What are the two main components of an SCBA?

The two main components of a Self-Contained Breathing Apparatus (SCBA) are the air cylinder and the facepiece. The air cylinder is essential as it stores the breathable air that the user relies on in environments where the air is contaminated or insufficient. This component ensures that the user has access to a supply of air that can support breathing while engaged in hazardous situations.

The facepiece, on the other hand, serves as the interface between the user and the air supply. It encapsulates the user's airway and provides a tight seal to prevent outside air from entering, ensuring that the air inhaled is clean and that the user can breathe safely. Together, these two components make up the primary functional aspects of an SCBA, allowing for effective protection and breathing in dangerous environments.