Graco 310537C User Manual

Instructions–Parts List

STAINLESS STEEL, WATERBASE COMPATIBLE

310537C

Back Pressure Valve

Used with abrasive fluids in circulating systems to provide regulated back pressure to the spray gun(s) and to maintain proper circulating pressure throughout the system. For professional use only.

Important Safety Instructions

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

300 psi (2.1 MPa, 21 bar) Maximum Inlet Pressure 200 psi (1.4 MPa, 14 bar) Maximum Regulated Pressure

Model 916154

Stainless Steel Back Pressure Valve, with carbide wear parts, for use with abrasive fluids

Table of Contents

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

Installation 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operation 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Dimensions 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Technical Data 7. . . . . . . . . . . . . . . . . . . . . . . . . .

Graco Standard Warranty 8. . . . . . . . . . . . . . . .

8717A

Graco Information 8. . . . . . . . . . . . . . . . . . . . . . .

INSTRUCTIONS

WARNING

EQUIPMENT MISUSE HAZARD

Equipment misuse can cause the equipment to rupture, malfunction, or start unexpectedly and result in serious injury.

D This equipment is for professional use only.

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

D Use the equipment only for its intended purpose. If you are uncertain about usage, call your Graco

distributor.

D Do not alter or modify this equipment. Use only genuine Graco parts and accessories.

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

D Do not exceed the maximum working pressure of the lowest rated system component. The maxi-

mum inlet pressure of this equipment is 300 psi (2.1 MPa, 21 bar). See the Technical Data on page 7.

D Follow the Pressure Relief Procedure on page 4 if the spray tip clogs and before cleaning,

checking or servicing the equipment.

D Route hoses aaway from traffic areas, sharp edges, moving parts, and hot surfaces.

D Do not expose Graco standard hoses to temperatures above 180_F (82_C) or below –40_F

(–40_C).

D Do not use the hoses to pull the equipment.

D Use only fluids and solvents that are compatible with the equipment wetted parts. See the Techni-

cal Data sections of all the equipment manuals. Read the fluid manufacturer’s warnings.

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

solvent manufacturers.

D Wear hearing protection when operating this equipment.

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

2 310537

KEY

A Fluid Supply Line B Air Spray Gun C Fluid Pressure Regulator D Air Supply Line

Installation

E Adjusting Screw F Back Pressure Valve G Fluid Return Line

Fig. 1

CAUTION

Handle the back pressure valve with care to avoid damaging the diaphragm.

Connect the line to the 1-1/4 in. npt(f) inlet and outlet. Make sure the flow direction agrees with the IN and OUT markings on the valve body.

The back pressure valve is adjustable to control the fluid pressures in a circulating system from 5 to 200 psi (0.3 to 14 bar, 0.03 to 1.4 MPa).

8719A

Installing the Back Pressure Valve

Install the back pressure valve in the spray gun return line. See Fig. 1.

Operation

NOTE: The back pressure valve controls pressure

ahead of its intake. Turn the adjusting screw clockwise to increase pres-

sure and counterclockwise to decrease pressure. Adjust the pump pressure and back pressure valve for

the best spraying combination and for proper circulation of fluid.

If more than one spray station is used, install the back pressure valve in the fluid supply line after the last station. This will help maintain proper circulating pressures in the system.

Flush the back pressure valve with a compatible solvent whenever the rest of the system or unit is being flushed. Open the back pressure valve before flushing by turning the screw counterclockwise.

310537 3

+ 5 hidden pages