1.1 本规范规定了中央真空软管入口阀套的尺寸和公差要求和试验方法。 1.2 所有注释和脚注均应视为本规范的非强制性要求。 1.3 本规范不适用于进气阀支承（或安装）板。 1.4 本标准适用于标有ASTM的通用阀门 F2863 ，并且不限制专有阀门设计。 1.5 以英寸-磅为单位的数值应视为标准。括号中给出的值是国际单位制的数学转换，仅供参考，不被视为标准。 1.6 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 This specification establishes requirements and test methods for dimensions and tolerances of central-vacuum hose inlet valve sockets. 1.2 All notes and footnotes shall be considered as non-mandatory requirements of the specification. 1.3 This specification does not apply to inlet valve back-up (or mounting) plates. 1.4 This standard is applicable to universal valves marked with ASTM F2863 , and does not limit proprietary valve designs. 1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.