What grade of air is used for a Type C respirator?

Type C respirators are specifically designed to be used in environments where the air quality is not immediately dangerous to life or health, but where specific respiratory hazards may be present. In order to ensure the safety of workers using these respirators, the air provided to them must meet certain quality standards.

Grade D air is the appropriate standard for Type C respirators as it is uncontaminated and safe for breathing, designed to support good respiratory function without harmful levels of contaminants. This grade of air must contain no more than 10 parts per million (ppm) of contaminants such as carbon monoxide and must have a minimum of 19.5% oxygen.

Other grades of air, such as Grade A, B, and C, are not suitable for Type C respirators, as each of these may have higher levels of impurities or specific restrictions that render them unsafe for extended use in breathing apparatus. This distinction highlights the importance of using the correct grade of air to maintain the health and safety of workers in environments with potential respiratory hazards.