本文件规定了有关液化石油气燃料止回阀部件的一般信息，该部件拟用于ISO 3833中定义的机动车类型。它提供了一般设计原则，并规定了说明和标记的要求。它还规定了止回阀的测试要求。交叉引用:ISO 20766-2:2018ISO 20766-1ISO 9162ISO 3833购买时可用的所有当前修订均包含在本文件的购买中。

This document specifies general information regarding the non-return valve component of liquefied petroleum gas fuel, intended for use on the types of motor vehicles as defined in ISO 3833. It provides general design principles and specifies requirements for instructions and marking. It also specifies test requirements for the non-return valve.Cross References:ISO 20766-2:2018ISO 20766-1ISO 9162ISO 3833All current amendments available at time of purchase are included with the purchase of this document.