flap valve

基本解释

This valve is normally automatic work, in a direction of flow of fluid under pressure, open the flap valve;
通常这种阀门是自动工作的，在一个方向流动的流体压力作用下，阀瓣打开；
The erection of counterweight is the main technical measure for reducing the flap valve resistance and energy consumption.
安装平衡锤是减少拍门阻力和能源消耗的主要技术措施。
Meanwhile, the flap valve can be used to adjust weight, spring tension and the bottom outlet valve flap valve opening size to determine the pressure and open and close time.
同时，可以利用调整阀瓣的自重、弹簧的弹力以及阀瓣的底孔大小来确定阀门的开启压力和启闭时间。

These valves use a screw type valve instead of a simple flap, and they have a pressure regulating mechanism that will vent water to the ground if the intake pressure exceeds a set level.
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拍门
For large vertical axial flow pumping station, the area of flap valve can be 15%~20% of area of rapid-drop gate.
对大型立式轴流泵站,一般分流拍门面积可取快速闸门面积的15%~20%。
电子、通信与自动控制技术
辨阀