DeVilbiss DEMI 2 Installation manual

DEMI 2
Operation Manual
Read and follow all instructions and SAFETY PRECAUTIONS before
using this equipment.

2
DEMI2
Table of Contents
MODELS ....................................................................................................... 3
SPECIFICATIONS......................................................................................... 3
PARTS LIST .................................................................................................. 4
SAFETY PRECAUTIONS ............................................................................. 5
INSTALL ATION............................................................................................. 6
OPER ATION ................................................................................................. 6
PREVENTIVE MAINTENANCE .................................................................... 6
REPLACEMENT OF PARTS ........................................................................ 7
SERVICE CHECKS....................................................................................... 8
ACCESSORIES............................................................................................. 9

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DEMI2
MODELS
DEMI2 – Air CapNo. – Fluid Tip Size – Type of Feed G : Gravity
(Ex.) : DEMI2-DL8-1.1-G ← (DL8 Air Cap - Size1.1mm - Gravity)
SPECIFICATIONS
Maximum Working Air Pressure: 0.69 MPa, Maximum Working Fluid Pressure: 0.69 MPa
Weight:190g
Fluid inlet : G1/4 Air inlet : G1/4
Chart. 1
Air Cap No.
Part Number
Type of Feed Air consumption Gun
inlet pressure
Pattern width (mm)
DL8
DM2-3-DL8 G80l / min
0.10 M Pa 140
DL6
DM2-3-DL6 G60l / min
0.10 M Pa 90
DR1
DM2-3-DR1 G20l / min
0.10 M Pa Round
Chart. 2
Fluid Tip
Part Number
Needle
Part Number
Tip size
(mm)
Application
DM2- 4-1.1 DM2- 41-1.1 1.1 Spot, Touch-up
DM2-4-0.8 DM2- 41- 0.8 0.8 Spot, Touch-up
DM2-4-0.5 DM2-41-0.5 0.5 Deodorant, Hobby

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DEMI2
PARTS LIST
Chart 3
Ref.
No.
Part Number Description Qty
1DM2-6 Retaining Ring Assy. 1
2DM2-55-K5 Ring Seat Kit of 5 1
3Refer to "Chart.1" Air Cap 1
4Refer to "Chart.2" Fluid Tip 1
5DM2-35 Paint Nipple(with Seat) 1
6DM2-44 Pattern Valve 1
7DM2-443 Air Seal Kit 1
8DM2-43 Air Valve 1
9DM2-25-K5 Valve Spring Kit of 5 1
10 DM2-12 Air Valve Bushing 1
11 Refer to "Chart.2" Needle 1
12 DM2-14-K5 Needle Spring Kit of 5 1
13 DM2-13 Needle Adjusting Knob 1
14 DM2-463 Needle Packing 1
15 DM2-45 Bearing Stud Kit 1
16 DM2-108 Trigger 1
17 DM2-42 Cheater Valve 1
18 DM2-30 Air Connector 1

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DEMI2
SAFETY PRECAUTIONS
This manual contains information that is important for you to know and understand. This
information relates to USER SAFETY and PREVENTING EQUIPMENT PROBLEMS. Read and
follow SAFETY PRECAUTIONS before using this equipment.
■FIRE OR EXPLOSION HAZARD
1. When spraying, adequate exhaust must be provided to keep air free of accumulations of
ammable vapors which may cause re or explosion.
2. Smoking must never be allowed in the spray area.
3. Static electricity is generated and a static spark could be produced in the spray area. To
prevent the risk of re or explosion, ground without fail all conductive objects in the spray
area.
4. Make it sure to use and ground hoses with static wire for spray gun operation. If
improperly grounded, a static spark possibly produced may cause re or explosion.
5. Fire extinguishing equipment must be provided in the spray area.
6. Solvents used for cleaning must have a flash point equal to or higher than that of the
coating. Those for general cleaning must have flash points above 37.8°C(100°F) to
prevent the risk of re.
■INHALING TOXIC SUBSTANCES
1. Toxic vapors and liquids are harmful to health. When spraying, adequate exhaust must be
provided to keep the air free of accumulations of toxic materials and the use at all times of
respiratory protective equipment must be set compulsory.
2. Always wear eye protection when spraying or cleaning the equipment.
3. Certain materials may be harmful if there is contact with the skin. Read carefully all the
labels and safety performance data of the materials and solvents to be used. Appropriate
clothes and gloves must be worn for spraying or cleaning the equipment.
■MISUSE
1. Operators should be given adequate and appropriate training in the safe use and
maintenance of this equipment.
2. Pressured liquids may injure eyes. Do not point the spray gun to any person.
3. Gravity or suction feed gun must not be used for pressure feed gun.
4. Parts with compressed air may damage the human body. Connect air hoses tightly by
using a spanner so that air never leaks. If tightened loosely, hoses can be removed which
may result in damaging the human body, objects to be coated and other equipment used
together.
5. Parts with compressed air or under spring pressure may injure the human body.When
replacing such parts, clean the spray gun by discharging the materials, discharge the air,
remove air hose and uid cup and then replace such parts by placing the gun at. Eye
protection must be worn when repairing the spray gun.
6. Do not use the gun at no more than maximum working pressure (0.69MPa).

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DEMI2
INSTALLATION
1. The air supplied to spray gun must be cleaned air which any water, oil and solid material
removed. To set up the Mist Separator and Air Transformer near the gun is recommended.
The use of air not cleaned may cause coating troubles.
2. Connect uid cup and air hoses tightly. If tightened loosely, hoses can be removed which
may result in damaging the human body, objects to be coated and other equipment used
together.
OPER ATION
1. The recommended pressure of air supplied to gun is in a range of 0.15MPa-0.20Mpa.
Do not supply to gun the air pressure in excess of the gun’s maximum working pressure
(0.69MPa).
2. Try with the pressure starting from 0.1MPa - 0.2Mpa or around as the spraying pressure
varies depending upon the inner diameter of gun, triggering distance, materials etc.
3. The recommended spray distance is 150mm. If the spray distance is too far, good result
does not appear.
4. In order to get uniform nishing the spray gun should be hold vertically toward the painting
surface.
PREVENTIVE MAINTENANCE
1. Daily lubrication and cleaning is necessary to maintain the best condition of the gun.
2. To clean the gun body, wipe exterior with solvent dampened cloth. Do not submerge the
gun body in solvent as any solids may get into the air passage and cause troubles.
3. Do not leave the gun with solvent in uid cup. Clean the spray gun after used with clean
solvent and empty the cup. To clean the uid cup, after removing extra paint, through the
appropriate solvent and ush down the residual paint.
4. The Air Cap can be immersed in solvent and brushed down for cleaning. If orices are
clogged, use a toothpick to remove obstruction. Never use a steel wire or hard instrument.
This will damage air cap and result in a distorted spray pattern.
5. Do not immerse any plastic parts in solvent for long time.
6. Certain portions of gun should be lubricated. Do not lubricate to any portion where
not instructed. For lubrication, SSL-10 Gun Lube* is recommended (*sold separately,
vegetable not repelling materials).
7. The following portions should be lubricated regularly; Trigger Stud (15), Pattern Valve
(6), threads of cheater Valve (17) and Adjusting Screw (13), Air Valve (8) stem, portion of
Packing Gland (14) here Needle (11) comes in and out.
8. When installing Air Cap (3), make sure no foreign materials adhered on Retaining Ring (1)
and thread of body and then oil one drop of Gun Lube SSL-10.
9. Apply non-silicone grease lightly on Needle Spring (12) and Air Valve Spring (9). Do not
apply too much grease as it may clog the air passage.

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DEMI2
REPLACEMENT OF PARTS
Before replacing gun parts, remove materials from the gun for cleaning. Then release the air
pressure in the gun and disconnect air hoses. All repairs should be made on a clean at surface.
Use only appropriate tools indicated for replacement of parts.
Fluid Tip (4) and Needle (11)
1. It is recommended to replace Fluid Tip (4) and Needle (11) as a set.
2. Loosen completely Pattern Valve (6) by turning the knob counterclockwise.
3. Remove Adjusting Screw (13) and Needle Spring (12) and then withdraw Needle (11) from
the gun body.
4. Remove Retaining Ring (1) and Air Cap (3).
5. Remove Fluid Tip (4) by using socket wrench, offset wrench or the spanner .
6. Recommended torque of Fluid tip is 8N·m when you re-assemble.
Fluid Inlet and Air Connector (18)
Fluid Inlet and Air Connector (18)are fixed together by sealing material. Do not disassemble
these connectors if it is not necessary. It may become a cause of problem.
Pattern Valve (6) and Cheater Valve (17)
When disassembling and reassembling Pattern Valve (6) and Cheater Valve (17), turn the knobs
completely counterclockwise and then disassemble or reassemble them.
Air Seal Kit (7)
1. Remove Needle Adjusting Screw (13) and Needle Spring (12) and then withdraw Needle
(11) from the Gun Body (8).
2. Remove Air Valve Bushing (10), Valve Spring(9), Air Valve (8).
3. From the back of the Trigger (16), push the front part of the Air Seal Kit toward the back of
the gun to remove it.
4. Hook the rear part of the Air Seal in the Air Valve Bushing (10) using a thin wire to remove it.
5. Do not reuse the removed Air Seal because usually it has been damaged.
6. Attach the new Air Seal, and then insert it into the body and Bushing. See the exploded
view and be careful of the installation direction when attaching.
Needle Packing (14)
1. Remove Bearing Stud kid (15) and Trigger (16) using at-blade screwdriver.
2. Remove Fluid Adjusting Knob (13) and Needle Spring (12) from gun, and then remove
Fluid Needle (11).
3. Loosen and remove the Packing (14) using wrench .
4. Re-assembling the Packing (14). Assemble into gun body by hand and then tighten using
the wrench.
5. Insert Fluid Needle (11), and then Needle Spring (12), and Needle Adjusting Knob (13).
6. Re-assembling Bearing Stud kid (15) and Trigger (16) using at-blade screwdriver.
7. Trigger the gun several times to verify correct operation and adjust the packing by using
the wrench.

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DEMI2
SERVICE CHECKS
Normal spray pattern
problem Cause Correction
Will not spray No pressure to gun.
Adjust ing Screw (13) not properly adjusted.
Check air and material lines.
Adjust.
Inproper spray pattern
A B C D
A,B : Material build up on the Air Cap or
Fluid Tip.
C,D : Incorrect uid delivery or viscosity.
A,B : Clean the Air Cap or Fluid
Tip.
C,D : Adjust.
Jerky or uttering
spray Insufficient material in the cup or Loose
connector.
Gun material passage plugged.
Worn Needle Packing (14).
Loose or damaged Fluid Tip (4).
Fill cup or tighten the Connector.
Clean.
Replace.
Tighten or replace.
Fluid leaking from
needle packing nut
(14)
Loose of Needle Packing (14)
Worn or damaged Needle Packing (14).
Tighten Needle Packing (14).
Tighten or replace.
Dripping from uid
tip(4)
Worn or damaged Fluid Tip (4) or
Needle(11).
Stuck Needle Packing (14) or Needle(11).
Incorrect adjustment of Needle Packing (14)
Loose Adjusting Screw (12)
Replace.
Lubricate.
Hold the end of the Needle (11)
with your hand to adjust. Fix it but
leave some space so that it can
still move a little bit.
Adjust.

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DEMI2
ACCESSORIES
Part No. Description
KG-250-DEMI Stainless Steel Gravity Cup with Stand for DEMI gun (250cc) SUS
KG-250-FA-DEMI Gravity Cup with Stand for DEMI gun (250cc Free angle type) SUS
KG-150-FA-DEMI Gravity Cup with Stand for DEMI gun (150cc Free angle type) SUS
DAH-10 Air Hose Set (10m)
DAH-20 Air Hose Set (20m)
HAV-503-B Air Adjusting Valve with Gauge
HAF-507 Disposable Air Filter
SSL-10 Gun Lube (60ml)
42884-214-K5 Cleaning Brush (kit of 5)
SHIM-3 SHIM MASK
D803553-K12 Anti-Static Wiper (kit of 12)

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