prEN ISO 17420-3

Respiratory protective devices - Performance requirements - Part 3: Thread connection prEN ISO 17420-3

Scope

This part of ISO 17420 is applicable to an unassisted filtering device and specifies a standard thread
connection between a filter and the respiratory interface as required in ISO 17420-2.
This part of ISO 17420 also includes the description of test simulators that are necessary for the
assessment of some of the requirements.