Graco 15X303 Technical reference manual

312782J

Instructions-Parts

Air Actuated

Dispense Valve

To dispense plural component fluids and solvents. For professional use only.

Part No. 15X303, 26A355

High Pressure Dispense Valve

3000 psi (21 MPa, 207 bar) Maximum Fluid Working Pressure

100 psi (0.7 MPa, 7 bar) Maximum Air Working Pressure

Part No. 24T785

High Pressure Dispense Valve for Acid Catalyzed Materials

3000 psi (21 MPa, 207 bar) Maximum Fluid Working Pressure

100 psi (0.7 MPa, 7 bar) Maximum Air Working Pressure

Part No. 26A313

High Pressure Dump Valve for Acid Catalyzed Materials

3000 psi (21 MPa, 207 bar) Maximum Fluid Woriking Pressure

100 psi (0.7 MPa, 7 bar) Maximum Air Working Pressure

Part No. 15X304

Low Pressure Dispense Valve

300 psi (2.1 MPa, 21.0 bar) Maximum Fluid Working Pressure

100 psi (0.7 MPa, 7 bar) Maximum Air Working Pressure

Important Safety Instructions

Read all warnings and instructions in this manual. For complete

warnings and instructions see your proportioning system manual.

Hazard symbols refer to specific procedure risks. Save all instruc-

tions.

Low Pressure Valve

TI11581A

High Pressure Valves

TI11663A

ti30189a

15X304

26A313

15X303, 24T785,

and 26A355

Related Manuals

2312782J

Contents

Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

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

Connect the Air Lines . . . . . . . . . . . . . . . . . . . . . 3

Connect the Fluid Lines . . . . . . . . . . . . . . . . . . . 3

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Typical Installation . . . . . . . . . . . . . . . . . . . . . . . 5

System Pneumatic Schematic (used with

ProMix 2KS) . . . . . . . . . . . . . . . . . . . . . . . . . 6

Operation (ProMix 2KS Only) . . . . . . . . . . . . . . . . . 7

Settings and Adjustments . . . . . . . . . . . . . . . . . . 7

Pressure Relief Procedure . . . . . . . . . . . . . . . . . 7

Operation (ProMix PD2K Only) . . . . . . . . . . . . . . . . 7

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Clean the Dispense Valve Daily . . . . . . . . . . . . . 7

Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

15X303 and 26A355 High Pressure Valve . . . . 10

24T785 High Pressure Valve for Acid

Catalyzed Materials . . . . . . . . . . . . . . . . . . 11

26A313 High Pressure Dump Valve for Acid

Catalyzed Materials . . . . . . . . . . . . . . . . . . 12

15X304 Low Pressure Valve . . . . . . . . . . . . . . . 13

Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 16

Graco Information . . . . . . . . . . . . . . . . . . . . . . . . 16

Related Manuals

See the following manuals for additional information on

the dispense valves.

Manual Description

312775 ProMix 2KS Manual System Installation

312776 ProMix 2KS Manual System Operation

312777 ProMix 2KS Manual System Repair-Parts

312778 ProMix 2KS Automatic System Installation

312779 ProMix 2KS Automatic System Operation

312780 ProMix 2KS Automatic System

Repair-Parts

332457 ProMix PD2K Manual System with

Advanced Display Module Installation

332562 ProMix PD2K Manual System with

Advanced Display Module Operation

3A2800 ProMix PD2K Manual System with

Advanced Display Module Repair-Parts

332339 ProMix PD2K Dosing Pumps

312781 Fluid Mix Manifold

312783 Color and Catalyst Change Valve Stacks

312786 ProMix 2KS Dump Valve and Third Purge

Valve Kits

312787 Color Change Module Kits for ProMix 2KS

or ProMix 3KS Electronic Proportioners

332455 Color Change Kits for ProMix PD2K Elec-

tronic Proportioners

312782 Dispense Valve

Installation

312782J 3

Installation

FIG. 2 shows the dispense valves installed in an elec-

tronic 2-component proportioning system. In this exam-

ple, the dispense valves are used as dose valves for

components A and B (DVA, DVB), an air purge valve

(APV), and a solvent purge valve (SPV).

FIG. 3 shows a pneumatic schematic of a complete

2-component proportioning system, in which the dis-

pense valves are also used as A and B dump valves,

and color change valves.

NOTE: See manual 332339 for instructions on how to

install the dispense valves in a ProMix PD2K Electronic

Positive Displacement Proportioning System.

Connect the Air Lines

Clean all lines and connections of dirt, burrs, etc., and

blow them out with clean air before connecting them to

the system. The air supply line should contain an air fil-

ter to remove harmful dirt and moisture from the com-

pressed air.

Use a normally closed 4-way air solenoid valve to con-

trol the dispense valve. Attach 5/32 in. (4 mm) OD air

supply lines from the 4-way valve to the air inlets of the

dispense valve.

Connect the Fluid Lines

Connect a grounded fluid line from the pump or meter to

the 1/4 npt fluid inlet of the dispense valve adapter.

If fluid is supplied by a pump, install a fluid pressure reg-

ulator upstream of the dispense valve. A fluid regulator

enables you to control fluid pressure more accurately

than by regulating air pressure to the pump.

Install a fluid filter to remove particles and sediment

which may clog the nozzle.

Accessories

Two accessories are required in your system: a

bleed-type master air valve and a fluid drain valve.

These accessories help reduce the risk of serious injury

including fluid injection, splashing in the eyes or on the

skin, and injury from moving parts if you are adjusting or

repairing the pump.

The bleed-type master air valve is required only with

air-powered pumps. It relieves air trapped between this

valve and the pump after the air regulator is shut off.

Trapped air can cause the pump to cycle unexpectedly.

Locate the valve close to the pump.

The fluid drain valve helps relieve fluid pressure in the

displacement pump, hose, and dispense valve; trigger-

ing the valve to relieve pressure may not be sufficient.

Grounding

To reduce the risk of static sparking, ground the pump

and all other components used or located in the dis-

pensing area. Check your local electrical code for

detailed instructions for your area and type of equipment

and be sure to ground all of these components.

•Fluid hoses: use only electrically conductive hoses

with a maximum of 500 feet (150 m) combined hose

length to ensure grounding continuity.

•Dispense valve: obtain grounding through connec-

tion to a properly grounded fluid hose and pump.

Installation

4312782J

Components

FIG. 1. Valve Air Ports

TI11663A

TI11581A

15X303, 24T785, and 26A355 High Pressure

Dispense Valves

26A313 High Pressure

Dump Valve

5/32 in. (4 mm) OD air tube

fitting, to close

5/32 in. (4 mm) OD air tube

fitting, to open 5/32 in. (4 mm) OD air tube

fitting, to open

Vent port

Optional air

open port

Valve position

sight port

Seal weep port

and Lubrication

Cup connection

TI31156A

15X304 Low Pressure

Dispense Valve

Actuation indicator

5/32 in. (4 mm) OD air tube

fitting, to open

Valve position

sight port

Seal weep port

and Lubrication

Cup connection

Optional air

open port

Installation

312782J 5

Typical Installation

Key:

MA Component A Meter

DVA Component A Dose Valve

MB Component B Meter

DVB Component B Dose Valve

MS Solvent Meter

SPV Solvent Purge Valve

APV Air Purge Valve

ASL Component A Supply Line

BSL Component B Supply Line

APL Air Purge Line

SPL Solvent Purge Line

FIG. 2: Typical Installation

TI12556a

DVB

SPV

DVA

APV

APL SPL

BSLASL

Installation

6312782J

System Pneumatic Schematic (used with ProMix 2KS)

FIG. 3. System Pneumatic Schematic

3/8 AIR FILTER

MANUAL DRAIN

5 MICRON

WALL MOUNT ONLY

FLUSH AIR TO FLUID INLET 1/4 TUBE

TO MANIFOLD 1/4 TUBE

4-WAY SOLENOID

12 VDC

PURGE A

VALVE

DUMP A

VALVE

(OPTIONAL)

4-WAY SOLENOID

12 VDC

3-WAY SOLENOID

12 VDC

3-WAY SOLENOID

12 VDC

MANIFOLD

AIR EXHAUST MUFFLER

OPEN

5/32 TUBE

PURGE B

VALVE

4-WAY SOLENOID

12 VDC

OPEN

5/32 TUBE

DUMP B

VALVE

(OPTIONAL)

4-WAY SOLENOID

12 VDC

OPEN

5/32 TUBE

DOSE A

VALVE

OPEN

5/32 TUBE

DOSE B

VALVE

OPEN

5/32 TUBE

3-WAY SOLENOID

12 VDC

GFB 1

VALVE

(OPTIONAL)

5/32 TUBE

COLOR 1

COLOR 2

COLOR 3

COLOR 4

COLOR 5

COLOR 6

COLOR 7

COLOR 8

COLOR SOLVENT

COLOR 9

COLOR 10

COLOR 11

COLOR 12

CATALYST 1

CATALYST 2

CATALYST 3

CATALYST 4

CATALYST SOLVENT

COLOR

CHANGE

CONTROL

COLOR

VALVE

STACKS

MAC

36 SERIES SOLENOID VALVES

COLOR 13

COLOR 14

COLOR 15

COLOR 16

COLOR 17

COLOR 18

COLOR 19

COLOR 20

COLOR 21

COLOR 22

COLOR 23

COLOR 24

COLOR 25

COLOR 26

COLOR 27

COLOR 28

COLOR 29

COLOR 30

PURGE C

VALVE

(OPTIONAL)

12 VDC

OPEN

5/32 TUBE

AIR EXHAUST MUFFLER

3-WAY SOLENOID

12 VDC

GFB 2

VALVE

(OPTIONAL)

OPEN

5/32 TUBE

OPEN

MANIFOLD

PURGE AIR

CONTROL AIR

Operation (ProMix 2KS Only)

312782J 7

Operation (ProMix 2KS

Only)

Settings and Adjustments

Set the actuating air to at least 75 psi (0.52 MPa, 5.2

bar) and start the pump. Adjust the pump speed and

pressure to obtain the desired flow rate. Always use the

lowest pump speed necessary to get the results you

want.

To decrease needle travel, turn the cap (11, see pages

10, 11, and 13) clockwise; to increase, turn counter-

clockwise. The valve is factory set at one open turn. The

maximum setting is four turns open.

Pressure Relief Procedure

1. Shut off the fluid supply to the dispense valve.

2. Actuate the dispense valve to relieve fluid pressure

in the valve.

3. Relieve fluid pressure upstream and downstream of

the dispense valve. See your system operation

manual.

4. If you suspect the spray tip or hose is clogged or

that pressure has not been fully relieved after follow-

ing the steps above, very slowly loosen tip guard

retaining nut or hose end coupling to relieve pres-

sure gradually, then loosen completely. Clear hose

or tip obstruction.

Operation (ProMix PD2K

Only)

See the ProMix PD2K Electronic Proportioner Operation

manual (332562) for operating instructions.

Maintenance

Clean the Dispense Valve Daily

An important part of the care and maintenance of your

automatic dispense valve is proper flushing. Flush the

valve daily with a compatible solvent until all traces of

fluid are removed from the valve passages. Relieve the

pressure before flushing.

Clean the outside surfaces of the valve by wiping with a

soft cloth dampened with a compatible solvent.

Flushing

Before flushing, be sure the entire system and flushing

pails are properly grounded. Refer to Grounding on

page 3. Relieve the pressure. Always use the lowest

possible fluid pressure, and maintain firm metal-to-metal

contact between the dispense valve and the pail during

flushing to reduce the risk of fluid injection injury, static

sparking, and splashing.

Start the pump and flush the system with a compatible

solvent as explained in the instructions for your pump.

Check the system under pressure for leaks; if any are

found, relieve the pressure and repair the leaks. Pres-

surize the system again and make sure the leaking has

stopped.

NOTICE

Be sure the solvent used is compatible with the fluid

being dispensed, to avoid clogging the valve’s fluid

passages.

NOTICE

Never immerse the entire dispense valve in solvent.

Immersing in solvent removes lubricants and may

damage the o-rings.

Troubleshooting

8312782J

Troubleshooting

Before servicing this equipment always make sure to

relieve the pressure.

NOTE: Check all possible causes and solutions before

disassembling.

Repair

NOTE: See the Dosing Pumps manual (332339) for

disassembly instructions on PD2K system.

Disassembly

1. Relieve the pressure.

2. Flush the valve with a compatible solvent.

3. Relieve the pressure after flushing and disconnect

the fluid and air hoses.

4. Unscrew the cap (C) to remove spring pressure on

the valve.

NOTE: Another method of removing spring pres-

sure is by applying air to the ON port, to lift the valve

needle off the seat.

5. Unscrew the dispense valve from the adapter (A).

Inspect the needle ball (B). Also inspect the seat (S)

in the adapter for damage. The seat is reversible.

See FIG. 4.

NOTE: See Fluid Mix Manifold Manual 312781 for seat

replacement instructions and part numbers.

Problem Cause Solution

Valve will not close. Fluid needle binding. Clean, repair.

Piston o-rings binding. Repair.

Obstructed or worn needle or seat. Clean or replace.

Valve will not open. Fluid needle binding. Clean or repair.

Piston o-rings binding. Repair.

No trigger or actuator pressure. Check, clean all lines.

Worn or dry piston o-rings. Replace.

Valve will not dispense. Fluid supply source is not operating. Check on fluid supply source.

Fluid line clogged. Clear.

Fluid valve closed. Open.

Clogged orifice or needle seat. Clean.

FIG. 4. Valve Adapter and Seat

TI12822A

ON Port

Repair

312782J 9

NOTE: See the parts drawings on pages 10 and 13.

6. Unscrew valve cap (11). Remove the spring (12).

7. Hold the needle flats with a wrench to keep it from

turning. Unscrew the piston (9, high pressure

valves) or retainer (10, low pressure valves) from

the needle.

8. Remove the o-rings (7, 8) from the piston (9).

9. Push the needle (22) from the top while pulling it

from the bottom of the fluid body (3).

NOTE: Needle may be hard to remove.

10. Unscrew the needle ball assembly (23) from the

needle (22).

11. Unscrew the fluid body (3) from the air body (6).

Remove the packing (19), bearing (5), and u-cup (4)

from the fluid body.

12. On high pressure valves, remove the o-ring (17)

from the air body (6).

13. Clean, inspect, and replace parts as needed.

Reassembly

NOTE: Seal Kits 15U933 (for high pressure dispense

valve 15X303 and 26A355), 24T817 (for acid catalyzed

valves 24T785 and 26A313), and 15W621 (for low pres-

sure dispense valve 15X304) are available to replace

the seals. Parts included in the kit are marked with an

asterisk, for example (4*). For best results, use all the

parts in the kit.

NOTE: Use the 262028 Seal Installation Tool (supplied

with the ProMix 2KS) to ensure proper installation of the

u-cup (4).

1. Using the 262028 Installation Tool, install the u-cup

(4*) into the fluid body (3) with the lips facing down.

Install the bearing (5*) and packing (19*).

2. Slide the needle (22*) into the fluid body (3) from

the top, down through the packing (19), bearing (5),

and u-cup (4).

3. Apply thread sealant and screw the needle ball

assembly (23*) onto the needle (22*).

4. Apply thread sealant and screw the fluid body (3)

onto the air body (6).

5. On high pressure valves, install the o-ring (17*) on

the air body (6).

6. Install the o-rings (7*, 8*) on the piston (9). Lubricate

the o-rings.

7. Reinstall the piston (9):

a. On high pressure valves, apply thread sealant

to the top threads of the needle (22*). Holding

the needle (22) steady by its flats, screw the pis-

ton (9) onto the needle (22*).

b. On low pressure valves, slide the piston (9) onto

the needle (22*). Apply thread sealant to the top

threads of the needle. Holding the needle (22)

steady by its flats, screw the retainer (10) onto

the needle.

8. Before performing step 9, screw the dispense valve

securely into the adapter (A, FIG. 4).

9. Install the spring (12) and valve cap (11).

NOTE: On high pressure valves, screw the valve cap

(11) onto the air body (6) only until slight resistance is

felt as the cap contacts the o-ring (17*). Do not tighten

the valve cap (11) at this time.

10. Screw the valve cap (11) down onto the air body (6)

until additional resistance is felt and the cap is tight

with the body.

11. Unscrew the valve cap (11) one complete turn for

the factory needle setting, or unscrew cap to setting

prior to repair.

NOTE: To decrease needle travel, turn the cap (11)

clockwise; to increase, turn counterclockwise. The valve

is factory set at one open turn. The maximum setting

is four turns open.

Parts

10 312782J

Parts

15X303 and 26A355 High Pressure Valve

*Parts included in Rebuild Kit 15U933 (purchase sep-

arately).

--- These parts are not available separately.

‡ Remove (12) and replace with this spring (marked

with black stain) when valve is used as a dump valve

or color change valve.

15V737 Valve Lubricator Cup (Option)

Install in fluid body (3) to lubricate seal (4).

TI11582A

19*

*17

22*

23*

20*

Ref.

No. Part No. Description Qty

3 --- BODY, fluid 1

4* --- SEAL, u-cup, spring applied;

uhmwpe

5* --- BEARING, needle 1

6 --- BODY, air 1

7* --- O-RING, shaft, piston; buna-N 1

8* --- O-RING, body, piston; buna-N 1

915T413PISTON 1

11 --- CAP, valve 1

12 17B769 SPRING, compression (Model 15X303) 1

15T454 SPRING, compression (Model 26A355) 1

13 104640 GASKET; buna-N 2

14 104644 PLUG, screw 2

15 109193 ELBOW, tube fitting; 10-32 x 5/32 in. (4

mm) OD tube (Model 15X303)

110460 ELBOW, tube fitting; 10-32 x 5/32 in. (4

mm) OD tube; nickel plated brass

(Model 26A355)

17* --- O-RING, body, air; buna-N 1

19 --- PACKING; uhmwpe 1

20* --- O-RING; ptfe 1

22* --- SHAFT, needle 1

23* --- BALL ASSEMBLY, needle 1

24 15V818 VENT, breather; not shown; remove

(15) and install breather vent in (11)

when valve is used as dump valve or

color change valve

25‡ 17B969 SPRING, compression (not shown) 1

TI13019A

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