What controls the flow of air and fluid in a suction feed gun?

The flow of air and fluid in a suction feed gun is primarily controlled by the gun trigger. When the trigger is pulled, it opens a valve that allows air to flow through the gun and creates a suction that draws the fluid from the paint cup into the air stream. This mechanism is essential for regulating the quantity of paint being sprayed as well as the pattern of the spray.

Other components, such as the air cap and fluid tip, play important roles in shaping the spray pattern and atomizing the paint, but they do not directly control the initiation of fluid and air flow. The paint cup serves as a reservoir for the fluid but does not influence the control of airflow or the distribution of the paint once it is drawn into the gun. Understanding this mechanism helps ensure proper technique and application when using a suction feed gun.