Graco 308293G User Manual

INSTRUCTIONS-PARTS

This

manual contains important warnings and information. READ AND KEEP FOR REFERENCE.

INSTRUCTIONS

LIST

308–293

Rev. G

Supersedes E

and PCN G

Model

M-1265, Series B

Optimiser HVLP

100 psi (0.7 MPa, 7 bar) Maximum Working Fluid Pressure 100 psi (0.7 MPa, 7 bar) Maximum Working Air Pressure 65 psi (444 kPa, 4.4 bar) Maximum Compliant Inbound Air Pressure

U.S.

Patent Pending

Spray Gun

GRACO INC. P.O. BOX 1441

COPYRIGHT

Graco

Inc. is registered to I.S. EN ISO 9001

MINNEAPOLIS, MN

1993, GRACO INC.



55440–1441

Table

of Contents

Symbols

Warnings 2. Selection Air

Flow and Atomizing Pressure7. . . . . . . . . . . . . . . . .

Typical Setup 9 Operation 13 Daily Troubleshooting 18 Service 20 Part Parts Accessories 26 Technical Dimensions 28 Warranty 32

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Charts4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gun Care, Flushing, and Cleaning

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Drawing

List

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Data

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . .

14.

24.

25.

28.

WARNING

EQUIPMENT MISUSE HAZARD

INSTRUCTIONS

Equipment serious injury

misuse can cause the equipment to rupture, malfunction or start unexpectedly and result in

Warning Symbol

WARNING

This

symbol alerts you to the possibility of serious

injury or death if you do not follow the instructions.

Caution Symbol

CAUTION

This

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

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 uncertain about usage, call your Graco distributor.

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

Check equipment daily

Use this equipment only in low pressure, air spray systems.

Do not exceed the maximum working pressure of the lowest rated system component. This equip ment has a

Route the hoses away from the traffic areas, sharp edges, moving parts, and hot surfaces. Do not expose Graco hoses to temperatures above 180

D W

ear hearing protection when operating this equipment.

Use fluids or solvents that are compatible with equipment wetted parts. See the Technical Data section of all equipment manuals. Read the fluid and solvent manufacturer’s warnings.

Methylene Chloride with formic or propionic acid is not recommended as a flushing or cleaning solvent with this gun or any other device with nylon or aluminum components as it can damage these parts.

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

100 psi (0.7 MPa, 7 bar) maximum working fluid and air pressure

. Repair or replace worn or damaged parts immediately

_F (82_

C) or below –40

_F (–40_C).

308–293

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 stop or deflect fluid leaks with your hand, body



Follow the stop spraying; clean, check or servicing the equipment; and install or clean fluid nozzles.



Do not point the spray gun at anyone or at any part of the body

 T

ighten all fluid connections before operating the equipment.



Check the hoses, tubes and couplings daily Permanently coupled hoses cannot be repaired; replace the entire hose.

FIRE AND EXPLOSION HAZARD

Poor

air ventilation, open flames, or sparks can cause a hazardous condition and result in fire or

explosion and serious injury



Provide fresh air ventilation to avoid the buildup of flammable fumes from solvent or the fluid being sprayed.



Extinguish all open flames or pilot lights in the spray area.

Pressure Relief Procedure

, glove or rag.

on page 13 when: you are instructed to relieve pressure;

. Replace worn, damaged or loose parts immediately



Electrically disconnect all equipment in the spray area.



Keep the spray area free of debris, including solvent, rags and gasoline.



Do not turn on or of



Do not smoke in the spray area.



Do not operate a gasoline engine in the spray area.

f any light switch in the spray area while operating or if fumes are present.

TOXIC FLUID HAZARD

Hazardous 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 state and national guidelines.



Dress appropriately for your application. W and respirator

fluids or toxic fumes can cause serious injury or death if splashed in the eyes or on the

. Dispose of hazardous fluid according to all local,

ear the appropriate protective clothing, gloves, eyewear

308–293 3

TERMS:

Selection

Charts

Light Fluid: Medium Fluid: Heavy Fluid:

P/N: NOTE:

See page 6 for additional tips on selecting the needle/nozzle/air cap set best suited to your application.

Up to 18 seconds with No. 2 Zahn cup (20 centipoise) 19 to 28 seconds with No. 2 Zahn cup (20–64 centipoise) Greater than 28 seconds with No. 2 Zahn cup (greater than 64 centipoise) --

2.8 V

olatile Organic Compounds, High-solid Polyurethanes, Heavy W

Part number

CHART 1: GUN ASSEMBLIES, Series B

Standard

With

standard needle/nozzle/air cap kit

Standard Complete Gun Assy

Part No.

236–013 238–233 0.042”

236–014 238–234

Gun Assemblies

Includes:

Standard

Needle/

Nozzle/Air

Cap Kit P/N

Orifice Size

(1.067 mm)

0.055” (1.397 mm)

aterborne Enamels

Material Usage

(See TERMS above)

Light

to Medium Fluids

[5–8

oz./min. (0.15–0.24 l/min.)]

Light to Medium Fluids or Medium Fluid Flow

[6–12 oz./min. (0.18–0.36 l/min.)]

or Low Fluid Flow

236–015 238–235

236–016 238–236

Optional

With

Complete

Gun

Gun Assemblies – available as “Build to Order”

optional needle/nozzle/air cap kit

Includes:

Optional

Assy

Part No.

236–020 238–230 0.020”

236–021 238–231

236–022 238–232

Optional

Needle/

Nozzle/Air

Cap Kit P/N

0.070” (1.778 mm)

0.086” (2.184 mm)

Orifice Size

(0.508 mm)

0.026” (0.660 mm)

0.030” (0.762 mm)

Medium to Heavy Fluids or Medium Fluid Flow

[6–12 oz./min. (0.18–0.36 l/min.)]

Heavy Fluids or High Fluid Flow [10–15 oz./min. (0.3–0.45 l/min.)]

Material Usage

(See TERMS above)

Light Fluids or Low Fluid Flow [3–6 oz./min. (0.09–0.18 l/min.)]

Light to Medium Fluids [5–8

oz./min. (0.15–0.24 l/min.)]

or Low Fluid Flow

4 308–293

Selection

Standard

Charts

CHART 1: GUN ASSEMBLIES, Series B (continued)

Optional

With

Optional

Complete

Gun

Part No.

* Maximum

{

See atomizing air pressure chart on page 7.

Non-HVLP Compliant Gun Assemblies

standard needle and nozzle and optional high pressure air cap

Includes:

{ High

Needle

Assy

236–023 238–217 276–293 189–755 0.042”

236–024 238–218 276–294 189–755

Assy.

P/N

Nozzle

P/N

recommended torque to install molded fluid nozzle in the spray gun is 35 in-lbs (4 N

Pressure

Air Cap

P/N

CHART 2: NEEDLE/NOZZLE/AIR CAP KITS

Standard

Needle/

Nozzle/Air

Cap Kit Part No.

Needle/Nozzle/Air Cap Kits

Includes:

{ Needle

Assy.

P/N

Nozzle

P/N

Air Cap

P/N

Orifice Size

(1.067 mm)

0.055” (1.397 mm)

Orifice Size

Material Usage

(See TERMS on page 4)

Light

to Medium Fluids or Low Fluid Flow

[5–8

oz./min. (0.15–0.24 l/min.)]

Light to Medium Fluids or Medium Fluid Flow

[6–12 oz./min. (0.18–0.36 l/min.)]

m).

238–233 238–217 276–293 188–754 0.042” 238–234 238–218 276–294 188–754 238–235 238–219 276–295 188–755

238–236 238–220 276–296 188–756

{

See

page 6 for needle assembly replacement tips.

Optional

Nozzle/Air

* Maximum

{

See page 6 for needle assembly replacement tips.

Needle/Nozzle/Air Cap Kits – available as “Build to Order”

Includes:

Needle/

{ Needle Cap Kit Part No.

235–306 238–703 276–290 188–754 0.020” 235–307 238–703 276–291 188–754 235–308 238–703 276–292 188–754

Assy.

P/N

recommended torque to install molded fluid nozzle in the spray gun is 35 in-lbs (4 N

Nozzle

P/N

Air Cap

P/N

(1.067 mm)

0.055” (1.397 mm)

0.070” (1.778 mm)

0.086” (2.184 mm)

Orifice Size

(0.508 mm)

0.026” (0.660 mm)

0.030” (0.762 mm)

m).

308–293

Selection

Charts

CHART 3: OPTIONAL ORIFICE PURGE SST NEEDLE 

Optional

Stainless

Orifice-Purge

Needle Part No.



Use

Steel

Orifice Size

186–931 0.042” 186–932 186–933 186–934

(1.067 mm)

0.055” (1.397 mm)

0.070” (1.778 mm)

0.086” (2.184 mm)

these needles to purge fluid out of the nozzle orifice to prevent plugging of the tip with fast drying material. A needle shaft assembly (part no. 224–849) must be used with these needles and replaces the standard one-piece needles.

Selecting the Proper Needle/Nozzle/Air Cap Set

The

High V nozzle sets range in size to provide dif rates. Chart 1 shows the recommended combinations based on fluid viscosities and flow rates.

As a general guideline, use the fluid nozzle that will give the required flow with the needle fully triggered at the lowest fluid pressure.

For low flow rates or light viscosity fluid, select the smaller nozzle sizes.

For high flow rates or high viscosity fluid, select the larger nozzle sizes.

Using an air cap size that is smaller than the nozzle/ needle size is not recommended.

NOTE: T fluid pressure gauge may be connected temporarily to the gun fluid inlet to determine the fluid pressure. See Accessories.

olume Low Pressure Spray Gun’

s needle/

ferent fluid flow

o help select the proper needle/nozzle size, a

CHART 4: NEEDLE ASSEMBLY REPLACEMENT TIPS

Needle

Assembly

Part No.

238–217 191–016 238–218 191–017 238–219 191–018 238–703 191–564

Needle T

ip P/N

Selection Problems and Solutions

PROBLEM POSSIBLE

Fluid pressure is high (greater than 10 psi [70 kPa, 0.7 bar]) with gun trig gered

Using a low pres sure setting, the fluid flow making it necessary to restrict needle travel to reduce fluid flow.

Fluid system will not operate at low enough fluid pres sure [below 10 psi (70 kPa, 0.7 bar)]

is too high,

CAUSE

too

Using set with too small orifice

Using set with too large orifice

There’ regulator or air

regulator is not sensitive enough

s no fluid

SOLUTION

Use needle/ nozzle/air cap set with larger orifice

Use needle/ nozzle/air cap set with small er orifice

Add low pres sure fluid regu lator or add more sensitive air regulator on pressure pot

6 308–293

Air

Pressure

Flow and Atomizing Pressure

NOTE:

All tests were completed with the pattern adjustment valve fully open.

Air Flow



Models

 

236–023 & 236–024

All other models

      

#!



    

        

"# 

Atomizing Air Pressure

(inlet pressure versus atomizing pressure)

Models

     



OMIZING PRESSURE (psi)



  

NOMINAL

        

236–013 to 236–016 and

236–020 to 236–028

GUN INLET PRESSURE (psi)

Atomizing Air Pressure

(inlet pressure versus atomizing pressure)

Models



Model Model 236–024













"# 

        

Gun Inlet Pressure

psi (kPa, bar)

20 (140, 1.4) 30 (210, 2.1) 40 (280, 2.8) 50 (345, 3.4) 21 (147, 1.5) 24 (168, 1.6) 60 (410, 4.1) 26 (181, 1.8) 30 (210, 2.1) 70 (480, 4.8) 32 (224, 2.2) 36 (251, 2.5) 80 (550, 5.5) 38 (265, 2.6) 42 (294, 2.9) 90 (620, 6.2) 43 (301, 3.0) 48 (335, 3.3)

100 (700, 7.0) 48 (335, 3.3) 54 (373, 3.7)

236–023 and 236–024

236–023

"# 

Nominal Atomizing Pressure

psi (kPa, bar)

Model 236–023 Model 236–024

6 (41, 0.4) 7 (48, 0.4)

10 (70, 0.7) 12 (84, 0.8)

16 (111, 1.1) 18 (125, 1.2)

Gun

Inlet Pressure

psi (kPa, bar)

15 (104, 1.0) 1.5 (10.5, 0.1) 25 (174, 1.7) 3.0 (21.0, 0.2) 35 (244, 2.4) 4.5 (31.5, 0.3) 45 (312, 3.1) 6.0 (41.0, 0.4) 55 (379, 3.7) 8.5 (58.5, 0.6) 65 (444, 4.4) 75 (514, 5.1) 85 (584, 5.8) 95 (654, 6.5)

Nominal Atomizing Pressure

psi (kPa, bar)

10.0 (70.0, 0.7)

13.0 (91.0, 0.9)

15.5 (107.5, 1.1)

18.0 (125.0, 1.2)

308–293

Typical

Installation

NOTE:

See the

Accessories

section for

accessories recommended to install the system.

KEY

A Model B

C D

E F G H

M-1265 Spray Gun See page 4 for part numbers. Fluid Inlet; 3/8 npsm (R3/8–19) Air Inlet; 1/4 npsm Air Hose

Recommend

Optional

Air Shut-of Air Regulator Air Filter Air Supply Line

5/16” (7.9 mm) ID hose

3/8” (9.5 mm) ID hose

f V

alve

EF G

The M-1265 HVLP Spray Gun

The

Model M-1265 HVLP Spray Gun was designed to

produce the highest quality finish with today’ well as the the Low V fluids of tomorrow

.O.C. (volatile organic compound)

This spray gun can spray most coatings or finishes currently being used for automotive refinish, industrial, aerospace, marine, wood, plastic and architectural applications, while easily operating from any paint delivery system, including cups, pressure pots, or remote pumps for production line operation.

The Model M-1265 HVLP Spray Gun typically utilizes 65 psi (444 kPa, 4.4 bar) inbound air pressure to produce high quality paint finishes at 10 psi (0.07 bar) atomizing air pressure.

The air regulator must have a minimum air flow capacity of 30 scfm at 100 psi (0.7 MPa, 7 bar) air pressure.

NOTE:

If the gun’

s hanging hook is needed, remove the gun trigger and replace the gun plate with the hook, then reinstall the trigger

. See the parts drawing,

page 24.

s fluids as

Ventilate the Spray Booth

WARNING

prevent hazardous concentrations of toxic and/or flammable vapors, spray only in a properly ventilated spray booth. Do not operate the spray gun unless ventilation fans are operating.

Check and follow all of the National, State and Local codes regarding air ex

haust velocity requirements. Check and follow all local safety and fire codes.

02018

308–293

Setup

1. Connect the Air Line

NOTE:

 You



must install an air pressure regulator (F) on the gun air line to control air pressure to the gun. See Fig. 2.

If your regulated air source does not have a filter

install an air filter (G) on the air line to ensure a dry clean air supply to the gun. Dirt and moisture can ruin the appearance of your finished workpiece. See Fig. 2.

Use a 5/16 inch (7.9 mm) I.D. air hose to minimize excessive pressure drop in the hose.

Connect the air hose (D) to the 1/4 npsm gun air inlet (C).

2. Connect the Fluid Hose

NOTE:

 Before



connecting the fluid line, blow it out with air and flush it with solvent. Use solvent which is compatible with the fluid to be sprayed.

Install a fluid regulator (L) on the fluid line to control fluid pressure to the gun. See Fig. 4.

Filter the fluid line of coarse particles and sediment to avoid clogging the fluid nozzle and causing finishing defects.

Connect the fluid hose (J) to the gun fluid inlet (B) 3/8–18 npsm [R 3/8–19] compound thread.

C D

Fig. 1

Connect the other end of the air hose (D) to a reg ulated air supply line (H).

NOTE:

and air shut-of

Fig. 2 shows the filter (G) air regulator (F),

f valve (E) on the air supply line.

02051

Fig. 3

Connect the other end of the fluid hose (J) to a regulated fluid supply line (K).

NOTE:

fluid shut-of

Fig. 4 shows the fluid regulator (L) and

f valve (M) on the fluid supply line (K).

M J

02052

Fig. 2

01990

Fig. 4

308–293 9

02054

Setup

3. Flush the Spray Gun.

Before

running any paint through the spray gun, flush the gun out with a solvent that is compatible with the fluid to be sprayed, using the lowest possible fluid pressure and a grounded metal container

Fig. 5

WARNING

PRESSURIZED EQUIPMENT HAZARD

o reduce the risk of a serious injury whenever you

are instructed to relieve pressure, follow the

sure Relief Procedure

on page 13.

4. Relieve the Pressure.

Pres-

02053

6. Adjust the Spray Pattern

WARNING

COMPONENT

Do not exceed the

7 bar) maximum fluid and air pres

sure

of this gun. Higher pressures can cause parts

to rupture and result in serious injury

Follow these steps to establish the correct fluid flow and air flow:

A. T

urn the fluid adjustment knob (8) counterclockwise until no restriction of the trigger movement is felt, then turn the knob another half turn. When the knob is turned far enough, the trigger should be able to touch the gun handle when the gun is trig gered.

RUPTURE HAZARD

100 psi (0.7 MPa,

open

5. Position the Air Cap

Rotate

the air cap as needed to achieve the desired spray pattern direction. T the pattern air of knob (13a) fully clockwise. Refer to Fig. 12.

Fig.

f by turning the pattern adjustment

o create a round pattern, turn

Vertical Pattern

Horizontal Pattern

02017

Fig. 7

02020

10 308–293

+ 22 hidden pages