Graco 233757 User Manual

Instructions/Parts List

Low Pressure

Fluid Regulators

Important Safety Instructions

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

309474K

Model 233757 Shown

II 2 G

Contents

List of Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Back Pressure Regulators . . . . . . . . . . . . . . . . . 6

Fluid Pressure Regulators . . . . . . . . . . . . . . . . . 6

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Flush Before First Use . . . . . . . . . . . . . . . . . . . 11

Pressure Relief Procedure . . . . . . . . . . . . . . . . 11

Adjusting the Regulator . . . . . . . . . . . . . . . . . . . 11

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Cleaning and Repair . . . . . . . . . . . . . . . . . . . . . 13

Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Mechanical Fluid Pressure Regulators

Part Nos. 233759 and 234267 . . . . . . . . . . 14

Mechanical Back Pressure Regulators

Part Nos. 233812 and 234258 . . . . . . . . . . 15

Manual Conventions

Mechanical Fluid Pressure Regulators

Part Nos. 233757, 233774, 234263, and

234273 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Mechanical Back Pressure Regulators

Part Nos. 233758, 233811, 233950, 234255,

234261, and 234262 . . . . . . . . . . . . . . . . . . 17

Pneumatic Fluid Pressure Regulators

Part Nos. 233773, 233809, 234272, and

234256 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Pneumatic Back Pressure Regulators

Part Nos. 233810 and 234257 . . . . . . . . . . 19

Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Accessory Gauges . . . . . . . . . . . . . . . . . . . . . . . . . 21

Flow Rate Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Mounting Dimensions . . . . . . . . . . . . . . . . . . . . . . 22

Graco Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Warning

WARNING

A warning alerts you to the possibility of serious injury or death if you do not follow the instructions.

Symbols, such as fire and explosion (shown above), alert you to a specific hazard and direct you to read the indicated hazard warnings (pages 4-5) for detailed information.

Caution

CAUTION

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

2 309474K

List of Models

Fluid Pressure Regulators

Part No. Series Model Type Maximum Fluid Inlet Pressure Regulated Pressure Range

233757 234263BB

233759 234267BB

233773 234272BB

233774 234273BB

233809 234256BB

Back Pressure Regulators

Part No. Series Model Type

233758 234262BB

233810 234257BB

233811 234255BB

233812 234258BB

233950 234261BB

P20-VM P20-VM npt

P50-VM P50-VM npt

P10-VP P10-VP npt

P10-VM P10-VM npt

P10-VP, OEM P10-VP, OEM npt

P10-RM P10-RM npt

P10-RP P10-RP npt

P20-RM DN13 P20-RM DN13 npt

P50-RM P50-RM npt

P20-RM DN1 P20-RM DN1 npt

Mechanical, fluid pressure

Pneumatic, fluid pressure

Mechanical, fluid pressure

Pneumatic, fluid pressure

Mechanical, back pressure

Pneumatic, back pressure

Mechanical, back pressure

580 psi (4000 kPa, 40 bar) 15-290 psi

(100-2000 kPa, 1-20 bar)

1015 psi (7000 kPa, 70 bar) 145-725 psi

(1000-5000 kPa, 10-50 bar)

580 psi (4000 kPa, 40 bar) 6-145 psi

(40-1000 kPa, 0.4-10 bar)

580 psi (4000 kPa, 40 bar) 15-145 psi

(100-1000 kPa, 1-10 bar)

580 psi (4000 kPa, 40 bar) 6-145 psi

40-1000 kPa, 0.4-10 bar)

Maximum Permanent Supply Pressure

145 psi (1000 kPa, 10 bar) 15-145 psi

290 psi (2000 kPa, 20 bar) 29-290 psi

725 psi (5000 kPa, 50 bar) 73-725 psi

290 psi (2000 kPa, 20 bar) 15-290 psi

Regulated Pressure Range

(100-1000 kPa, 1-10 bar)

(200-2000 kPa, 2-20 bar)

(500-5000 kPa, 5-50 bar)

(100-2000 kPa, 1-20 bar)

Key to Model Designation

Pressure regulation valve e.g. P20- R M DN13 npt

npt version

Valve Seat Orifice 13mm

Operating Mode P - pneumatic

M - mechanical

Action V - pressure regulation

R - back-pressure regulation

Regulation max 20 bar

309474K 3

Warning

WARNING

EQUIPMENT MISUSE HAZARD

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

• This equipment is for professional use only.

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

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

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

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

• Do not exceed the maximum working pressure of the lowest rated system component. Refer to the Technical Data on page 20 for the maximum working pressure of this equipment.

• Use fluids and solvents which are compatible with the equipment wetted parts. Refer to the Techni- cal Data section of all equipment manuals. Read the fluid and solvent manufacturer's warnings.

• 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).

• Wear hearing protection when operating this equipment.

• Never use 1,1, 1-trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or fluids containing such solvents in pressurized aluminum equipment. Such use could result in a chemical reaction, with the possibility of explosion.

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

4 309474K

Warning

WARNING

PRESSURIZED EQUIPMENT HAZARD

Spray from the gun, hose leaks, or ruptured components can splash fluid in the eyes or on the skin and cause serious injury.

• Do not point the gun at anyone or at any parts of the body.

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

•Follow the Pressure Relief Procedure on page 11 whenever you are instructed to relieve pressure; stop spraying; clean, check, or repair the equipment; and install or clean the spray nozzle.

• Tighten all fluid connections before operating the equipment.

• Check the hoses, tubes, and couplings daily. Replace worn, damaged, or loose parts immediately. Permanently coupled hoses cannot be repaired; replace the entire hose.

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.

• 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 hazardous fluid according to all local, state and national guidelines.

• Always wear protective eyewear, gloves, clothing and respirator as recommended by the fluid and solvent manufacturer.

309474K 5

Introduction

A fluid pressure regulator is used in air spray systems to ensure accurate, positive control of fluid pressure to an air spray gun or to a low pressure dispensing valve or atomizing head.

A regulator installed at a circulating line take-off or pump reduces main line pressure to maintain the desired fluid pressure to the air spray gun or to a low pressure dispensing valve or atomizing head.

Back Pressure Regulators

Models 233810, 233811, 233812, 233950, 234255, 234257, 234258, 233758, 234261, and 234262, are back pressure regulators that limit the supply pressure to a set value by opening an outlet and guiding back excess material when the predetermined pressure has been achieved. These valves are used in circulating systems. Model 233810 pneumatic back pressure regulator is shown in F

. 1.

Fluid Pressure Regulators

Models 233757, 233759, 233774, 234263, 234267, and 234273 (F sure regulators designed primarily for use with low to medium viscosity fluids.

Models 233773, 233809, 234256, and 234272 (F are pneumatically operated fluid pressure regulators designed primarily for use with highly viscous coatings.

. 2.) are mechanically operated fluid pres-

. 3.)

Fluid Inlet (from gun)

Fig. 1. Cutaway of Pneumatic Back Pressure Regulator

Air inlet

Valve plunger

TI1773A

Piston

Diaphragm

Fluid Outlet (return line)

6 309474K

Adjustment screw

Spring

Introduction

Fluid Inlet (from pump)

Valve ball and seat

TI1772A

Fig. 2. Cutaway of Mechanical Fluid Pressure Regulator

Valve plunger

Air inlet

Diaphragm

Fluid Outlet (to gun)

TI1772B

Fluid Inlet (from pump)

Diaphragm

Fluid Outlet (to gun)

Valve ball and seat

TI1771A

Valve plunger

TI1771B

Fig. 3. Cutaway of Pneumatic Fluid Pressure Regulator

309474K 7

Installation

1. Install one regulator for each spray gun.

2. Apply thread sealant to connections as necessary.

3. Make sure that the direction of fluid flow agrees with the flow direction markings on the regulator body.

a. Install a fluid pressure regulator

gun: Connect the fluid line from the pump to the inlet of the fluid regulator. Connect the fluid line to the gun to the regulator’s outlet.

upstream

of the

b. Install a back pressure regulator

the gun. Connect the fluid return line from the gun to the inlet of the back pressure regulator. Connect the fluid return line to the pump to the regulator’s outlet.

4. Flush and test the entire system.

. 4., FIG. 5., and FIG. 6. show possible configurations for installing a system. They do not depict actual system designs. Consult your Graco distributor for assistance in designing a system that meets your specific requirements.

Air to pump

downstream

Air to gun

Fluid

Fig. 4. Low pressure, non-circulating system, mechanical fluid regulator

Key

A Air line filter

B Bleed-type air shut-off valve

C Air regulator for pump and gun

DPump

E Fluid regulator

F Air spray gun

Y Pump ground wire

TI1767A

8 309474K

+ 16 hidden pages