Graco 3A0427B User Manual

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)

3A0427B

Part No. 24C375, Series A

1:1 Ratio, 90 psi (0.63 MPa, 6.3 bar) Maximum Regulated Fluid Pressure (Low Pressure Port)

Part No. 24E471, Series A

1:2 Ratio, 50 psi (0.35 MPa, 3.5 bar) Maximum Regulated Fluid Pressure (Low Pressure Port)

Part No. 24E472, Series A

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. Save these instructions.

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Warnings

Contents

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Mount the Fluid Regulator . . . . . . . . . . . . . . . . . . 4

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Air Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Fluid Inlet Line . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Regulated Fluid Outlet Line . . . . . . . . . . . . . . . . 4

Flush Before Using Equipment . . . . . . . . . . . . . . 4

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Pressure Relief Procedure . . . . . . . . . . . . . . . . . 7

Available Pressures . . . . . . . . . . . . . . . . . . . . . . 7

High Port Operation . . . . . . . . . . . . . . . . . . . . . . 7

Low Port Operation . . . . . . . . . . . . . . . . . . . . . . . 7

Adjust the Fluid Regulator . . . . . . . . . . . . . . . . . . 7

Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Change the Ratio . . . . . . . . . . . . . . . . . . . . . . . . 10

Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . 16

Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 18

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, 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

WARNINGWARNINGWARNING

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.

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Warnings

WARNING

WARNINGWARNINGWARNING

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 the Pressure Relief Procedure 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.

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 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.

• 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 MSDSs 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

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, hearing loss, inhalation of toxic fumes, and burns. This 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.

3A0427B 3

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 14 for mounting information.

Grounding

The equipment must be grounded. 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 F

. 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.

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 Flushing, page 7.

Connections can be made in two ways:

• Use separate high (A) and low (B) air pressure supply lines, connected as shown in F

• Use a single air supply line and connect it to the high or low pressure air inlet fitting alternately, as desired.

. 1.

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 F

. 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.

4 3A0427B

Pilot air signals from a manual air regulator or electronic air control

Installation

To fluid dispense point

From fluid supply

FIG. 1: Typical Installation

Key:

A Air Supply Line to High Port B Air Supply Line to Low 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)

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3A0427B 5

Installation

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