Graco 306860N User Manual

Instructions–Parts List

HIGH PRESSURE

306860N

Back Pressure Regulator

For use in a high pressure spray circulating system to regulate back pressure
to gun(s) and maintain proper pressure for circulation. For professional use
only.

Not approved for use in European explosive atmosphere locations.

CARBON STEEL REGULATORS

Part No. 206819, Series F

3000 psi (21 MPa, 207 bar) Maximum Working Pressure
1000–3000 psi (7–21 MPa, 70–207 bar)
Regulated Fluid Pressure Range

ENG

Part No. 222405, Series B

3000 psi (21 MPa, 207 bar) Maximum Working Pressure
0–1000 psi (0–7 MPa, 0–70 bar)
Regulated Fluid Pressure Range

STAINLESS STEEL REGULATOR

Part No. 238926, Series A

3000 psi (21 MPa, 207 bar) Maximum Working Pressure
1000–3000 psi (7–21 MPa, 70–207 bar)
Regulated Fluid Pressure Range

Important Safety Instructions

Read all warnings and instructions in this manual.
Save these instructions.

Table of Contents

Symbols 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

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

Maintenance 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Accessories 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Technical Data 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Warranty 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Graco Phone Number 12. . . . . . . . . . . . . . . . . . . . . . . . . .

06863

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 or malfunction and result in serious injury.

INSTRUCTIONS

D This equipment is for professional use only.

D Read all instruction manuals, tags, and labels before operating the equipment.

D Use the equipment only for its intended purpose. If you are not sure, call your Graco distributor.

D Do not alter or modify this equipment.

D Check equipment daily. Repair or replace worn or damaged parts immediately.

Caution Symbol

CAUTION

This symbol alerts you to the possibility of damage to
or destruction of equipment if you do not follow the
instructions.

D Do not exceed the maximum working pressure of the lowest rated system component. Refer to the

Technical Data on page 11 for the maximum working pressure of this equipment.

D Use fluids and solvents which are compatible with the equipment wetted parts. Refer to the Tech-

nical Data section of all equipment manuals. Read the fluid and solvent manufacturer’s warnings.

D Route hoses away from traffic areas, sharp edges, moving parts, and hot surfaces. Do not expose

Graco hoses to temperatures above 180_F (82_C) or below –40_F (–40_C).

D Wear hearing protection when operating this equipment.

D Do not lift pressurized equipment.

D Comply with all applicable local, state, and national fire, electrical, and safety regulations.

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WARNING

INJECTION HAZARD

Spray from the gun, leaks or ruptured components can inject fluid into your body and cause extremely
serious injury, including the need for amputation. Fluid splashed in the eyes or on the skin can also
cause serious injury.

D Fluid injected into the skin might look like just a cut, but it is a serious injury. Get immediate medi-

cal attention.

D Do not stop or deflect leaks with your hand, body, glove or rag.

D Keep your hands away from the end of the drain valve when opening it.

D Lock the gun trigger safety when you stop spraying.

D Follow the Pressure Relief Procedure on page 7 if the spray tip clogs and before cleaning,

checking or servicing the equipment.

D Follow the Pressure Relief Procedure on page 7 before removing the regulator’s adjusting knob.

D Do not pressurize the system when the back pressure regulator’s adjusting knob is removed.

D Tighten all fluid connections before operating the equipment.

D Check the hoses, tubes, and couplings daily. Replace worn or damaged parts immediately.

Do not repair high pressure couplings; you must replace the entire hose.

D Use only Graco approved hoses. Do not remove the spring guard that is used to help protect the

hose from rupture caused by kinks or bends near the couplings.

TOXIC FLUID HAZARD

Hazardous fluid or toxic fumes can cause serious injury or death if splashed in the eyes or on the skin,
inhaled, or swallowed.

D Know the specific hazards of the fluid you are using.

D Store hazardous fluid in an approved container. Dispose of hazardous fluid according to all local,

state and national guidelines.

D Always wear protective eyewear, gloves, clothing and respirator as recommended by the fluid and

solvent manufacturer.

306860 3

Installation

The Typical Installations shown in Figs. 1 and 2 are
only guides in designing a system. For assistance in
designing a system to meet your needs, contact your
Graco distributor.

Installing the Back Pressure Regulator

1. Install the back pressure regulator (A) in the spray
gun return line (D). See Figs. 1 and 2.

2. Connect fluid lines to the 1/4 npt(f) inlet and outlets
of choice. Make sure the fluid flow agrees with the
IN and OUT markings on the regulator housing.

3. Install the accessory gauge, if used, in the optional
inlet.

4. If more than one spray station is used, install a
back pressure regulator (A) in the circulating line
(H) after the last spray station to maintain proper
system pressures. Refer to Fig. 2, for multiple
circulating spray stations.

NOTE: The two 1/4–20 tapped mounting holes on the
side of the regulator housing are for mounting the
regulator when flexible fluid lines are used.

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