闸板/阀瓣

闸板/阀瓣是闸阀及类似调节阀中的关键部件，由平板或楔形板组成，在两个平行阀座之间滑动。它垂直于流体流动方向移动，要么完全打开以允许无限制流动，要么完全关闭以形成紧密密封。该部件设计用于开关服务而非节流，开启时压降最小，关闭时提供可靠的切断。其精密加工和材料选择确保与工业应用中各种流体、压力和温度的兼容性。

闸板/阀瓣基于线性运动原理，垂直于流动路径移动。当阀杆旋转时，通过螺纹将旋转运动转化为线性运动，从而提升或降低闸板/阀瓣。在开启位置，闸板/阀瓣完全缩回阀盖内，形成无阻碍的流动路径。在关闭位置，它紧贴两个平行密封面，形成金属对金属或软密封，阻止流体通过。楔形设计在系统压力增加时提供自紧式密封。

The Gate/Disc operates on a linear motion principle where it moves perpendicular to the flow path. When the valve stem rotates, it converts rotational motion into linear motion through threads, raising or lowering the gate/disc. In the open position, the gate/disc retracts completely into the valve bonnet, creating an unobstructed flow path. In the closed position, it seats firmly against two parallel sealing surfaces, creating a metal-to-metal or soft-seated seal that prevents fluid passage. The wedge-shaped design provides self-energizing sealing as system pressure increases.