DA-300 LVMP AUTOMATIC SPRAY GUN
Operation Manual
Important：Read and follow all instructions and SAFETY PRECAUTIONS before using this equipment.

DESCRIPTION
DA-300 LVMP gun is developed to achieve high transfer efficiency and it can be obtained as well as high atomization with lessair consumption. LVMP stands for Low Volume Medium Pressure.
Small, lightweight LVMP gun is suitable for installing to automatic or semi-automatic machines.
Models and application information follows.

MODELS
Example: DA － 300 － 3□□ － □□□Basic Part No.

Fluid Tip Size 0.8, 1.1, 1.4, 1.8 mm
Air Cap No. 305MT, 307MT, 345

NOTE: The fluid passage is made of Stainless Steel. This gun can be used with waterborne paint.
Chart 1
Air Cap
MarkingPart No.

Fluid Tip Size(mm)305MT

JJ-3-305MT

0.8, 1.1, 1.4, 1.8

250mm
Straight

Most conventional materials

307MT

JJ-3-307MT

0.8, 1.1, 1.4, 1.8

300mm
Straight

Most conventional materials

345

JJ-3-345

0.8, 1.1, 1.4, 1.8

320mm
Straight

Most conventional materials

Pattern Size Shape

Typical Applications

Chart 2Air Cap
305MT,307MT
345

Tip Marking (mm)Part Number
Lapped Set (Tip & Needle)

0.8

DA-430-0.8

1.1

DA-430-1.1

1.4

DA-430-1.4

1.8

DA-430-1.8

1SAFETY PRECAUTIONSThis manual contains important information that ALL users should know and understand BEFORE using this equipment. Thisinformation relates to USER SAFETY and PREVENTING EQUIPMENT PROBLEMS.
To help you recognize this information, we use the following terms to draw your attention to certain equipment labels andportions of this manual. Pay special attention to any label or information that is highlighted by one of these terms:
WARNING

Important information to alert you to a situation that might cause serious injury or loss of life if instructions
are not followed.

CAUTION

Important information that tells how to prevent damage to equipment.

NOTE

Information that you should pay special attention to.

WARNING
The following hazards may occur during the normal use of this equipment. Please read the following chart.
HAZARDCAUSESAFEGUARDS

Fire

Solvents and coatings can be highly 1. Adequate exhaust must be provided to keep
flammable or combustible, especiallythe air free of accumulations of flammablewhen sprayed.
vapors.
2. Smoking must never be allowed in the sprayarea.
3. Fire extinguishing equipment must bepresent in the spray area.
4. Static discharges must be prevented.
Ground(earth) all conductive objects in thespray area, such as a cleaning solvent
bucket, fire extinguisher, etc.
5. When using solvents for cleaning:• Those used for equipment flushing musthave a flash point equal to or greater thanthat of the coating.
• Those used for general cleaning musthave flash points above 100°F (37.8°C).

Inhaling Toxic Substances

Certain materials may be harmful if
inhaled or if there is contact with theskin.

1. Follow the requirements of the Material
Safety Data Sheet supplied by coating
material manufacturer.
2. Adequate exhaust must be provided to keep
the air free of accumulations of toxic
materials.
3. Use a mask or respirator whenever there is achance of inhaling sprayed materials. The
mask must be compatible with the material
being sprayed and its concentration.
Equipment must be as prescribed by anindustrial hygienist or safety expert, and be
NIOSH approved.

Explosion Hazard –Incompatible Materials

Halogenated hydrocarbon Solventsfor example:
methylene chloride and1,1,1,-Trichloroethane are notchemically compatible with thealuminum that might be used inmany system components. The
chemical reaction caused by thesesolvents reacting with aluminum canbecome violent and lead to an
equipment explosion.

This spray gun can be used with these solvents.
However, aluminum is widely used in otherspray application equipment – such as material
pumps, cups, regulators, valves, etc.
Check all other equipment items before use of
these solvents. Read the label or data sheet forthe material you intend to spray. If in doubt as towhere or not a coating or cleaning material iscompatible, contact your material supplier.

2HAZARD

CAUSE

SAFEGUARDS

General Safety

Improper operation or maintenancemay create a hazard.

Operators should be given adequate training inthe safe use and maintenance of the equipment(in accordance with the requirements ofNFPA-33, Chapter 15 in U.S.). Users mustcomply with all local and national codes ofpractice and insurance company requirements
governing ventilation, fire precautions, operation,maintenance and housekeeping (in the U.S.,
these are OSHA Sections 1910.94 and1910.107 and NFPA-33).

Noise Levels

The continuous A-weighted soundWear earplugs when using the spray gun.
pressure level of this spray gun may
exceed 85dB(A) depending on theair cap/nozzle set-up being used.
Sound levels are measured using animpulse sound level meter andanalyzer, when the gun is being used
in a normal spraying application.
Details of actual noise levels
produced by the various air
cap/nozzle set-ups are available on
request.

Spraying solvent

Pressured air/fluid passage may be
broken when cleaning or flashingwith solvent.
The solvent may be harmful if
contacted with eyes.

Always wear eye protection when spraying orcleaning the equipment.

Misuse:• All spray guns project particles at high velocity and must never be aimed t any part of body.
• Never exceed the recommended safe working pressure for any of the equipment used.
• The fitting of non-recommended or non-original accessories or spare parts may create hazardous conditions.
• Before dismantling the equipment for cleaning or maintenance, all pressures, air and material, must be isolated andreleased.
Disposal of non-metallic materials must be carried out in an approved manner. Burning may generate toxic fumes.
The removal of waste solvents and coating materials should be carried out by an authorized local waste disposal service.

3

SPECIFICATIONS
Max. Air Pressure

0.69MPa (6.9 bar)Max. Fluid Pressure

0.69MPa (6.9 bar)

Cylinder Air Pressure

Min. 0.35MPa (3.5 bar)Max. 0.50MPa (5.0 bar)

Weight507g

Gun Stud Diameter

16.0mmFluid Thread

G1/4 (M) CAP Thread: G1/4 (M)CYL Thread

G1/4 (M)

INSTALLATION
Figure 1. Dimensions

Mount the gun with the set screw (22).
NOTE:
The air supplied to the gun should be clean air that removed any impurities. Also, the air hose should have enough innerdiameter depending on the length to supply necessary air.

OPERATION
1. Mix, prepare and strain the coating material to be sprayed according to paint manufacturer’s instructions.
2. Adjust the CYL air at 0.35 Mpa ~. Please use air regulator for setting the air pressure for the smooth movement of CYL.
3. Turn Needle Adjusting Knob counter-clockwise 3.5 turns from fully closed position. This makes the Needle fully opened.
4. Adjust CAP air at 0.20Mpa.~0.25Mpa.
5. Adjust fluid pressure at about 0.07Mpa~0.1Mpa.
6. Turn on CYL air and test spray. Adjust fluid and air pressure until desired pattern is obtained. Pattern size can be adjusted
by using pattern valve (5). Control fluid pressure at supply source. Always attempt to keep CAP pressure as low as possible
to minimize overspray and control the air at air supply source.
WARNING
Risk of injury. Equipment and fluid may be under pressure. Pressure in the system must be relieved before beginning thecleaning procedure and before replacing any parts. Follow the procedures in the literature provided with the system.

4CLEANING
1. Relieve air pressure from pressure tank. Carefully follow instructions in bulletin sent with tank.
2. Replace material in container with a suitable solvent.
3. Repressurize system.
4. Trigger gun and repeat procedure until gun and hose are thoroughly clean. A SolventSaver TM type hose and gun cleaner
which supplies a mixture of air and solvent can be used to most effectively clean gun and hose internal passages. See“Accessories” for SolventSaver™ .
5. Wipe exterior of gun with a solvent dampened cloth.
CAUTION
Do not totally submerge gun in solvent. It is possible for wash solids to flow into air operating sections of gun which could
seriously damage piston “O” Ring seals.
CAUTION
The air cap can be immersed in solvent for cleaning and brush the gun. If orifices are clogged, use a broom straw or
toothpick to remove obstruction. Never use a steel wire or hard instrument. This will damage air cap and result in a distorted
spray pattern.

REPLACEMENTTools Required Crescent Wrench or Spanner 19mm Box Wrench or Hex Wrench (for Item No. 4)
 Pliers (for Needle Assy) Large Minus Screw Driver
Fluid Tip, Fluid Needle (4), Needle Packing Kit (7)1. Relieve all air and fluid pressure in system.
2. Remove Retaining Ring (1) and Air Cap (3).
3. Remove Fluid Tip (4).
4. Replace Fluid Tip and Needle at the same time with the lapped set. It is recommended to replace Needle Packing Kit (7)at the same time as replacing the tip and needle.
5. Remove Ratchet Assy. (18) and Pull Needle Assy. out from gun body with Pliers.
6. Remove Cover (20), and then remove needle packing kit (7).
7. Reassemble in reverse order. It is recommended to put Gun lube (SSL-10) slightly between needle and needle packing.
(For solvent base paint)
8. Recommended torque of Fluid Tip: 10~11N.m.
Piston Cup (13), Air Valve (11), O-Ring (8), Gasket (9)1. Remove Ratchet Assy. (18) and Pull Needle Assy. out from gun body.
2. Screw Needle (from the rear side) in Piston Cup (13) and pull Needle to take out Piston Cup.
3. Turn Air Valve (11) counter-clockwise with proper tool putting in the slot and remove it.
4. Remove O-Ring (8) and Gasket (9).
5. Wipe the inside of cylinder and clean it. Apply non-silicone grease lightly on O-Ring. (For solvent base paint)
6. Reassemble in reverse order.
Fluid Inlet (19), Air Connector (22)
1. When Remove Fittings and reassemble the gun, remove the sealing material from the gun body and fittings completely.
2. Put the new sealing material (Loctite 242, etc.) on the thread part of fittings when reassemble.

5Figure 5. Gun Exploded View

Ref No.
123457891011121314151617181920
21222324

Part Number
JJ-6
JJ-50-K5
See Chart. 1
See Chart. 2
DA-44
DA-463DA-P9P16
DA-12
DA-P10-K5
DA-43
DA-Y20-K3
DA-9
DA-4993
DA-46-K5
3/16BALL-K5
DA-34
DA-402R
DA-35
DA-33
DA-2048
DA-30
PC6-02
PC8-02DA-432

Description
Retaining Ring (with seat)
Seat Kit of 5Air Cap
Lapped Set (Fluid Tip & Needle)
Pattern Valve Assy.
Needle Packing Kit
O-Ring Kit
Air Valve Gasket
O-Ring Kit of 5
Air Valve Assy.
Y-Packing Kit of 3
Piston Assy.
Spring Kit
E-Ring Kit of 5
Ball Kit of 5
Ratchet Spring
Ratchet Assy.
Fluid Inlet
Cover
Set Screw
Air Connector
Quick Fitting Joint O.D. 6 (24.7mm)
Quick Fitting Joint O.D. 8 (26.6mm)
Needle Adjusting Knob Assy.
Non-Ratchet type

6Qty
111111111111111111122Remarks
With JJ-50

1Option1

With DA-Y20

SERVICE CHECKNormal spray pattern

The proper combination of fluid pressure, fan and atomization air pressure,and fluid tip size should result in a pattern of this shape.

problem

CauseWill not spray.

Improper spray pattern.

Correction

No pressure to gun.

Check air and material lines.

Piston stops moving.

Check CYL air pressure.

A.
A, B.

A.
A, B.

Gun not adjusted properly.
Material build up on the air cap (3)or fluidtip (4).

Re-adjust. See “Operation Section”.
Clean the air cap or fluid tip.
See “Preventive Maintenance”.

NoteTo determine where the material build up is, rotate the air cap 180°and test spray. If the patternstays in the same position, the condition is caused by material build up on the fluid tip. If the patternchanges with air cap movement, the buildup is in the air cap.
C, D.

Wrong material or material too thick.
Insufficient material or atomizing air
pressure too high.

C, D

Adjust material pressure or thin material.
Increase material or reduce atomizing
air pressure.

Jerky or fluttering spray

1.Insufficient material in the tank or an obstruction 1. Fill tank or clear obstruction.
in the line.
2.Gun material passage plugged.
2. Clean.
3.Worn Needle Seal Kit (7).
3. Replace.
4.Loose or damaged fluid tip.
4. Tighten or replace.

Air leaking fromRatchet Assy. (18).

1.Damaged or worn Piston Cup (12).
2.Damaged cylinder of Gun Body.

1. Replace.
2. Replace.

Dripping from Fluid Tip.

1.Worn or damaged Fluid Tip (4) or Needle (4).
2.Needle Spring (14) damaged or deformed.

1. Replace.
2. Replace.

Air or fluid leaking fromGun Body.

Damaged or worn Needle Seal Kit (7)Replace.

ACCESSORIESPart No.

Description

SSL-10

Gun Lube (60m)42884-214-K5

Cleaning Brush (Kit of 5)

AGA-415

Universal Clamp

GC-100-K48

Gun Cover (Kit of 48)

HD-505-W

Quick Cleaner (5)83GZ-5200

Solvent Saver (10)DIVISION

Ransburg Japan KK
HP http://www.carlisleft.co.jp®DEVILBISS is a registered trademark of Carlisle Fluid Technologies.
®Jupiter is a registered trademark of CFT Ransburg Japan KK.

©2017 Carlisle Fluid Technologies.
2017-07-DA-300

7