阀瓣/阀球

阀瓣/阀球是止回阀中的关键密封部件，设计用于在阀体内自由移动，以实现单向流动。当流体正向流动时，压力将阀瓣/阀球从其阀座上抬起；当流体反向流动或停止时，重力或背压将其压回阀座，形成紧密密封以防止回流。该部件通过维持压力和防止管道污染来确保系统完整性。

阀瓣/阀球基于简单的机械原理工作：它响应流体压差。正向流动产生的压力使该部件离开阀座，允许流体通过。反向流动或没有正向压力时，阀瓣/阀球回到其就座位置，阻断流动路径。在旋启式止回阀中，铰接的阀瓣旋转；在球式止回阀中，球形阀球线性移动；两者都依赖流体动力学和重力进行操作。

The Disc/Ball operates on a simple mechanical principle: it responds to fluid pressure differentials. Forward flow creates pressure that displaces the component from its seat, allowing passage. Reverse flow or absence of forward pressure causes the disc/ball to return to its seated position, blocking the flow path. In swing check valves, a hinged disc pivots; in ball check valves, a spherical ball moves linearly; both rely on fluid dynamics and gravity for operation.