用途 User

       调节与控制主阀的出口压力，主阀出口压力不因进口压力变化而改变，亦不因主阀出口流量的变化而改变其出口压力。可用于生活给水，消防系统及工业给水系统。

Regulating and controlling the outlet pressure of the main valve, the outlet pressure of the main valve shall not change due to the import pressure change, nor shall it change the export pressure due to the change of the main valve outlet flow. It can be used for water supply, fire protection system and industrial water supply system.

特点 Characteristic

       该阀采用全通道流线型设计，流体阻力小，流量大，即可减动压也可减静压。

The valve adopts full channel flow line design, the fluid resistance is small, the flow is big, can reduce dynamic pressure also can reduce static pressure.

原理 Principle

       介质进入阀体下腔，向上推动阀瓣，同时介质经主阀外控制管进入隔膜上腔，上腔的压力由导阀调节。上腔与阀体下腔的压力差决定了阀瓣的上下运动，从而改变出口压力。当上腔与下腔压力相同时，阀瓣停在某一位置，出口压力保持不变，起到稳压的作用。

The medium enters the lower chamber of the valve body and pushes the disc upward, while the medium is controlled by the outer control tube of the main valve into the diaphragm chamber. The upper chamber pressure is regulated by the guide valve. The pressure difference in the upper chamber and the lower chamber of the valve body determines the movement of the disc to change the outlet pressure. When the upper chamber is under pressure with the lower cavity, the disc stops at a certain position and the outlet pressure remains constant, acting as a stabilizing force.

执行标准 Executive standard

法兰尺寸 Flange dimensions：GB/T 17241.6

试验检验 Test test：GB/T 13927

安装图典型 Installation diagram