Let’s review the airless paint sprayers as below to help Customers better know it for proper operation.
Part 1. What is an Airless Paint Sprayer?
It is a tool used to spray a variety of surfaces with your favorite latex, oil or stain.
Instead of using an air compressor to push the air out, they use a pump that builds pressure first. Then you utilize a spray gun or nozzle attached to a high pressure pump to propel a coat of paint on the desired area. The tips on the spray gun vary depending on the desired result or affect you are trying to achieve. For instance, We Dino-power has around fifty different tip size used for various types of spray or patterns.
The tip size helps to control the flow of paint and the pattern wideth of the spraying.
This means that you can get a heavy to light layer by choosing a specific type of spray tip.
When purchasing a sprayer, there will be the recommended tip included with the sprayer. This usually covers the basic jobs, but if you are a pro or contractor, you’ll likely need various others to get fantastic results on the different job sites.
Part 2. Principle of Airless Painting
The general principle of airless painting is this, the high pressure airless pump increase
the pressure of the paint material/coating to 210 bar to make it fully atomized,
then uses different tip sizes to achieve desired atomization and spray pattern size.
Part 3. Highlighted Advantage of Airless Painting
1. The coating penetrates better into pits and crevices.
2. A uniform thick coating is produced, reducing the number of coats required.
3. A very “wet” coating is applied, ensuring good adhesion and flow-out.
4. The speed is 5 times of traditional brush, 3 times faster than the roller.
5. The airless paint spraying save more paint material compare to the Traditional air spraying.
Part 4. Performance of Airless Sprayers
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 injuiry,
such as injection injuries, due to the paint ejecting from the nozzle at high pressure.
Airless sprayers can be powered by different types of motor: electric, compressed air (pneumatic) or hydraulic.
Most have a fluid 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 sprayers 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.
Part 5 . Pricing of Airless Sprayers
The pricing of airless sprayers differs due to different types
(DIY,Semi-professional and Professional),
the pricing of DIY type is around USD100-USD150(DP-6388B recommended),
the pricing of Semi-professional type is around USD250-USD350 ,
and the pricing of profesional type is around USD400-USD1000 .
Part 6. Tips for Maintenance of Airless Sprayers
1. Please clean the machine throughly everytime when you finish your painting job,
otherwise the dried paint could damage the pump easily.
(Please use water for cleaning the latex or other water-based paint,
just spray 2 minutes and use the thinner as solvent for cleaning the oil-based paint.)
2. Please add the lubricating oil into the fluid pump everyday before you start your painting job.