Graco 244731 Operation manual

Graco Inc. P.O. Box 1441 Minneapolis, MN 55440-1441

309361F

Instructions - Parts List

Pressure Cups

Part No. 244731, Series A, 1 Quart Size

20 psi (0.14 MPa, 1.4 bar) Maximum Working Fluid Pressure

Part No. 287301, Series A, 2 Quart Size

50 psi (0.35 MPa, 3.5 bar) Maximum Working Fluid Pressure

Part No.

244731

ti1640c

Part No.

287301

PreparationforOperation

2 309361F

Preparation for Operation

Prepare the paint or other coating according to the man-

ufacturer’s instructions. Strain the paint through a fine

nylon mesh bag, available at paint dealers. Fill the cup

(A) with paint and fasten the lid securely.

Connect the air (E) and fluid (D) hoses as shown in FIG.

1. On electrostatic guns, connect the air hose ground

wire (F) to a true earth ground.

Measure the resistance between the gun air inlet fitting

and a true earth ground. The resistance must be less

than 1 megohm.

WARNING

Halogenated Hydrocarbon Hazard

Never use 1, 1, 1-trichloroethane, methylene chlo-

ride, other halogenated hydrocarbon solvents or flu-

ids containing such solvents in this equipment. Such

use could result in a serious chemical reaction, with

the possibility of explosion, which could cause death,

serious injury, and/or substantial property damage.

Consult your fluid suppliers to ensure that the fluids

being used are compatible with aluminum parts.

WARNING

Fire, Explosion, and Electric Shock Hazard

When using the pressure cup with an elec-

trostatic spray gun, connect the Graco

Grounded Air Supply Hose between the

gun air fitting on the pressure cup and the

gun's air inlet. The electrostatic gun air inlet

has a left-hand thread. Connect the air sup-

ply hose ground wire to a true earth ground.

Preparation for Operation

309361F 3

Key

Fig. 1. Typical Installation

A Pressure Cup

BMainAirInlet

C Fluid Outlet

D Fluid Hose

EAir Hose (for electrostatic guns use the

grounded air hose shown)

FAir Hose Ground Wire (used on electrostatic

guns only)

G Air Spray Gun (electrostatic gun shown)

4 Gun Air Regulator

6 Cup Air Regulator

ti1642c

One Quart Pressure Cup Two Quart Pressure Cup

TI1638b

Operation

4 309361F

Operation

One Quart Pressure Cup

Pressure Relief Procedure

1. On electrostatic guns only, turn the ES ON/OFF

valve OFF.

2. Turn off the gun air regulator (4) and the cup air reg-

ulator (6).

3. Trigger the gun into a grounded metal waste con-

tainer to relieve the fluid pressure.

4. Place the cup on a table and slowly release the

clamp lever (3b) to bleed off pressure in the cup. Be

sure to return the clamp lever to the locked position

before turning the gun regulator on again.

Daily Setup

1. Fill the cup (2) with fluid. Fasten the lid (3) securely.

2. Turn on the main air supply.

3. Set the gun air regulator (4) to 40 psi (0.28 MPa, 2.8

bar) while spraying. Push the knob in to lock the reg-

ulator, pull out to unlock.

4. Set the cup air regulator (6) to 10 psi (.07 MPa, 0.7

bar). Push the knob in to lock the regulator, pull out

to unlock.

5. Spray a test panel. If the paint is not fully atomized,

either decrease the fluid pressure using the cup air

regulator or increase the setting of the gun air regu-

lator.

To decrease the cup fluid pressure, turn the cup air

regulator knob counterclockwise incrementally until

you get the desired results.

Always use the lowest possible pressure needed to

achieve the desired results.

WARNING

Pressurized Equipment Hazard

To reduce the risk of over-pressurizing the

equipment, which could cause serious

injury including splashing fluid in the eyes or

on the skin, never exceed 20 psi (0.14 MPa, 1.4 bar)

air pressure to the cup. The safety valve (9) is preset

to relieve pressure at 20 psi (0.14 MPa, 1.4 bar). Do

not alter the safety valve.

WARNING

Pressurized Equipment Hazard

The system pressure must be manually

relieved to prevent the equipment from

starting or spraying accidentally. To reduce

the risk of an injury from accidental spray from the

gun or splashing fluid, follow the Pressure Relief

Procedure whenever you:

•are instructed to relieve the pressure

•stop spraying

•check or service any of the system equipment

•or disconnect any of the system equipment.

Operation

309361F 5

Operation

Two Quart Pressure Cup

Pressure Relief Procedure

1. On electrostatic guns only, turn the ES ON/OFF

valve OFF.

2. Turn off the gun air regulator (2) and the cup air reg-

ulator (10).

3. Open the pressure relief valve all the way (counter-

clockwise) to bleed off pressure in the cup.

4. Trigger the gun into a grounded metal waste con-

tainer to relieve the fluid pressure.

5. Place the cup on a table and slowly unscrew the lid.

Daily Setup

1. Fill the cup (1) with fluid. Fasten the lid securely.

2. Turn on the main air supply.

3. Turn the pressure relief valve fully clockwise.

4. Set the gun air regulator (2) to 40 psi (0.28 MPa, 2.8

bar) while spraying. Push the knob in to lock the reg-

ulator, pull out to unlock.

5. Set the cup air regulator (10) to 10 psi (.07 MPa, 0.7

bar). Push the knob in to lock the regulator, pull out

to unlock.

6. Spray a test panel. If the paint is not fully atomized,

either decrease the fluid pressure using the cup air

regulator or increase the setting of the gun air regu-

lator.

To decrease the cup fluid pressure, turn the cup air

regulator knob counterclockwise incrementally until

you get the desired results.

Always use the lowest possible pressure needed to

achieve the desired results.

WARNING

Pressurized Equipment Hazard

To reduce the risk of over-pressurizing the

equipment, which could cause serious

injury including splashing fluid in the eyes or

on the skin, never exceed 50 psi (0.35 MPa, 3.5 bar)

air pressure to the cup. The safety valve (9) is preset

to relieve pressure at 50 psi (0.35 MPa, 3.5 bar). Do

not alter the safety valve.

WARNING

Pressurized Equipment Hazard

The system pressure must be manually

relieved to prevent the equipment from

starting or spraying accidentally. To reduce

the risk of an injury from accidental spray from the

gun or splashing fluid, follow the Pressure Relief

Procedure whenever you:

•are instructed to relieve the pressure

•stop spraying

•check or service any of the system equipment

•or disconnect any of the system equipment.

Cleaning

6 309361F

Cleaning

One Quart Pressure Cup

1. Relieve the pressure, page 4.

2. Push the clamp lever (3b) to the unclamped posi-

tion, against the yoke. See FIG. 2.

3. Twist the lid counterclockwise to disengage it.

Remove the lid.

4. Clean the lid and the cup, using a compatible sol-

vent.

5. Fill the cup with clean solvent and replace the lid.

6. Set the cup air regulator at 10 psi (.07 MPa, 0.7 bar)

and spray into a waste container until clean solvent

comes from the gun.

7. Relieve the pressure.

8. Remove the solvent from the cup and wipe the

equipment with a solvent dampened rag.

9. Assemble the empty cup and set the cup air regula-

tor to 10 psi (.07 MPa, 0.7 bar). Spray the gun into a

waste container until all the solvent is purged.

10. Relieve the pressure.

Fig. 2: One Quart Pressure Cup

CAUTION

To avoid damage to the air regulator diaphragms, do

not clean the air regulators in a gun washer or use

any cleaning method which allows solvent to enter

the regulator.

CAUTION

To avoid swelling of the gasket (3g), do not soak the

gasket or expose it to solvent for a prolonged period

when cleaning the pressure cup lid. 3b

TI1637b

Cleaning

309361F 7

Cleaning

Two Quart Pressure Cup

1. Relieve the pressure, page 4. On electrostatic guns,

turn the ES ON/OFF valve OFF.

2. Empty the paint from the cup and clean the cup and

lid with a compatible solvent.

3. Inspect the lid gasket. Replace if damaged.

When replacing the gasket, remove the old adhesive

from inside the lid. Apply new adhesive (3M #847

Scotch-Grip®or equivalent) to the lid when installing the

new gasket.

4. Fill the cup with clean solvent, replace the lid, and

close the pressure relief valve (a). See FIG. 3.

5. Set the cup air regulator at 10 psi (.07 MPa, 0.7 bar)

and spray into a waste container until clean solvent

comes from the gun.

6. Relieve the pressure.

7. Remove the solvent from the cup and wipe the

equipment with a solvent dampened rag.

8. Assemble the empty cup and set the cup air regula-

tor to 10 psi (.07 MPa, 0.7 bar). Spray the gun into a

waste container until all the solvent is purged.

9. Relieve the pressure.

Fig. 3: Two Quart Pressure Cup

CAUTION

To avoid damage to the air regulator diaphragms, do

not clean the air regulators in a gun washer or use

any cleaning method which allows solvent to enter

the regulator.

CAUTION

To avoid swelling of the gasket, do not soak the gas-

ket or expose it to solvent for a prolonged period

when cleaning the pressure cup lid.

ti1640c

TI1641b

Parts

8 309361F

Parts

Part No. 244731 Pressure Cup (1 Quart)

3k 15

23 10

TI1639b

Parts

309361F 9

Technical Data (Model 244731)

Scotch-Grip® is a registered trademark of the 3M Company.

Ref.

No. Part No. Description Qty

1 245345 CUP, pressure;

includes items 2 and 3 1

2 239727 . CUP, bare 1

3 245344 . LID; includes items 3a-3m 1

3a 190170 . . LID, bare 1

3b 276499 . . LEVER, clamp 1

3c 192330 . . YOKE, lid 1

3d 189909 . . SEAT 1

3e 112781 . . ELBOW, swivel 1

3f 189882 . . TUBE, fluid 1

3g 189883 . . GASKET, lid 1

3h 190033 . . NUT, adapter union 1

3j 190375 . . SLEEVE, cup 1

3k 154628 . . WASHER 1

3m 116947 . . WASHER, wave 2

4 111804 REGULATOR, air, gun 1

5 108190 GAUGE, pressure, air, gun 1

6 116904 REGULATOR, air, pressure cup 1

7 111500 GAUGE, pressure, air, cup 1

8 110440 TEE 1

9 112059 VALVE, safety 1

10 189557 RESTRICTOR, air 1

11 112698 ELBOW 3

12 104008 WASHER, lock 1

13 183696 TEE 1

14 156971 NIPPLE 1

15 M71256 VALVE, check 1

16 172682 ADAPTER, hose 1

17 112788 SCREW, cap, socket hd 4

18 198784 BRACKET 1

19 172680 ELBOW 1

20 172620 HANDLE 1

21 100188 NUT, hex 1

22 054720 TUBE, polyurethane;

1/4 in. (6 mm) OD 10 in.

23 117243 ADAPTER, hex pipe 1

Ref.

No. Part No. Description Qty

Category Data

Maximum Working Fluid Pressure 20 psi (0.14 MPa, 1.4 bar)

Air inlet fitting 1/4 npt(m)

Diameter 5.25 in. (133 mm)

Overall Height 17.75 in. (451 mm)

Weight 4 lb (1.8 kg)

Wetted Parts Nylon, Aluminum, Polyethylene, Stainless Steel

Parts

10 309361F

Part No. 287301 Pressure Cup (2 Quart)

832

ti1643d

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