Which part of a pneumatic filter removes smaller dirt particles from the air?

• A. Screen
• B. Mesh
• C. Core
• D. Element

Answer: (D)

In pneumatic filtration, the part that actually traps dirt and removes smaller particles from the air is the filter element. This is the porous medium through which the air flows, and it is designed with fibers or depth-loading materials that grab particles as they pass. Small particles are captured by the extensive surface area and the multiple layers of the media, using mechanisms like diffusion and interception as air threads through the pleated or dense structure.

A screen or mesh typically acts as a pre-filter to catch larger debris before the air reaches the main filtering media, helping protect the element and extend its life. The core, meanwhile, provides structural support for the element and doesn’t filter air by itself. So the element is the component responsible for removing small dirt particles from the air.