Shopping for airless paint sprayer? Read about types, features, and other must-know topics in our paint sprayer buying guide. Find the best airless sprayer based on our professional paint gun reviews. Read more about which paint spray gun that is the best for your specific needs.
Best Airless Paint Sprayer
Surely, these airless spray gun are not for everyone as some of them carry a hefty price-tag.
With that said, one thing can be said for sure, these airless paint sprayers are good enough to make it to our list of the top best Airless Paint Sprayer.
About Airless Paint Sprayer
Spray painting is a painting technique where a device sprays a coating (paint, ink, varnish, etc.) through the air onto a surface. The most common types employ compressed gas—usually air—to atomize and direct the paint particles. Spray guns evolved from airbrushes, and the two are usually distinguished by their size and the size of the spray pattern they produce. Airbrushes are hand-held and used instead of a brush for detailed work such as photo retouching, painting nails or fine art. Air gun spraying uses equipment that is generally larger. It is typically used for covering large surfaces with an even coating of liquid. Spray guns can be either automated or hand-held and have interchangeable heads to allow for different spray patterns. Single color aerosol paint cans are portable and easy to store.
Air gun spraying
This process occurs when paint is applied to an object through the use of an air-pressurized spray gun. The air gun has a nozzle, paint basin, and air compressor. When the trigger is pressed the paint mixes with the compressed air stream and is released in a fine spray.
Types of nozzles and sprays
Due to a wide range of nozzle shapes and sizes, the consistency of the paint can be varied. The shape of the workpiece and the desired paint consistency and pattern are important factors when choosing a nozzle. The three most common nozzles are the full cone, hollow cone, and flat stream. There are two types of air-gun spraying processes. In a manual operation method the air-gun sprayer is held by a skilled operator, about 6 to 10 inches (15–25 cm) from the object, and moved back and forth over the surface, each stroke overlapping the previous to ensure a continuous coat. In an automatic process the gun head is attached to a mounting block and delivers the stream of paint from that position. The object being painted is usually placed on rollers or a turntable to ensure overall equal coverage of all sides.
High volume low pressure
High volume low pressure (HVLP) is similar to a conventional spray gun using a compressor to supply the air, but the spray gun itself requires a lower pressure (LP). A higher volume (HV) of air is used to aerosolise and propel the paint at lower air pressure. The result is a higher proportion of paint reaching the target surface with reduced overspray, materials consumption, and air pollution. A regulator is often required so that the air pressure from a conventional compressor can be lowered for the HVLP spray gun. Alternatively a turbine unit (commonly containing a vacuum cleaner derived motor) can be used to propel the air without the need for an air line running to the compressor.
A rule of thumb puts two thirds of the coating on the substrate and one third in the air. True HVLP guns use 8–20 cfm (13.6–34 m3/h), and an industrial compressor with a minimum of 5 horsepower (3.7 kW) output is required. HVLP spray systems are used in the automotive, decorative, marine, architectural coating, furniture finishing, scenic painting and cosmetic industries.
Low volume low pressure
Like HVLP, Low volume low pressure (LVLP) spray guns also operate at a lower pressure (LP), but they use a low volume (LV) of air when compared to conventional and HVLP equipment. This is a further effort at increasing the transfer efficiency (amount of coating that ends up on the target surface) of spray guns, while decreasing the amount of compressed air consumption.
Electrostatic spray painting
Electrostatic painting was first patented in the U.S. by Harold Ransburg in the late 1940s. Harold Ransburg founded Ransburg Electrostatic Equipment and discovered that electrostatic spray painting was an immediate success as manufacturers quickly perceived the substantial materials savings that could be achieved. In electrostatic spray painting or powder coating, the atomized particles are made to be electrically charged, thereby repelling each other and spreading themselves evenly as they exit the spray nozzle. The object being painted is charged oppositely or grounded. The paint is then attracted to the object giving a more even coat than wet spray painting, and also greatly increasing the percentage of paint that sticks to the object. This method also means that paint covers hard to reach areas. The whole may then be baked to properly attach the paint: the powder turns into a type of plastic. Car body panels and bike frames are two examples where electrostatic spray painting is often used.
Airless spray guns
These operate connected to a high pressure pump commonly found using 300 to 7,500 pounds per square inch (2,100–51,700 kPa) pressure to atomize the coating, using different tip sizes to achieve desired atomization and spray pattern size. This type of system is used by contract painters to paint heavy duty industrial, chemical and marine coatings and linings.
Advantages of airless spray are:
The coating penetrates better into pits and crevices.
A uniform thick coating is produced, reducing the number of coats required.
A very “wet” coating is applied, ensuring good adhesion and flow-out.
Most coatings can be sprayed with very little thinner added, thereby reducing drying time and decreasing the release of solvent into the environment.
Care must be used when operating, as airless spray guns can cause serious injury, such as injection injuries, due to the paint ejecting from the nozzle at high pressure.
Airless pumps can be powered by different types of motor: electric, compressed air (pneumatic) or hydraulic. Most have a paint pump (also called a lower) that is a double acting piston, in which the piston pumps the paint in both the down and the upstroke. Some airless pumps have a diaphragm instead of a piston, but both types have inlet and outlet valves.
Most electric powered airless pumps have an electric motor connected through a gear train to the paint piston pump. Pressure is achieved by stopping and starting the motor via a pressure sensor (also called a transducer); in more advanced units, this is done by digital control in which the speed of the motor varies with the demand and the difference from the pressure set-point, resulting in a very good pressure control. Some direct drive piston pumps are driven by a gasoline engine with pressure control via an electric clutch. In electric diaphragm pumps, the motor drives a hydraulic piston pump that transmits the oil displaced by the piston, to move the diaphragm.
Hydraulic and air-powered airless pumps have linear motors that require a hydraulic pump or an air compressor, which can be electric or gasoline powered, although an air compressor is usually diesel powered for mobile use or electric for fixed installations. Some airless units have the hydraulic pump and its motor, built onto the same chassis as the paint pump.
Hydraulic or air powered airless provide a more uniform pressure control since the paint piston moves at a constant speed except when it changes direction. In most direct drive piston pumps, the piston is crankshaft driven in which the piston will be constantly changing speed. The linear motors of hydraulic or compressed air drive pumps, are more efficient in converting engine power to material power, than crankshaft driven units. All types of paint can be painted by using airless method.
Great Thing About Airless Paint Sprayer
Few of us look forward to painting but most of us really appreciate an updated look for our homes. An airless paint sprayer can make the whole home renovation project way easier. After trying one of these products you may never look back to the traditional rollers and paintbrushes any time soon.
I first discovered the airless paint sprayer during a search for easy to use home improvement products. The system seemed too good to be true and I thought that there had to be some kind of catch but after reading more about the airless paint sprayer, I was sold. Good thing, too, because I have saved hours and hours of work for myself during my various projects around the house.
The great thing about the airless paint sprayer is that it can be used both indoors and outside. I find this to be one of the most valuable features of this painting supply product. I originally thought that the airless painter would only be appropriate for outdoor use but this product can be used indoors with ease and without the worry of a big mess.
The airless paint sprayer is ideal for indoor use because it offers limited overspray which insures that you will not paint anything that you don’t want to cover. The surprisingly precise instrument has been a real life saver for my home renovations and it is proving to make its mark on my outdoor projects as well.
Outdoor upkeep can be a real pain but with the quick and efficient airless paint sprayer I found my outdoor painting projects to fly by in little time at all. Also, the product is really light and easy to carry making the project easier than I ever dreamed possible. I didn’t have to worry about spills and I didn’t have to carry a bunch of holders and accessories on the project.
After using the product I was almost sorry to see my painting projects completed. I have little worry because I have plenty of painting to do for my hobby. Updating and reselling old furniture is a real passion of mine. The airless paint sprayer even works on difficult to paint items like wicker.
I recommend the airless paint sprayer for anyone who has home renovations but I also highly recommend the product for anyone who has a hobby that involves painting and refinishing furniture. The airless paint sprayer is a real time-saver.