Respiratory protective devices - Powered filtering devices incorporating a loose fitting respiratory interface - Requirements, testing, marking

This document establishes comprehensive requirements for powered air-purifying respirators equipped with independent respiratory protection barriers. It outlines specific procedures for testing the effectiveness of these devices in ensuring adequate separation between the user's breathing zone and the ambient environment. The scope includes criteria for marking the equipment to ensure clear identification of performance characteristics and limitations. Detailed guidelines are provided for the evaluation of filtration efficiency, airflow dynamics, and structural integrity under operational conditions. The text specifies methods to verify that the independent barrier functions as intended during use, thereby minimizing the risk of contaminant ingress. Procedures for determining the suitability of the equipment for various hazardous atmospheres are included, alongside instructions for maintaining consistent performance over time. This specification aims to harmonize the technical parameters for such respiratory protection devices across the relevant market, facilitating consistent quality and safety standards. It serves as a foundational reference for manufacturers and testing laboratories in the design and assessment of these complex personal protective systems.