DeVilbiss CVI Operation Manual
Service Bulletin
SB-2-658-D
Replaces SB-2-658-C
OPERATION MANUAL
CVi LIGHTWEIGHT GRAVITY FEED SPRAYGUN
English: Pages 3-10
MANUAL DE OPERACIÓN
CVi PISTOLA PULVERIZADORA LIGERO POR GRAVEDAD
Español: Páginas 11-18
GUIDE D’UTILISATION
PISTOLET PULVÉRISATEUR LÉGER À ALIMENTATION PAR GRAVITÉ CVi
Français: Pages 19-25
Page 2 SB-2-658-D
In HVLP mandated areas, use only the #505 HVLP air cap.
Consult your local air quality management agency with any
questions regarding HVLP requirements in your area.
En las áreas donde se exige la indicación HVLP, use únicamente
NOTE:
NOTA:
el casquillo de aire #505 HVLP.
Consulte con la agencia de control de la calidad del aire
en su localidad, cualquier pregunta acerca de los requisitos
de HVLP en su área.
NOTE:
Dans les régions où la norme de grand débit à basse pression
(HVLP) s’applique, utiliser uniquement l'anneau déflecteur nº 505
à grand débit à basse pression.
Consulter l'agence locale de gestion de la qualité de l'air pour
toute question touchant les normes de grand débit à basse
pression (HVLP) en vigueur.
IMPORTANT: Read and follow all instructions and SAFETY PRECAUTIONS before
using this equipment.
DESCRIPTION
The CVi Lightweight Gravity FeedSpraygun
Kit complies to ATEX regulations 94/9/EC,
protection level; II 2 G X, Suitable for use
in Zones 1 and 2.
When using the #505 air cap, this design
uses EPA compliant atomizing (HVLP)
technology to reduce overspray and
improve coating efficiency. This gun
produces approximately 10 psi air cap
pressure at 18 psi gun inlet pressure
(complies with rules issued by SCAQMD
and other air quality authorities.)
IMPORTANT: These Sprayguns are suitable for use with both waterbased and
solvent based coating materials. The
design uses HVLP atomizing technology
to reduce overspray and improve coating
efficiency. If there is any doubt regarding
the suitability of a specific material contact
your local Jobber or DeVilbiss direct.
Page 3SB-2-658-D
SAFETY WARNINGS
FIRE AND EXPLOSION
Solvents and coating materials can be highly flammable or
combustible when sprayed. ALWAYS refer to the coating material
suppliers instructions and COSHH sheets before using this equipment.
Users must comply with all local and national codes of practice and
insurance company requirements governing ventilation, fire precautions, operation and house-keeping of working areas.
This equipment, as supplied, is NOT
Hydrocarbons.
Static Electricity can be generated by fluid and/or air passing through
hoses, by the spraying process and by cleaning non- conductive parts
with cloths. To prevent ignition sources from static discharges, earth
continuity must be maintained to the spraygun and other metallic
equipment used. It is essential to use conductive air and/or fluid hoses.
PERSONAL PROTECTIVE EQUIPMENT
Toxic vapors – When sprayed, certain materials may be poisonous,
create irritation or be otherwise harmful to health. Always read all
labels and safety data sheets for the material before spraying and
follow any recommendations. If In Doubt, Contact Your Material
Supplier.
The use of respiratory protective equipment is recommended at all
times. The type of equipment must be compatible with the material
being sprayed.
Always wear eye protection when spraying or cleaning the spraygun
suitable for use with Halogenated
EC DECLARATION OF CONFORMITY
We: ITW Finishing UK, Ringwood Rd,
Bournemouth, Dorset, BH11 9LH, UK, as
the manufacturer of the Spraygun model
CVi, declare, under our sole responsi-
bility, that the equipment to which this
document relates is in conformity with
the following standards or other normative documents:
BS EN 292-1 PARTS 1 & 2: 1991, BS EN
1953: 1999; and thereby conform to the
protection requirements of Council
Directive 98/37/EC relating to Machinery
Safety Directive, and; EN 13463-1:2001,
council Directive 94/9/EC relating to
Equipment and Protective Systems
intended for use in Potentially Explosive
Atmospheres protection level II 2 G X.
B. Holt, General Manager
30th June 2003
DeVilbiss Automotive Refinishing reserves
the right to modify equipment specification without prior notice.
Gloves must be worn when spraying or cleaning the equipment.
Training – Personnel should be given adequate training in the safe use
of spraying equipment.
MISUSE
Never aim a spraygun at any part of the body.
Never exceed the max. recommended safe working pressure for the
equipment.
The fitting of non-recommended or non-original spares may create
hazards.
Before cleaning or maintenance, all pressure must be isolated and
relieved from the equipment.
The product should be cleaned using a gun washing machine.
However, this equipment should not be left inside gun washing
machines for prolonged periods of time.
NOISE LEVELS
The A-weighted sound level of sprayguns may exceed 85 dB (A)
depending on the set-up being used. Details of actual noise levels are
available on request. It is recommended that ear protection is worn at
all times when spraying.
OPERATING
Spray Equipment using high pressures may be subject to recoil forces.
Under certain circumstances, such forces could result in repetitive
strain injury to the operator.
Page 4 SB-2-658-D
atent No. 2372465 (GB)
P
PARTS LIST
Ref.
No. Description Part Number Qty. Options
1 Air Cap/Retaining ring SP-100-***-K 1 505, 510 e.g *** = 510
2 Nozzle SP-200S-**-K 1 10, 12, 13, 14 e.g ** =13 =1.3 mm
+ 3 Separator SP-626-K5 5
+4 Packing GTI-445-K2 2
5 Spreader Valve SP-403-K 1
6 Stud and Screw GTI-408-K5 5
7 Needle Adjusting Screw SP-614-K 1
+8 Spring SP-622-K5 1
9 Needle SP-300S-**-K 1 10, 12, 13, 14 e.g ** =13 =1.3 mm
10 Airvalve housing & seal SP-612-K 1
11 Spindle 1
12 Trigger SP-617-K 1
13 Connector SP-611-K 1
14 Airflow Valve SP-402-K 1
16 Air Valve Service Kit SPK-101-K 1
17 Retaining Ring and Seals SPK-102-K 1
+18 Clip, Seal and Pin Kit GTI-428-K5 5
23 Air Valve assembly Tool 1
24 Spanner SPN-5-K 1
Spraygun Service Kit SPK-402-K 1
(parts included marked + )
Page 5SB-2-658-D
SPECIFICATION
Air supply connection:
Universal 1/4" BSP and NPS
Maximum static Air inlet pressure:
P1= 12 bar (175 psi)
Nominal gun Air inlet pressure
with gun triggered:
1.2 bar (18 psi) 505 HVLP Air Cap
2 bar (29 psi) 510 Trans-Tech Air Cap
Maximum Service temperature: 40°C
Gun Weight: 412 g
MATERIALS OF CONSTRUCTION
Gun body: Anodized Aluminum
Nozzle: Stainless Steel
Needle: Stainless Steel
Fluid Inlet / Fluid Passages:
Anodized Aluminum & Stainless Steel
Trigger: Nickel Plated Steel
INSTALLATION
Important: To ensure that this
equipment reaches you in first
class condition, protective
coatings have been used. Flush
the equipment through with a
suitable solvent before use.
1. Attach air hose to connector (13).
Recommended hose size 8 mm
bore. The hose must be conductive
and electrical bond from the
spraygun to earth should be checked
with an ohmeter. A resistance of less
than 106Ohms is recommended.
2. Air supply should be filtered and
regulated.
3. Attach cup assembly by screwing
into the Fluid Inlet of the spraygun.
Tighten with a wrench.
OPERATION
1. Mix coating material to manufacturers instructions.
2. Fill the cup with the required amount
of material. Fill to no more than
25mm (1") from the top of the cup.
DO NOT OVERFILL.
3. Attach cup lid.
4. Turn needle adjusting screw (7)
clockwise to prevent movement.
5. Turn spreader valve (5) counterclockwise to fully open.
6. Adjust inlet air pressure (For recommended figures see Specifications)
at the gun inlet with the gun triggered. (pressure gauge attachment
shown under Accessories is recommended for this).
7. Turn needle adjusting screw counter
clockwise until first thread shows.
8. Test spray. If the finish is too dry
reduce airflow by reducing air inlet
pressure or by the Airflow Valve
(14). Screw the Adjusting Knob (14)
in to reduce pressure.
9. If finish is too wet reduce fluid flow
by turning needle adjusting screw
(7) clockwise. If atomization is too
coarse, increase inlet air pressure. If
too fine reduce inlet pressure.
10. The pattern size can be reduced by
turning spreader valve (5) clockwise.
11. Hold gun perpendicular to surface
being sprayed. Arcing or tilting may
result in uneven coating.
12. The recommended spray distance is
150-200 mm (6"-8").
13. Spray edges first. Overlap each
stroke a minimum of 50%. Move gun
at a constant speed.
14. Always turn off air supply and
relieve pressure when gun is not in
use.
PREVENTATIVE MAINTENANCE
1. Turn off air and relieve pressure in
the supply lines, or if using QD
system, disconnect from airline.
2. Remove cup lid and empty coating
material into a suitable container.
Clean the gun and cup, preferably in
a gun wash machine. Clean the cup.
3. Check the breather hole in the Lid
and the drip check lid is not blocked.
4. Remove air cap (1) and clean. If any
of the holes in the cap are blocked
with coating material use a toothpick
to clean. Never use metal wire which
could damage the cap and produce
distorted spray patterns
5. Ensure the tip of the nozzle (2) is
clean and free from damage. Build
up of dried paint can distort the
spray pattern.
6. Lubrication – stud/screw (6), needle
(9) and air valve (11) should be oiled
each day with gun oil.
REPLACEMENT OF PARTS
Nozzle (2) and Needle (9) – Remove parts
in the following order: 7, 8, 9, 1 and 2.
Replace any worn or damaged parts and
re-assemble in reverse order.
Recommended tightening torque for
nozzle (2) 9.5-12 Nm (80-100 lbf in).
Packing – Remove parts 7, 8, 9. Unscrew
cartridge (4). Fit new cartridge finger
tight. Re-assemble parts 9, 8, and 7 and
tighten cartridge (4) with spanner sufficient to seal but to allow free movement
of needle. Lubricate with gun oil.
Air Valve Seal Kit (16) – (Refer to photos
1 to 21 and fig 2)
Spreader valve (5) – Caution: always
ensure that the valve is in the fully open
position by turning screw fully counterclockwise before fitting to body.
Page 6 SB-2-658-D
1. Remove Adjusting Knob (7),
Spring (8), and Needle (9).
4. Remove Valve (11). 5. Using Service Tool SPN-7,
2. Loosen Housing (10). 3. Remove Housing (10) and
engage groove behind the
Valve Seat.
Airvalve Spring.
6. Remove Valve Seat.
7. Push out the Front Airvalve
Seal with a finger.
10. Fit new Seal to gunbody and
press firmly to ensure Seal is
engaged.
8. Turn the Gun upside down
and let the Seal fall out.
11. Fit New Valve Seat to
Service Tool so that the
groove faces the handle end
of tool.
9. Fit New Front Seal to Service
Tool so that the groove faces
the handle end of tool.
Page 7SB-2-658-D
12. Fit Valve Seat to Gunbody. 13. Remove Rear Airvalve Seal
from housing (10) with a
hooked instrument.
15. Fit Seal to Housing (10). 16. Replace Valve (11). 17. Replace Valve Spring by
14. Fit new Rear Seal to Service
Tool so that the groove faces
the handle end of tool.
inserting small end of spring
into gun, and screw in
Housing (10).
18. Tighten Housing. 19. Fit Needle (9). 20. Fit Spring (8) and Knob (7).
21. Adjust Needle Packing (4)
with Spanner sufficient to
seal but to allow free movement of needle. Lubricate
with gun oil.
Page 8 SB-2-658-D
TROUBLESHOOTING
Heavy top or
bottom pattern
Heavy right or left
side pattern
Heavy center pattern
Split spray pattern
Jerky or fluttering spray
Unable to get round spray
Will not spray
Paint bubbles in cup
Fluid leaking or dripping from
cup lid
Starved spray pattern
Excessive overspray
Excessive fog
Dry spray
Fluid leaking from packing nut
Fluid leaking or dripping from
front of gun
*Most common problem.
Horn holes plugged.
Obstruction on top or bottom of fluid tip.
Cap and/or tip seat dirty.
Left or right side horn holes plugged.
Dirt on left or right side of fluid tip.
Remedies for the top-heavy, bottom-heavy, right-heavy, and left-heavy patterns:
1. Determine if the obstruction is on the air cap or the fluid tip. Do this by making a test
2. If the defect is not inverted, it is on the fluid tip. Check for a fine burr on the edge of the
3. Check for dried paint just inside the opening; remove by washing with solvent.
Fluid flow too high for atomization air.
Material flow exceeds air cap's capacity.
Spreader adjustment valve set too low.
Atomizing pressure too low.
Material too thick.
Atomization air pressure too high.
Fluid flow too low.
Spreader adjusting valve set too high.
*Loose or damaged fluid tip/seat.
Baffle seal installed incorrectly.
Material level too low.
Container tipped too far.
Obstruction in fluid passage.
Dry or loose fluid needle packing nut.
Spreader adjustment screw not seating
properly.
Air cap retaining ring loose.
No air pressure at gun.
Fluid needle adjusting screw not open
enough.
Fluid too heavy for gravity feed.
Fluid tip not tight.
Cup lid loose.
Dirty threads on cup or lid.
Cracked cup or lid.
Inadequate material flow.
Low atomization air pressure.
Too much atomization air pressure.
Gun too far from work surface.
Improper stroking (arcing, gun motion too
fast).
Too much or too fast-drying thinner.
Too much atomization air pressure.
Air pressure too high.
Gun tip too far from work surface.
Gun motion too fast.
Gun out of adjustment.
Packing nut loose.
Packing worn or dry.
Packing nut too tight.
Dry packing.
Fluid tip or needle worn or damaged.
Foreign matter in tip.
Fluid needle spring broken.
Wrong size needle or tip.
Clean. Ream with non-metallic point.
Clean.
Clean.
Clean. Ream with non-metallic point.
Clean.
spray pattern. Then, rotate the cap one-half turn and spray another pattern. If the defect
is inverted, obstruction is on the air cap. Clean the air cap as previously instructed.
fluid tip. Remove with #600 wet or dry sand paper.
Balance air pressure and fluid flow. Increase
spray pattern width with spreader adjustment
valve.
Thin or lower fluid flow.
Adjust.
Increase pressure.
Thin to proper consistency.
Reduce at transformer or gun.
Increase fluid flow (increases gun handling
speed).
Adjust.
Tighten or replace.
Install per directions.
Refill.
Hold more upright.
Backflush with solvent.
Lubricate or tighten.
Clean or replace.
Tighten.
Check air supply and air lines, blow out gun
air passages.
Open fluid needle adjusting screw.
Thin material and/or change to larger tip size.
Tighten tip to 9.5-12 Nm (80-100 lbf in.)
Push in or tighten lid.
Clean.
Replace cup and lid.
Back fluid adjusting screw out to first thread,
or change to larger tip size.
Increase air pressure and rebalance gun.
Reduce pressure.
Adjust to proper distance.
Move at moderate pace, parallel to work
surface.
Remix properly.
Reduce pressure.
Reduce air pressure.
Adjust to proper distance.
Slow down.
Adjust.
Tighten, do not bind needle.
Replace or lubricate.
Adjust.
Lubricate.
Replace tip and needle.
Clean.
Replace.
Replace.
TROUBLESHOOTING (continued)
Page 9SB-2-658-D
Fluid dripping or leaking from
bottom of cup
Runs and sags
Thin, sandy coarse finish drying
before it flows out
Thick, dimpled finish "orange peel"
Cup loose on gun.
Cup gasket worn or missing below cup.
Cup threads dirty.
Too much material flow.
Material too thin.
Gun tilted on an angle, or gun
motion too slow.
Gun too far from surface.
Too much air pressure.
Improper thinner being used.
Gun too close to surface.
Air pressure too low.
Improper thinner being used.
Material not properly mixed.
Surface rough, oily, dirty.
Tighten.
Replace cup gasket.
Clean.
Adjust gun or reduce fluid flow.
Mix properly or apply light coats.
Hold gun at right angle to work and
adapt to proper gun technique.
Check distance. Normally approx. 8".
Reduce air pressure and check spray pattern.
Follow paint manufacturer's mixing instrs.
Check distance. Normally approx. 8".
Too much material coarsely atomized.
Increase air pressure or reduce fluid flow.
Follow paint manufacturer's mixing instrs.
Properly clean and prepare.
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