放风阀广泛应用于建材、冶金、石化、电力等行业的高炉系统的冷风和空气管道。该阀可在不停止鼓风机工作的情况下减少或停止向高炉送气，将多余的气体从管道中排入大气。

The valve is widely used at cold air pipe of blast furnace system in building material, metallurgy, oil, electric power industries etc. It can reduce or stop transmitting air to furnace without stopping fan and emit the otiose gas to the atmosphere through the pipe..

结构特点：

Structure characteristic:

放风阀由阀体、蝶板、连杆、排风筒等零件组成。手动放风阀由杠杆机构转动蝶板实现阀门启闭，自动放风阀由自动装置驱动蝶板，可实现远距离控制阀门的启闭，完成气体的排放。

The valve is made up of body, disc, pole and discharging air cylinder etc. Manual valve realizes the open-close of gate by making the lever turning the butterfly disc. Electric valve realizes long- range control of open-close of gate to emit gas by making the electric device driving the butterfly disc.

性能参数；

Performance parameter:

PF S Z-Ⅱ外形连接尺寸：

Appearance joint dimensions: