What does it mean to 'bleed' a pneumatic system?

In the context of a pneumatic system, 'bleeding' refers to the process of releasing trapped air that may create potential problems in the system's operation. Trapped air can lead to inconsistent performance, inefficiencies, or even damage to components due to pressure build-up. By bleeding the system, you ensure that it is functioning effectively and that the components are not under undue stress from excess air pressure. This process is vital for maintaining optimal performance and safety within pneumatic systems, allowing them to operate smoothly and as intended.

While refilling the system with air, checking air pressure, or cleaning the system are all relevant maintenance activities, they do not specifically address the critical task of removing trapped air that may hinder system performance.