Campbell Hausfeld HV2105 Operation, Preparing to Spray, Spray Patterns, Using Your Spray GUN

Operating Instructions and Parts Manual HV2100, HV2105

HVLP Paint Sprayers

Pre-Operation (Cont.)

PREPARING TO SPRAY

After some practice, you should be ready to spray your coating of choice on your work piece. (See the Operation section for more information on spray patterns, spray gun use, and other usage procedures). Good quality results with your HVLP system are a combination of:

-Careful preparation of your project

-A proper spraying environment

-A basic knowledge of the coatings you will be using and how these coatings work with your spray equipment

-Close adherence to safety precautions

Operation

SPRAY PATTERNS

Your spray gun offers you many options. You can adjust (click) the air cap to three positions. One will produce a horizontal pattern for spraying across, another will produce a

vertical pattern for spraying up and down, and the third will produce a round pattern to spray small or narrow pieces. (See Figure 2.)

USING YOUR SPRAY GUN

Your spray gun is certified High Volume Low Pressure. This means your spray gun only uses from 3 psi to 10 psi (depending on your turbine unit) of air pressure measured at the air cap. All passages and air ports are much larger than on a conventional spray gun. If one of these air passages becomes blocked, or buildup of material starts to occur, your spray pattern will become distorted. Therefore, always keep your spray gun clean.

Your spray gun comes fitted with a 1mm tip/nozzle and needle inscribed with the number “2”. This will cover about 85% of all the materials/coatings that you will spray. Using this size tip/nozzle and needle, you can achieve a 1/4" line up to a 10" fan pattern just by rotating the air cap to the desired fan type (see Spray Gun Diagrams), opening the material flow knob counterclockwise and moving the

spray gun closer or further away from your work piece. A little practice will enable you to master this technique.

PRACTICE: Practice using your spray gun by following these steps:

1.	Remove the cup from your spray
	gun. Fill it halfway with some
	water.
2.	Attach the cup to the body of the
	spray gun.
3.	Attach the spray gun to the air
	hose.
4.	Turn the turbine unit on.
5.	You will notice air is now flowing
	through the air cap. This is normal
	and correct.
6.	Position the air cap in the
	horizontal position (see Figure 2)
	and turn the material flow knob
	counter clockwise approximately 1
	to 1-1/2 turns.
7.	Point the spray gun away from
	yourself (and anyone else) and pull
	the trigger all the way back. You
	should see a “V” shaped mist (or
	triangle) called a fan pattern.
8.	Now, with the trigger depressed,
	slowly begin to turn the material
	flow knob clockwise (closing).

	Viscosity
Type of Coating	Amount to Thin/Reduce (Typical)
Lacquers	25-50%
Sanding Sealer	20-30%
Enamels	20-40%
Stains	Use from can
Acrylic Enamel	50-60%
Catalyzed Polyurethane	10-30%
Polyurethanes, Varnishes	20-30%
Waterborne Coatings	0-10%
Latex Paint, Emulsion Paint	10-40%

NOTE: The amount of thinning needed will depend on the model turbine used, flow out properties of the coating, and the desired appearance of the finished work piece. It is best to test spraying results prior to thinning.

Table 4 - Types of Coatings, Recommended Amount of Thinning

Notice that the fan pattern is

beginning to get smaller.

9. Turn the material flow knob

counterclockwise and notice the

pattern get larger.

10. Take a large piece of cardboard

and direct the pattern at the

surface. Turn the material flow

knob 2 full turns and hold the spray

gun approximately 6" from the

surface.

11. Pull the trigger. Observe the

outline and size of the pattern.

12. Turn the material flow knob

clockwise (closing). Move the spray

gun 1-2” closer to the surface.

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