一、结构及用途 Structure and purpose

该阀主要用于管路系统中，以防止管路系统超压或维持管路的压力，当泵关闭后还可以减少水锤冲击。也可用于大型供水系统的水锤消除装置，并且阀门控制系统的进口处装有一个自清洗滤网，利用流体特性，使比重较大、直径较大的悬浮颗粒不会进入控制系统，确保主阀的上游供水压力某一设定值上使系统循环畅通无阻，该阀起闭灵敏、安全可靠、动作平稳、使用寿命长。

Use in a pipeline system to prevent it from surpassing pressure or keep the pressure of it．to reduce the water hammer＇s shock after the pump is closed and also and also used as a water hammer remover for a large water supply system．On the inlet of the valve＇s control system a self cleaning filter screen is placed，which，by means of the bigger specific gravity of the fluid，stops the suspension grains of a bigger specific gravity and diameter going into the sys-tern to ensure the main valve＇s water supply pressure at the upstream at a set value to get the system smoothly circulated without any resistance．This valve features sensitive open-close，safety，reliability，stable motion and long duration.

四、主要外形及连接尺寸 Schematic diagram of installation

注：安装示意图中弹性座封闸阀或蝶阀任选，建议≥ DN350选蝶阀。

Note：Either elastic seat ring sealed gate valve or butterfly valve can be selected in the schematic diagram of installation.Recommended to select the butterfly valve in case of≥DN350