双法兰蝶阀double flanged butterfly valve

该阀门适用于化工，石油，机械等行业。

The valve is suitable for chemical, petroleum, machinery and other industries.

特点（characteristic）：

结构简单，维修方便，阻力小，操作简单，密封性能好，耐腐蚀，耐高温，使用寿命长，易安装，安装时不受介质的流向限制。

Simple structure, convenient maintenance, small resistance, simple operation, good sealing performance, corrosion resistance, high temperature resistant, long service life, easy installation, installation is not affected by medium flow restrictions.

法兰能适用GB,DIN,JIS多个标准的管道连接，适用的介质有水，蒸汽，粉体。

More than flange can apply to GB, DIN, JIS standard pipe connection, the applicable medium is water, steam, powder.

工作原理和结构说明（The working principle and structure）：

本阀门主要由阀体，阀板，阀座，阀杆等零件组成。

This valve is mainly composed of body, disc, valve seat, valve stem and other parts.

本阀门依靠气动执行器，转动阀杆，使阀杆带动阀板在介质里作旋转动作，达到调节流速的目的。

This depend on the pneumatic valve actuator, turn the valve stem, the stem drive disc spins in the medium, to achieve the purpose of adjusting flow rate.