In our purchase of spray guns, sellers often boast that their products when the low-pressure spray gun, spraying effect is excellent; when high-pressure spray gun, suitable for spraying high-viscous paints. Is this a correct understanding?
Correct, but not comprehensive. By high-pressure spray gun and low-pressure spray gun, we mean a spray gun that uses compressed air to spray materials into the surface, usually with an air pressure1.5-4.5 Bar. Customers typically choose the suitable spray guns according to spraying, purchase budget, local policies, etc.
How do you distinguish between a high-pressure gun and a low-pressure spray gun?
It is clear and will be from the inlet air pressure, the operating air pressure to distinguish. We generally call the gun into the air pressure 0.5-2.5Bar low-pressure gun, into the air pressure between 3.5-4.5Bar become a high-pressure gun.
What are the pros and cons of high and low-pressure guns?
High-pressure spray guns
PROS
-For paint viscosity requirements are not high, fine atomization, fast transfer speed, high efficiency
-Simple and easy to start, do not need too much spraying skills, suitable for DIY enthusiasts
CONS
-Low transfer efficiency only 25-35%, large dispersion, waste of paint
-Large-capacity air compressor required
-Pollution of the environment impact painter’s health
Low-pressure spray guns
PROS
-Good atomization performance, slight overspray, less bounce, the high transfer efficiency of more than 65%
-Equipped with a small air compressor
-Required by VOCs directive
CONS
-Required the flow of materials; a certain amount of thinner is needed
-Need some spraying skills, not friendly to newcomers
-Low transfer speed and reduced production efficiency
So for their disadvantages, there is currently a medium-pressure gun on the market, his intake pressure between 2.0-2.2bar, the atomization of the acceptable degree of moderate, but can significantly improve working efficiency.
