Graco G1200 Instructions-parts List Manual

INSTRUCTIONS–P

This manual contains IMPORT

W

ARNINGS AND INSTRUCTIONS

READ AND RET

AIN FOR REFERENCE

ARTS LIST

ANT

Model G1200

HIGH EFFICIENCY

308–008

Rev D

Supersedes

C

LOW PRESSURE

HVLP

100

psi (7 bar) MAXIMUM WORKING FLUID PRESSURE

15 psi (1 bar) MAXIMUM WORKING AIR PRESSURE

See the Selection Chart on page 4 for complete spray
gun

assembly ordering numbers and descriptions.

Warnings 2.

Typical Installation 3.

Selection

Installation 7

Operation 8–9

Maintenance 10

Troubleshooting

Service 12–14

Air Flow 15.

Parts

Drawing

Parts List 17.

How

to Order Replacement Parts

Accessories 18–19

Technical

Warranty Back

SPRA

Y GUN

TABLE OF CONTENTS

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Charts

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Data

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Chart

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Back Cover

Cover

4–6.

11.

16.

17.



GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441

 COPYRIGHT

1990 GRACO INC.



WARNINGS

FOR PROFESSIONAL USE ONLY. OBSERVE ALL WARNINGS.

Read and understand all instruction manuals, tags,

and warning labels before operating equipment.

EQUIPMENT MISUSE HAZARD

General

Any
as
chemicals and fluids, or using worn or damaged parts,
can cause them to rupture and result in serious bodily
injury,

NEVER point the spray gun at anyone or at any part of
the
zle.

ALWAYS
before
any

NEVER try to stop or deflect leaks with your hand or
body.

NEVER
so

CHECK all spray equipment regularly and repair or
replace

System Pressure

This gun has a

SURE
ING PRESSURE

maximum
ponent

Safety

misuse of the

over

pressurizing, modifying parts, using incompatible

fire, explosion or property damage.

body

. NEVER put hand or fingers over the spray noz

follow the

cleaning or removing

system equipment.

alter or modify any part of this equipment; doing

could cause it to malfunction.

worn or damaged parts immediately

spray equipment or accessories, such

Pressure Relief Procedure

the fluid nozzle or servicing

.

MAXIMUM FLUID WORKING PRES-

of 100 psi (7 bar) and a

of 15 psi (1 bar). Never exceed the

working pressure

or accessory used in the system.

MAXIMUM AIR WORK-

of the gun or any other com

, at

right,

Fluid Compatibility

BE SURE all fluids and solvents used are chemically
compatible
NICAL DATA on the back cover . Always read the fluid
and solvent manufacturer ’s literature before using the
fluid

Methylene

cleaning solvent with this gun or any other device with

­nylon or
parts.

Pressure Relief Procedure

To reduce the risk of serious bodily injury , including
splashing
parts,
system,
system, when installing, cleaning or changing fluid noz­zles,

1. T

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

-

with the “W

or solvent in this gun.

Chloride

aluminum components as it can damage these

in the eyes or on the skin or injury from moving

always follow this procedure when shutting off the

when checking or servicing

and whenever you stop spraying.

urn of

f the air and fluid supply to the gun.

tainer

to relieve air and fluid pressure.

etted Parts” shown in the

is not recommended as a flushing or

any part of the spray

TECH-

HOSE SAFETY

TIGHTEN

NEVER use a damaged hose. Before each use, check
the
damage or movement of the hose couplings. If any of
these

all fluid connections securely before each use.

entire hose for cuts, leaks, abrasion, bulging cover

conditions exist, replace the hose immediately

, or

.

HANDLE AND ROUTE HOSES CAREFULL Y. Do not

on hoses to move equipment. Do not use fluids or sol

pull
vents which are not compatible with the inner tube and
cover

of the hose.

IMPORTANT

United

States Government safety standards have been adopted under the Occupational Safety and Health Act. These stan

dards––particularly the General Standards, Part 1910 and the Construction Standards, Part 1926––should be consulted.

 

-

-

Fluid

Inlet

3/8 npsm

(R3/8–19)

MODEL G1200
SPRA

Y GUN

(See Chart, page 4)

TYPICAL INSTALLATION

1500

System
223–293

3/8 npt(m)

System air inlet

1/2 npt(f)
Filter inlet & outlet

Air

Filter 106–149

(See ACCESSORIES)

3/4–11.5 NH*
System air outlet

Quick-

Disconnect

Gun Air Hose

Connection

3/4–11.5 NH*

Swivel Fitting

*NH – standard garden hose fitting

Flexible

Hose

(See ACCESSORIES)

The Model G1200 High Efficiency Low Pressure Spray
Gun was designed to produce the highest quality finish
with

today’

organic

s fluids as well as the the Low V

compound)

fluids of tomorrow

.

.O.C.

(volatile

This spray gun can spray most coatings or finishes cur­rently

being used

for automotive refinish, industrial, aero
space, marine, wood, plastic and architectural applica­tions,

while easily operating from any paint delivery sys
tem, including pressure pots of any size, or remote
pumps

The

for production line operation.

Model G1200 Spray Gun

typically utilizes 10 psi (0.7
bar) air pressure with high air volume to produce high
quality

paint finishes.

One

air source is the High Ef

ficiency Low Pressure 1500

System. This system accurately converts standard air

Air Pressure Relief V

(Set at 15 psi [1.05 bar])

3/4”

ID Air Hose

(See ACCESSORIES)

line

pressure down to the 10 psi (0.7 bar) required to
all new regulations. Another air source is the High Effi­ciency Low pressure 8000 System. This system is a
stand-alone
plying

-

NOTE: Although

powered air supply

, which is

capable of sup

full, consistent air pressure to four guns.

the 1500 and 8000 Systems can have

an output air pressure of 15 psi (1.05 bar), for

-

Installation

operation,10 psi (0.7 bar) or lower output

proper
air

pressure is recommended.

of one of the Air Hose Assemblies listed in the
ACCESSORIES section is required to minimize the air
pressure drop in the hose while still maintaining good
hose flexibility. This combination produces the best
atomization

with high transfer ef

ficiency.

alve

meet

-

308-0083

SELECTION

CHARTS

CHART 1: GUN ASSEMBLIES AVAILABLE

The following complete gun assemblies are
valves.

standard non-bleeder-type guns

Includes:

Complete

Gun Assy.

Part No.

223–252 223–300 223–232 0.055”

223–253 223–300 223–233 0.070”

223–254 223–300 223–234 0.086”

The

following complete gun assemblies are
Drawing
the

and List, pages 12 and 13). The bleeder-type gun allows air to bleed through the gun at all

trigger position.

Gun Body

Assy.

Part No.

Needle/Nozzle/Air Cap

Kit Part No.

bleeder-type guns

, which include the Air V

, with trigger-actuated air shut-of f

Orifice Size

(1.397 mm)

(1.778 mm)

(2.184 mm)

Material Usage

(See

TERMS below)

Light to Medium Fluids or
Low

Fluid

Flow (5–8 oz/min)

Medium to Heavy Fluids
or Medium
oz/min)

Heavy Fluids or Medium
Fluid

alve Filler 187–137 (see Parts

Fluid Flow (6–10

Flow (6–10 oz/min)

times, regardless of

Includes:

Complete

Bleeder

Gun Assy.

Part No.

224–609 224–606 223–232 0.055”

224–610 224–606 223–233 0.070”

224–611 224–606 223–234 0.086”

Gun Body

Assy.

Part No.

Needle/Nozzle/Air Cap

Kit Part No.

TERMS:

Light Fluid:

Medium Fluid:

Heavy Fluid:

15 to 20 seconds (No. 2 Zahn cup) -- Auto, Furniture, Appliances,
Fine Finish Metallics, T

20 to 25 seconds (No. 2 Zahn cup) -- Contact Adhesive, Latex, Maintenance
Paints, T

+25 seconds (No. 2 Zahn cup) -- 2.8 V
High-solid Polyurethanes, Heavy W

extures, Primers, Epoxies, V

op Coats, Lacquer

, Enamel Primer

inyls, High Flow High V

olatile Organic Compounds,

aterborne Enamels

Orifice Size

(1.397 mm)

(1.778 mm)

(2.184 mm)

.

iscosity.

Material Usage

(See

TERMS below)

Light to Medium Fluids or
Low

Fluid

Flow (5–8 oz/min)

Medium to Heavy Fluids
or Medium
oz/min)

Heavy Fluids or Medium
Fluid

Fluid Flow (6–10

Flow (6–10 oz/min)

4 308-008

SELECTION

CHARTS

SELECTING THE PROPER NEEDLE/NOZZLE/AIR CAP SET

The High Efficiency Low Pressure Spray Gun’s needle/
nozzle sets range in size to provide dif ferent fluid flow
rates.

Chart 2 shows the recommended combinations of

needle/nozzle

Select

from Charts 2, 3, and 4, using the following

kits and air caps.

guide

lines.

As

a general guideline,

the

required flow with the needle fully triggered at the low

est

fluid pressure.

For low flow rates or light viscosity fluid,

smaller

For

nozzle

Some
one

nozzle sizes.

high flow rates or high viscosity fluid,

sizes.

applications may benefit by using an air cap that is

size larger then the needle/nozzle size that is being

used. In certain applications, this

use the fluid nozzle that will

select the

select the larger

may improve atomiza

give

tion, keep the air cap cleaner, and will decrease the pat

size. It will increase air flow

tern
pressure

at the air cap.

, but also

will decrease air

Using an air cap size that is smaller than the nozzle/

size

needle

is not

recommended.

NOTE: To help select the proper needle/nozzle size, a

fluid

pressure gauge may be connected
rarily to the gun fluid inlet to determine the fluid
pressure.

-

Selection Problems and Solutions

PROBLEM POSSIBLE

-

Fluid pressure
high (greater than 10
psi [0.7 bar]) with
gun triggered

Using a low pressure
setting, the fluid flow
is too high, 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
(0.7 bar)]

is too

.

-

CAUSE

Using set with too
small orifice

Using set with too
large orifice

There’

s no fluid
regulator or air
regulator is not
sensitive enough

SOLUTION

Use needle/
nozzle/air cap
set with larger
orifice

Use needle/
nozzle/air cap
set with smaller
orifice

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

tempo

-

-

-

CHART 2: NEEDLE/NOZZLE/AIR CAP KIT

Includes:

Standard Plastic

Needle/Nozzle/Air Cap

Kit Part No.

223–230 223–240 185–720 0.030” (0.762 mm)

223–231 223–241 185–721 0.042” (1.067 mm)

223–232 223–242 185–722 0.055” (1.397 mm)

223–233 223–243 185–723 0.070” (1.778 mm)

223–234 223–244 185–724 0.086” (2.184 mm)

223–235 223–245 185–725 0.110” (2.794 mm)

223–236 223–246 185–726 0.125” (3.175 mm)

*Approximate fan width for all air cap sizes 9 to 12 in. (229 to 305 mm).

Needle & SST

Nozzle Kit Part No.

Air Cap*
Part No.

Charts

3 and 4 are on the next page.

Orifice Size

308-0085

SELECTION

CHARTS

CHART 3: STANDARD NEEDLE/NOZZLE KIT

CHART 4:

OPTIONAL SST

MATCHED SET

Standard Plastic

Needle & SST

Nozzle Kit Part No.

223–240 185–700 185–710**

223–241 185–701 185–711

223–242 185–702 185–712

223–243 185–703 185–713

223–244 185–704 185–714

223–245 185–705 185–715

223–246 185–706 185–716

SST Fluid

Nozzle

Part No.

Includes:

Standard Plastic

Fluid Needle

Part No.

Orifice Size

0.030”

(0.762 mm)

0.042”

(1.067 mm)

0.055”

(1.397 mm)

0.070”

(1.778 mm)

0.086”

(2.184 mm)

0.110”

(2.794 mm)

0.125”

(3.175 mm)

Optional SST

Needle/Nozzle

Matched Set

Part No.

223–286

223–287

223–288

223–289

223–290

223–291

223–292

**Non-feathering

6 308-008