How to Operate an HVLP Paint Sprayer – An Extensive Guide

How to Operate an HVLP Paint Sprayer

How do you spray surfaces efficiently while enjoying the process without a struggle? The answer lies in a High Volume Low-Pressure paint sprayer. An HVLP paint sprayer is designed to manage solvent-based coating materials and water-based materials. An HVLP model is designed to minimize overspray and ensure maximum transfer by limiting the air pressure cap. If you have a pretty clear idea of the device, the different parts, and functionality, you will find this guide easy: How to Operate an HVLP Paint Sprayer

How Does The HVLP Paint Sprayer Work?

The device is designed with an HVLP turbine spray system, whether it is handheld or electrostatic. An HVLP's design mechanism is similar to that of a gun. Wherever you are removing the pain, the HVLP will ensure you achieve the desired finish once you are done. The HVLP model is made up of a nozzle, an air compressor, and a paint basin.

The device has an air compressor, and once you trigger the spray gun, a low air compressor ensures the paint releases spray and not droplets. Target the surface and move around for an expert and even finish paint. The spray painter also has a regulator for controlling the amount of paint spray.

How to Operate an HVLP Paint Sprayer - Step By Step Guide

The essence of this device, therefore, is to paint quickly and effectively without wasting any paint. The spray gun makes it easy to gain control of how thin or a thick layer of paint, priming, or varnishing you feel like applying.

1. Choose the Correct Gun

One of the most overlooked steps is choosing the appropriate gun for the job. If you intend on painting a large surface, you should get a fast gun, since regular spray guns are majorly lo-pressure ones. Check the surface layout, how large and small, thick or thin material to be used. Choose the correct size of the spray gun and gun tip.

Spray painting with HVLP models, just like with other systems, has its good and bad sides. One of the most evident benefits of using the HVLP turbine is the increased portability level, as long there is a general-purpose electrical outlet for electricity.

2. Prepare Your Paint

The kind of paint you choose will also determine the finishing of the job. The consistency of the paint is key when selecting paint. Occasionally, when you purchase paint, it is too thick, which means it will not come out as spray. You can incorporate water or additives to thin the paint. Add the proper amount of the thinner and ensure there is an even consistency that will cover the entire surface.

3. Add Paint to The Gun

Filling the HVLP paint sprayer with paint is not an easy task, since the gun tip is very small, and it can get blocked with dirt. Exercise extreme caution, for example, by using a pantyhose or a paint strainer to load the gun container. The strainer is to ensure you fill the correct amount.

Fill the cup to no more than 19mm from the cup's top. Then attach the container lid, and turn the fluid adjusting knob clockwise to hinder fluid needle movement. Twist the spreader valve adjusting knob anticlockwise to open fully. Trigger the gun sprayer on and regulate inlet air pressure at the gun inlet. Twist the fluid regulating knob anticlockwise until the initial thread shows.

4. Select a Suitable Hose Length

The desired result will depend on the hose length. If you are using a short pipe, direct heat is applied to the paint once you trigger the spray gun. Subsequently, wet paint will be released, and it will take a longer time to dry out. A longer hose will reduce the risk of heating.

5. Methods to Apply Your Paint

Steadily hold the HVLP gun in your hand and ensure about 6 inches' distance (about 150-200) mm from the painting surface. You can test spray and if you find the finish too dry, minimize airflow by lowering air inlet pressure if the finish is too damp, lower fluid flow by twisting the fluid adjusting knob clockwise. Boost the air inlet pressure if atomization is extremely coarse.

To reduce the pattern size, turn the spreader valve adjusting know clockwise. If the surface is vertical, begin spraying from above. If not, begin from the most convenient edge and spread the paint to the other edge. Spray the edges first and overlap every stroke a minimum of 75%. Cautiously finish one surface before you get into the next.

Ensure you hold the HVLP paint sprayer perpendicular to the surface you are spraying. Tilting the spray may result in uneven spraying. Make sure you are moving the spray gun at a constant speed. Most importantly, remember to relieve pressure and switch off the air supply when the gun is not used.

How to Disassemble and Clean Your Spray Paint Gun?

After spray painting using the HVLP model, thorough cleaning, disassembly, and reassembly is recommended. Remove any remnant paint from the gun cup. The gun pot should be cleaned paper towels to retain the solvent spray, disposed of once the paint has dried.

Add a tiny amount of solvent into the cup and shake around to cleanse, spraying the solvent via the gun. Add more solvent as desired until there is no more color spraying from the spray gun.

Additional Information

  1. 1
    HVLP spray guns do not remove all overspray and, if used wrongly, may have plenty of overspray's as compared to conventional spray guns.
  2. 2
    HVLP guns linked to the paint pressure pots can spray paint faster and long enough without stopping for a refill.
  3. 3
    The HVLP is used by refinishing specialists in the automotive industry because it can handle the primer for quality auto refinishing and the clear coat and paint. It can be used for building painting, furniture, and marine finishing. 

Bottom Line

It is important to wear protective gear while handling an HVLP paint sprayer. Tiny droplets of paint that are suspended in the air, if inhaled, can cause eye and breathing complications. HVLP spray painter guns are not exactly precision instruments, but for the refinery. Choose your gun carefully and ensure your safety as you enjoy your painting. 

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