DeVilbiss SB-2-546 User Manual download pdf (Page 8)

Topcoat lacquer Frovides build,

rotection and brings

out

the beauty of

!he wood and the finishing technique.

is very important when applying

topcoat lacquer that the spray gun fluid

ressure and atomization pressure for

!he gun is properly established. The

correct fluid and air pressure provide

the

most

efficient application in relation

product size, speed of the conveyor

and load. In addition, take care that the

Equipment specifications and diagrams

are included on a separate fold-out found

in the back pocket of this booklet. Refer

Diagram A for additional information

on typical gun set-ups and fluid flow

range.

To achieve the finest finish qua!@' when

spraying during

coat

recommend

the

lowing:

CleanAir" Air Control Unit

proper tips and needles are always used.

Common Terms

The followin terms are also used when

lacquer.

Lacquer

Clear Coats

Finish

Topcoats

Equipment Requirements

When topcoating with lacquer,

the typical fluid delivery rates range

between 20 and 30 ounces per minute.

We recommend the following air spray

and HVLP gun set-ups:

referring

tot

application of topcoat

Air Spray

JGV-570-704

(.055")

MSA-501-704L

(.055")

Color lacquer only:

JGV-570-765

(.055)

JGV-570-797

(.055")

MSA-501-264L

(.055")

JGHV-5465-FF

(.055")

MSV-546-4-FF

(.055")

HVLP

(Choose one)

HFRL-509, centrifugal,

2 regulated, 1 main, 80 CFM

HFRL-512, centrifugal/coalescer

2 regulated, 1 main, 80 CFM

See page 15 for other models.

Air

Hose

!Specify Length)

H-1921

/16"

I.D. Smooth

Cover or H-1901

V16"

I.D.

Corrugated Cover with

P-HC-4527

I/d'

NPS

three-

Fluid Hose (Specify Length)

For Solventborne Material:

H-1973-1

3/s"

I.D. Nyliner

with P-HC-4548

V8"

NPS

(F)

three-piece reusable fitting.

For Waterborne Materials:

H-1973-1

3/8"

I.D. Nyliner

with P-HC-4561

three-piece reusable stain ess

steel swivel fitting.

(Specify Capacity)

For Solventborne Finishes:

QMGT Galvanized Tank

ASME Code) with or without

S-501 2 Rotary Agitator or

PT Zinc Plated (Non-Code)

242 gallon tank with or

without Agitator.

For Waterborne Materials:

QMST Stainless Steel ASME

Reciprocating Agitator and

QMS-4010 Extra Sensitive

piece reusable swive

itting.

3/8"

NPS

(IF'

Pressure Tank

Code) Tank with QSR-

See pages

15 for further informa-

tion on this finishing equipment.

Typical Furniture Finishing Setups

Refer

the foldout found in the back

pocket of this booklet for diagrams of

typical furniture finishing setups:

Solventborne System with

QMGT Code Tank (see

Diagram B)

-Waterborne

stem with

QMST Code 6nk (see

Diagram C)

Operating Tips

Operating an HVLP

ray gun differs

air spray gun. Here are a few guide-

lines

keep in mind:

Due

HVLP's higher transfer

very little from opera

ing a conventional

efficiency, the fluid flow rate must be

lowered. Start with 15-25% less than

with a conventional gun.

Slower particle velocity !equjres that

the gun be held six

eight inches

from the target, compared

the 10

12 inch distance for conventional

guns.

Topcoating with lacquer procedures

re uire similar maintenance on both

HQLP and air spray guns. Some

general operating tips include:

Material should be monitored by

uniformity of mil thickness.

Use "Solvent Saver" hose and gun

cleaner

pur e all catalyzed

material and a\ wiping stain from

fluid system before pot life runs

out. See page 12.

Reduce atomizing air.

Check flow rates daily.

Clean build-up from gun tips and air

caps as required.

Do not use ball or needle valves

adjust air pressure. Use regulators.

Always use the lowest fluid and air

pressure gossible.

Lubricate gun daily.

Before production spraying, test for

atomization quality, pattern sha

or coverage desired.

Topcoat can be extremely abrasive

and corrosive if catal zed, causing

check tips by monitorin spray

Use stainless steel wetted arts for

catalyzed and waterborne (nishes.

pattern

uniformity

and

propers

ade

excessive needle an

dyt

ip wear-

pattern and material lea

age.

courtesey

Thomasville Furniture; Thomasville, North Carolina

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DeVilbiss SB-2-546 User Manual Page 8

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