序言这是CSA Z94的第一版。4.1、过滤式呼吸器的性能。本标准旨在支持加拿大的国家呼吸器认证计划。CSA集团承认，本标准的制定部分是通过加拿大标准委员会的资助和支持实现的。本标准的制定符合加拿大标准委员会对加拿大国家标准的要求。CSA集团已将其作为加拿大国家标准发布。范围1。1在范围内，本标准规定了在过滤颗粒物的空气过滤模式下运行的呼吸器的性能要求。 1.2超出范围本标准未涉及以下内容:a）带有气体/蒸汽去除过滤器的呼吸器，将在未来版本中介绍；b） 在大气供应模式下工作的呼吸器，或对组合式呼吸器的大气供应模式的要求；c） 未提供至少达到CAN/CSA Z94中规定的1级防护等级的呼吸防护性能的设备。4-18，如手术口罩或布口罩；d） 呼吸器制造的取样和质量保证要求；和e）呼吸器批准证书的申请、管理和颁发程序。 1.3本标准中的术语“应”用于表示要求，即用户为遵守本标准而有义务满足的规定；“应该”用于表示建议或建议但不需要的建议；“可”用于表示一个选项或在标准范围内允许的选项。注释随附条款不包括要求或替代要求；随附条款的注释的目的是将解释性或信息性材料与文本分开。表和图的注释被视为表或图的一部分，可以作为要求编写。 附件被指定为规范性（强制性）或信息性（非强制性）以定义其应用。1.4测量单位以SI（公制）单位给出的值为标准。括号中给出的值仅供参考。

PrefaceThis is the first edition of CSA Z94.4.1, Performance of filtering respirators. This Standard is intended to support a national respirator certification program for Canada. CSA Group acknowledges that the development of this Standard was made possible, in part, by funding and support of the Standards Council of Canada. This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.Scope1.1 In scope This Standard specifies performance requirements for respirators that operate in the air filtering mode for filtering particulate matter.1.2 Out of scope This Standard does not address the following: a) respirators with filters for gas/vapour removal, which will be covered in a future edition; b) respirators that operate in the atmosphere-supplying mode, or requirements for the atmosphere-supplying mode of combined respirators; c) equipment that does not provide respiratory protection performance meeting at least Protection Level 1 as defined in CAN/CSA Z94.4-18, such as surgical masks or cloth masks; d) sampling and quality assurance requirements for respirator manufacturing; and e) procedures for the application for, and the administering and issuing of, certificates of respirator approval.1.3 Terminology In this Standard, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; "should" is used to express a recommendation or that which is advised but not required; and "may" is used to express an option or that which is permissible within the limits of the Standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application. 1.4 Units of measure The values given in SI (metric) units are the standard. The values given in parentheses are for information only.