标准摘要
[中文适用范围]： 本文件规定了用于燃气燃烧器和燃气器具的阀门验证系统 (VPS) 的安全、结构和性能要求。 它还描述了检查是否符合这些要求的测试程序，并为购买者和用户提供必要的信息。 本文件适用于所有类型的 VPS，这些 VPS 用于自动检测燃气燃烧器部分的泄漏，该燃气燃烧器部分具有至少两个按照 ISO 23551-1 设计的阀门，并且如果其中一个阀门的泄漏超过检测限。 本文件适用于使用燃气的系统中最大工作压力不超过 500 kPa 的 VPS。 本文件不适用于爆炸性环境中使用的 VPS。 注：生产控制规定不属于 ISO 23551 系列。 [外文原描述]： ISO 23551-4:2018 specifies safety, constructional and performance requirements of valve-proving systems (VPS), intended for use with gas burners and gas-burning appliances. It also describes the test procedures for checking compliance with these requirements and provides information necessary for the purchaser and user. ISO 23551-4:2018 is applicable to all types of VPS which are used for the automatic detection of leakage in a gas burner section having at least two valves designed in accordance with ISO 23551‑1 and which give a signal if the leakage of one of the valves exceeds the detection limit. ISO 23551-4:2018 is applicable to VPS with a maximum working pressure up to and including 500 kPa for use in systems using fuel gases. ISO 23551-4:2018 is not applicable to VPSs for use in explosive atmospheres. NOTE Provisions for production control are not part of the ISO 23551 series.
英文名称Safety and control devices for gas burners and gas-burning appliances — Particular requirements — Part 4: Valve-proving systems for automatic shut-off valves