BS EN ISO 13693-1:2017规定了小型塑料阀体阀门的一般要求和试验方法 用于化学灌溉，以下简称“本装置”，用于灌溉管道中的操作 可能含有农业所用类型和浓度的肥料和化学品的系统。它适用于可控安全装置（也称为防回流阀），具有减小的压力 压力区（RPZ），旨在通过反虹吸或灌溉背压防止回流 只要上游饮用水分配系统中的压力较低，水就会流入上游饮用水分配系统 而不是位于下游的系统。适用于公称尺寸小于等于DN 50（2“）且公称压力为DN 50（2“）的设备 PN10，能够在不经修改或调整的情况下，在高达1MPa（10bar）的任何压力下工作，在高达1MPa（10bar）的任何压力变化下工作，并在高达45°C的温度下和65°C的温度下持续工作1h。 交叉引用:ISO 7-1ISO 9635-1ISO 9644包含以下内容:勘误表，2017年3月

BS EN ISO 13693-1:2017 specifies the general requirements and test methods for small plastics-bodied valves used for chemigation, hereinafter referred to as "the device", intended for operation in irrigation pipe systems which may contain fertilizers and chemicals of the type and concentration used in agriculture.It is applicable to controllable safety devices (also known as backflow preventers) with a reduced pressure zone (RPZ), intended to prevent backflow by back-siphonage or backpressure of irrigation water into an upstream potable water distribution system, whenever the pressure in the latter is lower than that in the system located downstream.It is applicable to such devices of nominal size up to and including DN 50 (2"), with a nominal pressure of PN10, that are capable of working without modification or adjustmentat any pressure up to 1 MPa (10 bar),with any pressure variation up to 1 MPa (10 bar), andin permanent duty at temperatures up to 45 °C and for 1 h at 65 °C.Cross References:ISO 7-1ISO 9635-1ISO 9644Incorporates the following:Corrigendum, March 2017