DeVilbiss COBRA 3C User manual

Operation Manual

COBRA 3C –Automatic Spray Gun

SB-E-2-741 ISS.03

II 2 G X T6

Table of Contents

Topic

Page

Characteristics

EC Declaration of Conformity

Safety Warnings

Model Part Numbers

- Table 1: Air Cap Range

- Table 1: Fluid Nozzle & Needle Range

Specification & Materials of Construction

Exploded View

Parts List

Dimensions

Air Connection

Maintenance

Body Removal

Piston/Needle Removal

Needle Packing Removal

Fluid Nozzle Removal

Manifold O-ring and Connector Removal/ Assembly

Setting Micrometer

Air Cap Indexing (Optional)

Troubleshooting

Accessories

Warranty

Manual Operation

Cobra 3C Automatic Spray gun

Important - Read and follow all instructions and Safety Precautions

before using this equipment.

CHARACTERISTICS:

This automatic spray gun complies with ATEX regulations 94/9/EC, protection

level II 2 G X T6, suitable to use in zones 1&2.

This Cobra 3 is a production spray gun suitable for use with automatic and

semi-automatic machines in HVLP or Trans-Tech applications.

Remotely positioned valves (supplied by user) control all air supplies for

atomisation, fan size and triggering.

To handle a wide range of coating materials this spray gun is made from high

grade stainless steel.

IMPORTANT: These Spray guns are suitable for use with both water based

and solvent based coating materials. These guns are not designed for use

with highly corrosive and/or abrasive materials and if used with such materials

it must be expected that the need for cleaning and/or replacement of parts will

be increased. If there is any doubt regarding the suitability of a specific

material, contact your DeVilbiss Distributor or DeVilbiss direct. NOTE: This

gun is not to be used with halogenated hydrocarbon solvents or cleaning

agents such as 1, 1, 1,-Trichloroethane or methylene chloride. These solvents

can react with the aluminium components used in this gun. The reaction can

become violent and lead to an equipment explosion.

Fluid Tips and Needles are only available in hardened stainless steel.

Pressure feed material supply can be re-circulated or direct.

The needle adjustment knob has a micrometer control allowing fine and

accurate fluid flow control.

EC Declaration of Conformity

Finishing Brands UK Limited reserves the right to modify equipment specification without prior

notice

We, Finishing Brands UK Limited, Ringwood Rd, Bournemouth, Dorset, BH11 9LH, UK as

the manufacturer of the spray gun model Cobra 3C, declare, under our sole responsibility that

the equipment to which this document relates is in conformity with the following standards or

other normative documents:

BS EN 12100:2010, BS EN 1953:2013; and thereby conforms to the protection requirements of

Council Directive 2006/42/EC relating to Machinery Safety Directive, and;

EN 13463-1:2009, Council Directive 94/9/EC relating to Equipment and Protective Systems

Intended for Use in Potentially Explosive Atmospheres protection level II 2 G X T6.

D.Smith General Manager

14th March 2014

Safety Warnings

Fire and explosion

Solvents and coating materials can be highly flammable or combustible when sprayed.

ALWAYS refer to the coating material supplier’s 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 suitable for use with Halogenated 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 spray gun and other metallic

equipment used. It is essential to use conductive air and/or fluid hoses.

Personal Protective Equipment

Toxic vapours –When sprayed, certain materials may be poisonous, create irritation or are

otherwise harmful to health. Always read all labels, safety data sheets and follow any

recommendations for the material before spraying. 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 spray gun.

Gloves must be worn when spraying or cleaning the equipment.

Injection Hazard –Spray from the gun, hose leaks or ruptured components can inject fluid

through skin into the body and cause extremely serious injury including poisoning. GET

IMMEDIATE MEDICAL ATTENTION. INFORM THE DOCTOR WHAT TYPE OF MATERIAL

WAS INJECTED.

Do not put fingers or hand over the spray tip.

Replace all worn, damaged or loose parts immediately.

Training –Personnel should be given adequate training in the safe use of spraying

equipment. Misuse

Never aim a spray gun 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 spray guns 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.

Model Part Numbers

CBA3C - ##### - ### N

e.g. CBA3C-590-085N

Where:-

590= 590 Trans-Tech Air Cap

085=0.85mm Fluid Nozzle and Needle

N= Hardened Fluid Nozzle and Needle

e.g. CBA3C-590HV-10N

Where:-

590HV= 590HV HVLP Air Cap

10= 1.0mm Fluid Nozzle and Needle

N= Hardened Fluid Nozzle and Needle

Table 1: Air Cap Range

Air Cap Type

Part No.

Technology

Marking On Cap

590

SP-100-590-K

Trans-Tech

COM 590

590 HV

SP-100-590HV-ADV-K

HVLP

590 HV

Table 2: Hardened Fluid Nozzle and Needle Range

Fluid Nozzle Size

Hardened

Fluid Nozzle

Hardened

Fluid Needle

Marking on

Fluid Needle

0.7

SP-259N-07-K

SPA-353-07-K

3C 07

0.85

SP-259N-085-K

SPA-353-085-K

3C 085

1.0

SP-259N-10-K

SPA-353-10-K

3C 10

Specification & Materials of Construction

Thread

Pressure

Air inlet Pattern + Length (P1)

1/8”BSP Female

P1 Max 12 bar / 174 psi

Fluid inlet & fluid recirculation (P2)

1/8”BSP Female

P2 Max 15 bar / 218 psi

Cylinder/trigger

1/8“ BSP Female

3.5 to 6 bar / 51 to 87 psi

Maximum temperature in use

40° C / 104°F

Spray gun weight

496 g / 17.5 oz.

Materials of construction

Gun body / Manifold / Micrometer Assembly

303 Stainless steel, 6082 Aluminium Alloy

Tip / Needle

Hardened 303 Stainless steel.

Fluid seals

Viton Extreme, Polyethylene, PTFE

Type of

Gun

Air Cap Type

(See Table 1)

Fluid Nozzle Size

(See Table 2)

Hardened

PARTS LIST

REF.

DESCRIPTION

PART NO.

QTY.

AIR CAP ASSEMBLY

SEE TABLE 1, p5

FLUID NOZZLE KIT

SEE TABLE 2, p5

FLUID NOZZLE

(a)

SEPARATOR - KIT OF 5

SP-626-K5

(a)

BODY

NEEDLE PACKING KIT

SPA-408-K

NEEDLE PACKING - KIT OF 2

SPA-118-K2

(b)

PACKING NUT

(b)

O-RING

(b)

PISTON ASSEMBLY

SPA-409-K

E CIRCLIP

O-RING

PISTON

O-RING

(c)

FLUID NEEDLE

SEE TABLE 2, p5

PISTON SPRING

SPA-123-K

MICROMETER ASSEMBLY

SPA-405-K

MANIFOLD ASSEMBLY

SPA-410-K

MANIFOLD

(d)

SCREW KIT

SPA-411-K

GRUB SCREW

(d)

M4 TORX SCREW

(d)

O-RING KIT

SPA-412P-K

O-RING

(d)

O-RING

(d)

ELBOW FITTING - KIT OF 2

SPA-136-K2

(d)

PUSH FITTING - KIT OF 3

SPA-137-K3

(d)

a= Included with Fluid Nozzle Kit

b= Included in Needle Packing Kit SPA-408-K

c= Included on Fluid Needle

d= Included with Manifold Assembly SPA-410-K

Dimensions

A - FLUID INLET (x2) 1/8” BSP

B- TRIGGER / CYLINDER AIR INLET 1/8” BSP

C- LENGTH AIR INLET 1/8” BSP

D- PATTERN AIR INLET 1/8” BSP

E- M6 MOUNTING HOLES (x2)

F- M4 BODY / MANIFOLD CONNECTION HOLE

Air Connection

Maintenance

Key to Symbols

Fan air supply

Pressure regulator

0-1 Bar / 0-15 psi recommended

12 Bar / 174 psi maximum

Trigger / Cylinder Air

3/2 Valve

3.5-6 Bar / 51-87 psi

Atom air supply

Pressure regulator

0-1 Bar / 0-15 psi recommended

12 Bar / 174 psi maximum

Lubricate with Petroleum Grease

Tool type & size required

Component direction arrow

For dis-assembly and sequence

number. (Reverse sequence to

Re-assemble).

Important: The spray gun must be earthed to dissipate any electrostatic charges which may be

created by fluid or air flows. This can be achieved through the spray gun mounting, or conductive

air/fluid hoses. Electrical bond from the spray gun to earth should be checked with an Ohm meter.

A resistance of less than 106 Ohms is recommended

MAINTENANCE

Body Removal

T20

WARNING –Check all air and fluid pressure is removed before starting maintenance.

1.8-2.0 Nm

1.3-1.5 lbf.ft

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