to 25 in-lb (2.8 N•m).

Ruptured fluid diaphragms (9a, 9b). Replace. See page 11.

Loose fluid fitting. Tighten.

Regulator is

leaking air. Loose air fitting. Tighten.

Screws (17) are loose. Torque oppositely and alternately to 25 in-lb (2.8 N•m).

Ruptured air diaphragm (15). Replace. See page 11.

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