DIN EN 405:2009 呼吸防护器.防毒气或防毒气与粉尘的带阀过滤半罩式面罩.要求,检验,标识(包括修改件A1-2009).英文版本DIN EN 405-2009-08
Respiratory protective devices - Valved filtering half masks to protect against gases or gases and particles - Requirements, testing, marking (includes Amendment A1:2009); English version of DIN EN 405:2009-08
This European Standard specifies the performance requirements, test methods and marking requirements for
valved filtering half masks incorporating either gas or combined filters as respiratory protective devices except for
escape purposes. It does not cover gas filtering half masks which do not have valves or are fitted only with
exhalation valves. It does not cover devices designed for use in circumstances where there is or might be an
oxygen deficiency (oxygen less than a volume fraction of 17 %).
Laboratory and practical performance tests are included for the assessment of compliance with the requirements.