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 |
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 |
| |
| Sanding Sealer |
| |
| Enamels |
| |
| Stains | Use from can | |
| Acrylic Enamel |
| |
| Catalyzed Polyurethane |
| |
| Polyurethanes, Varnishes |
| |
| Waterborne Coatings |
| |
| Latex Paint, Emulsion Paint |
|
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 |
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