Final answer:
Spray guns are usually classified as either a suction-feed or gravity-feed type.
Step-by-step explanation:
Spray guns are usually classed as either a suction-feed or gravity-feed type.
In a suction-feed spray gun, the liquid is drawn up from a container using a suction created by compressed air passing through the gun. This type of spray gun is commonly used when a small amount of liquid is required. On the other hand, in a gravity-feed spray gun, the liquid is fed into the gun from a container placed above the gun. The force of gravity ensures a continuous flow of liquid into the gun. Gravity-feed spray guns are ideal for larger projects that require a higher volume of liquid.