HVLP Paint Gun: the Basics
What do you understand by the HVLP SYSTEM ?
Answering this asking will not hard. The HVLP systems is updated smart method. It means simply High Volume, Low Pressure. Now a days this proven method became very popular for their smooth finish and fast working. This procedure, the gun uses a high volume of air for sufficient atomization. This atomized air is going through the gun to atomize the paints. This paints produce it a very low pressure.
Based on Different types of spray guns, they produce different quality finish. They help to minimizes overspray and a small amount of paint waste. Intern, the results are great. It can help possible to get achieve smooth, even coverage results.
All traditional old guns can capable to spray paint at 50 PSI. In this case, most Different types of HVLP guns sprays at low pressures to compel paint and around 10 PSI only. When material provided there will be a lot of that low pressure air moving out (larger volume). While they worked enough atomizing the paint and applying it, they also wasted a lot, also. This system, therefore, capable to spray every thick materials the quick way. So, HVLP system is more efficiency, money savings, smooth finish, eco friendly use. Even through, you can purchase a standard HVLP Spray gun will usually more than a conventional gun (typically it found from 150 – 250 dollars more).
Each type of guns have also some advantages and disadvantages. There are two types of HVLP guns are available in the current market. These are : HVLP guns and conventional compressed air spray guns.
CONVENTIONAL SPRAY GUNS
They create high pressures by using compressed air to produce high volume of paint. It mostly depends the wide of coatings and how finely atomized the paint. This compressed air can be atomized by increasing the pressure and atomization process can be higher than HVLP. That is why, transfer speed is significantly minimized to around 35% and outputs high finish quality with the PSI values . Some paints may waste and maximized coating cost high. They also available in cheap prices than HVLP guns.
HVLP SPRAY GUNS
HVLP system uses high volume of air instead of than high pressure to spray paint. The advantages is that it convert it to a very low pressure. For this reason, it minimizing paint expenses and overspray. Even, with the input about 50 psi values, only ten psi can spray out through the cap. High volume and Low pressure is the perfect system to increase productivity and save time as well as money.
Do you know how a spray gun works ?
An air compressor uses an air moving through the gun under lower pressure. HVLP spray guns can easily creating about 25 pounds of pressure per square inch to propel paint. They are cost effective; but less efficient while using. Another type of HVLP gun works an upgraded turbine system instead of an air compressor. They capable to create high volumes of air with lower pressure that approximately six pounds per square inch. This make it more convenient even for consumer with busy schedules. Although, They founded with high prices, but also more effective that it doesn’t require to buy any air compressor separately.
HVLP Vs Conventional Spray Gun
Readers will likely ask about the comparison of HVLP Spray Gun and old Conventional Spray Gun performance. Its much depends mainly air pressure. Some times it differs production speed, and finish quality and coatings. This difference comes from their various air caps. Here, we’ll like to compare these two general types of spray guns and their performance. Here’s some difference Conventional spray gun vs. HVLP sprayers to help you choose the right one what to expect from your equipment.
Each type of air caps are quite complex to atomizing the coating well. Depending on the coating being sprayed, they executes in more or less transfer speed.
We describe few listed difference are given below:
Having their high pressures of conv. Guns turn paint into finely atomized mist, offering thinner coatings and solid finishes. On the other hand, HVLP guns are opposite process. They use low pressures to create thicker coat. Their limit overspray minimizes coating waste over your job.
Better Transfer speed:
Conventional Compressed air sprayers achieving a comparable TE but fluid delivered to less speed from HVLP. This HVLP gun’s transfer speed usually very high. They delivered a large amount of paint over your surface.
These two system differs mainly air pressure. Conventional guns use high pressure to produce low volume of paint. HVLP system uses a large volume of air and convert it to very low pressure.
A good HVLP gun price range is from (15-250) Dollars Plus in current market. Those user who have very poor budget or intend to buy cheap one, this conventional gun is the right one for them.
HVLP uses very thick coating painting purpose. They are capable to apply about 65% of materials. Most people uses it auto body painting purpose due to fine finishing quality. You can easily paint Car, Boats etc.
A conventional gun systems transfer efficiency minimized at around 35%. It can uses epoxy and Zincs coatings purpose.
If they are everything properly setup, the solid production rates and finish quality achieved by HVLP system.
HVLP spray gun full setup process
How To Install & Set It Up ?
HVLP spray gun adjustment process isn’t simple. Just lack of proper set up knowledge, sometimes you’re rightfully quite nervous about installing it all up. How ever, It takes planning and can be slightly different for different types of spray guns. Although, this is a time consuming process, but they offer a quality finish. The results are great. When needs to high requirements to set up, this brief easy guide will definitely help to began job step by step as follow.
Getting ready practically
This is an important starting point for information on the set up, you can assemble this practically by considering the three basic controls. These are : First term is select the proper fluid air supply. 2ndly, select the right tip for your job and lastly set it properly. Now that you’re ready to achieve the most output from your equipment.
HVLP gun takes the high volume of air at the place of enter the gun. So, the proper air supply play an important role over the HVLP gun process. The base of coating manufacturer, you can understand the gun directions that the amount of less cfm air (cfm- Cubic Feet per Minute) required to build up the pressure.
So make sure your compressor is contain enough free space to capable minimum cfm. You can set your compressor about 90 psi. and need an air dryer to work the lines clear. They make tiny knobs with gauges that installed to the base of your gun. Keep away any water or oil in air lines.
Second, select the proper tip for what you are spraying.
This step you need to pick a fluid tip for the job. Choosing the smallest tip possible ranges from various types. It will be a perfect option to select the most suitable one,. The manufacturer provided The specific tech sheet for the material provided by the company usually have a recommended tip size. Generally, A 1.0 tip uses for smaller jobs like a single panel or small part. When you need applying paint big size jobs, a 1.3 or 1.4 tip may be the right one. If you’re spraying with primers, you may want to go as bigger size tip as 1.8 or 2.3. It most depends on your job thickness and coating materials.
Tip selection for your job may not so easy. For this reason, we brought back this guide with new resources and helpful reminders for inspiration and implementation. You can read our best tip selection guide.
Third, lets set it up!
Once you select your tip matches your job as different types of spray guns. Plan to began by taping a piece of masking paper/old cloth on the surface. To get better result you’ll need this spray test. Set up that tip on your gun, then you’re ready to set up the gun itself. You can find some additional information on the manufacturer manual .
Setting up your gun
Spray gun setup is not a hard job. Just need to set the pressure and volume as advised by the gun manufacturer at your gun’s inlet. By using supplied air knob with gauge (you added to the gun set it with the trigger pulled at around 50 psi to start. This time your gun may have a maximum speed, but they are often on the minimum level. Most user run them from 40 psi to 60 psi speed. Close the air volume control knob (which stands beside the air hose enters the gun) and with the trigger still pulled, open it up to the point at which the air volume starts to remain the same and stop. When tested the knob, then tapped on the pressure gauge to get adjustable pressure settings.
Next, Get ready for the next step so that you can Mini HVLP spray gun setup. Okay, guys, let’s just go with a fan control knob which generally located at the top of your gun. You will need to open it. Then, hold the gun for a second aimed at the masking paper. As if you are going to paint about 6 inches away from the wall, the fan also should be about six inches high. After successfully install the fan control, leave it alone. open the fan control knob until you are able to get it to 6 inches high. Then you would have to began pull the trigger gun, turn the material knob until it seats and completely unscrew it about two and one-half turns.
After completing some of the prep. works pass and failure process, we’re ready to spray test. Keep your gun at the paper on the wall where you’re going to paint it. You must ensure that you hold it at 6 inches distance. You can watch a cigar-shaped pattern appear on the masking paper. By turning fan control knob you can adjust it easily. Until you get it about 6 inches tall at 6 inches from the paper. You may look in the center of the surface is good coverage but in the edges you may fade away.
If it isn’t, adjust it with the fan control knob, usually located at the top of your gun.
Few problems fixed
If your gun is spraying too much material, screw in the material knob slightly. If that doesn’t help, try to put it back to where it was and turn down the air pressure on your regulator. If you face further any operating trouble we suggest to see how they solve here.
Tune your HVLP gun
By tuning your HVLP gun, one can get the smallest possible paint droplets except losing full coverage. when spraying may happen some problem. But they will be easily fixed or solved. If the spray pattern isn’t what you wanted or If you see too much density on the sides and not enough in the middle. Probably the cause is your air flow is too much high. You can just screw down the material knob a little bit more and try minimizing air pressure. On the other hand, If you see there is too much material in the middle and not much at either end, you may have too little air flow.
When you found the expected result then you’re ready to spray your job.
At this point you can’t understand about the proper pressure levels or CFM (cubic feet per minute), check your gun’s directions and need ensures a powerful air compressor. On the base of gun, one can adjust air pressure by rotating the regulator. 2ndly, an air dryer to keep your lines dry.
Adjustable Air pressure settings and volume
For well set up and adjustable paint spray gun pressure settings you need take some experiments and practice . If found few problem fix it carefully. Need to follow up that your spray fan is about 6 inches high. If it isn’t, adjust it with the fan control knob above way.
To sum it up:
In most painting works, an HVLP gun is the better choice option where the lower air pressure required. They offers most efficiency and quite versatility that encourage to spray in most areas. Having their high Transfer Efficiency and lower setup parameters, HVLP spray guns may be the perfect solution for high quality coatings. You already learn how Mini HVLP spray gun setup. So, now you can put your knowledge practically with the most suitable ones. For now, taking on a large painting/finishing job, HVLP system must be first consideration. They will work for you to get possible finish quality for your job in future time.
See how more of the best spray gun brands on global market are facing their quality finishing challenges. Read our some of selected Best HVLP Gun technique to get high quality painting job.