Graco P20-VM Bedienungsanleitung

Instructions

Low Pressure

Fluid Regulators 309474U

For use in air-assisted spray systems to ensure accurate, positive control of fluid pressure

to a spray gun, low pressure dispensing valve, or atomizing head.

For professional use only.

Important Safety Instructions

Read all warnings and instructions in this manual.

Save these instructions.

Model 233757 Shown

II 2 G

2 309474U

Contents

Manual Conventions . . . . . . . . . . . . . . . . . . . . . . 2

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

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Back Pressure Regulators . . . . . . . . . . . . . . . . . 5

Fluid Pressure Regulators . . . . . . . . . . . . . . . . . 5

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Flush Before First Use . . . . . . . . . . . . . . . . . . . 10

Pressure Relief Procedure . . . . . . . . . . . . . . . . 10

Adjusting the Regulator . . . . . . . . . . . . . . . . . . . 10

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Cleaning and Repair . . . . . . . . . . . . . . . . . . . . . 12

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

Mechanical Fluid Pressure Regulators

Part Numbers 233759 and 234267 . . . . . . . 13

Mechanical Back Pressure Regulators

Part Numbers 233812 and 234258 . . . . . . . 14

Mechanical Fluid Pressure Regulators

Part Numbers 233757, 233774, 234263,

234273 and 17L324 . . . . . . . . . . . . . . . . . . 15

Mechanical Back Pressure Regulators

Part Numbers 233758, 233811, 233950,

234255, 234261, and 234262 . . . . . . . . . . . 16

Pneumatic Fluid Pressure Regulators

Part Numbers 233773, 233809, 234272, and

234256 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Pneumatic Back Pressure Regulators

Part Numbers 233810 and 234257 . . . . . . . 18

Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Accessory Gauges . . . . . . . . . . . . . . . . . . . . . . . . . 20

Flow Rate Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Mounting Dimensions . . . . . . . . . . . . . . . . . . . . . . 21

Graco Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Manual Conventions

Warning

Caution

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 4-4) for detailed

information.

CAUTION

A caution alerts you to the possibility of damage to or

destruction of equipment if you do not follow the

instructions.

List of Models

309474U 3

List of Models

17L324 is designed for water-based systems.

Key to Model Designation

Fluid Pressure Regulators

Part Series Model Type Maximum Fluid Inlet Pressure Regulated Pressure Range

233757

234263 B

BP20-VM

P20-VM npt Mechanical,

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

(100-2000 kPa, 1-20 bar)

17L324A P20-VM npt Mechanical,

fluid pressure 1500 psi (10.3 MPa, 103 bar) 15-290 psi (100-2000 kPa,

1-20 bar). Preset to 185 psi

(1275 kPa, 13 bar).

233759

234267 B

BP50-VM

P50-VM npt Mechanical,

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

(1000-5000 kPa, 10-50 bar)

233773

234272 B

BP10-VP

P10-VP npt Pneumatic,

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

(40-1000 kPa, 0.4-10 bar)

233774

234273 B

BP10-VM

P10-VM npt Mechanical,

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

(100-1000 kPa, 1-10 bar)

233809

234256 B

BP10-VP, OEM

P10-VP, OEM npt Pneumatic,

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

40-1000 kPa, 0.4-10 bar)

Back Pressure Regulators

Part Series Model Type Maximum Permanent Supply

Pressure Regulated Pressure Range

233758

234262 B

BP10-RM

P10-RM npt Mechanical,

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

(100-1000 kPa, 1-10 bar)

233810

234257 B

BP10-RP

P10-RP npt Pneumatic,

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

(100-1000 kPa, 1-10 bar)

233811

234255 B

BP20-RM DN13

P20-RM DN13 npt Mechanical,

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

(200-2000 kPa, 2-20 bar)

233812

234258 B

BP50-RM

P50-RM npt Mechanical,

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

(500-5000 kPa, 5-50 bar)

233950

234261 B

BP20-RM DN1

P20-RM DN1 npt Mechanical,

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

(100-2000 kPa, 1-20 bar)

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 pressure

Warning

4 309474U

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 19 for the maximum working pressure of this equipment.

• Use fluids and solvents which are compatible with the equipment wetted parts. Refer to the

Technical 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.

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 10 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.

Introduction

309474U 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 FIG. 1.

Fluid Pressure Regulators

Models 233757, 233759, 233774, 234263, 234267,

234273, and 17L324 (FIG. 2.) are mechanically

operated fluid pressure regulators designed primarily for

use with low to medium viscosity fluids.

Models 233773, 233809, 234256, and 234272 (FIG. 3.)

are pneumatically operated fluid pressure regulators

designed primarily for use with highly viscous coatings.

Fig. 1. Cutaway of Pneumatic Back Pressure Regulator

TI1773A

Piston

Valve plunger

Fluid Outlet

(return line)

Air inlet

Fluid Inlet

(from gun) Diaphragm

Introduction

6 309474U

Fig. 2. Cutaway of Mechanical Fluid Pressure Regulator

Fig. 3. Cutaway of Pneumatic Fluid Pressure Regulator

TI1772A

Spring

Valve plunger

Fluid Outlet

(to gun)

Adjustment screw

Fluid Inlet

(from pump)

Diaphragm

Valve ball and seat

TI1772B

TI1771A

Valve plunger

Fluid Outlet

(to gun)

Air inlet

Fluid Inlet

(from pump) Diaphragm

Valve ball and seat

TI1771B

Installation

309474U 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 upstream of the

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.

b. Install a back pressure regulator downstream of

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.

FIG. 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.

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

Key

Fluid

Air to gun

Air to pump

TI1767A

A Air line filter

B Bleed-type air shut-off valve

C Air regulator for pump and gun

D Pump

E Fluid regulator

F Air spray gun

Y Pump ground wire

Installation

8 309474U

Fig. 5. Low pressure, non-circulating system, pneumatic fluid regulator

Key

Air to Fluid

Regulator

Air to

Gun

Air to

Pump

Fluid

BAB

TI1766A

A Air line filter

B Bleed-type air shut-off valve

C Air regulator for pump and gun

D Pump

E Fluid regulator

F Air spray gun

G Air regulator for fluid regulator

Y Pump ground wire

Installation

309474U 9

Fig. 6. Low Pressure circulating system, pneumatic fluid regulator and back pressure regulator

Key

Air to

gun

Fluid

to gun

Air to Fluid

Regulator Air to Back

Pressure

Regulator

Fluid return from gun

Fluid

Air

TI1768A

A Air line filter

B Bleed-type air shut-off valve

C Air regulator for pump and gun

E Fluid regulator

F Air spray gun

G Air regulator for fluid regulator

H Fluid shutoff valve

J Back pressure regulator

K Air regulator for back pressure regulator

Y Pump ground wire

Operation

10 309474U

Operation

Flush Before First Use

Your pressure regulator has been tested in the factory

with an anti-corrosion liquid. Before using the regulator,

thoroughly flush the system with a solvent to remove

residue of this liquid as well as any contaminants that

have been introduced during assembly of the system.

Pressure Relief Procedure

1. Shut off the air to the pump.

2. Trigger the air spray gun to relieve the fluid

pressure.

3. Open the fluid drain valve to relieve all fluid

pressure, having a container ready to catch the

drainage.

Adjusting the Regulator

The fluid pressure regulator controls pressure

downstream from its outlet. The inlet fluid pressure

should always be higher than the outlet fluid pressure.

If you are 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.

Adjust the pump air pressure and the fluid pressure

regulator for the best spraying combination.

In a circulating system, the back pressure valve controls

the fluid pressure upstream of its inlet in the same way.

Mechanical Regulator

1. Back out the adjustment screw until there is no

spring pressure.

2. Turn on the fluid supply, to admit fluid to the

regulator.

3. Turn the screw clockwise to adjust fluid pressure to

the desired level.

Pneumatic Regulator

1. With the fluid supply shut off, turn on the air

pressure to the regulator.

2. Turn on the fluid supply, to admit fluid to the

regulator.

3. Increase the fluid inlet pressure. When the fluid

outlet pressure is at the desired level, shut off the air

to the fluid regulator.

WARNING

Read the warnings on page 4, and follow the Pressure

Relief Procedure below whenever you:

• are instructed to relieve pressure

• stop spraying

• check or service any of the equipment

• install or clean the fluid nozzle.

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