闸阀是工业管道系统中应用为广泛的截断阀之一，其启闭件为闸板，闸板的运动方向与流体方向相垂直。通俗地说，闸阀的工作原理就像一扇上下移动的闸门——转动手轮，通过阀杆的螺纹传动，带动闸板沿阀座轴线垂直方向升降，实现管道的接通或切断。

Gate valve is one of the widely used shut-off valves in industrial pipeline systems. Its opening and closing component is a gate valve, and the movement direction of the gate valve is perpendicular to the fluid direction. Simply put, the working principle of a gate valve is like a gate that moves up and down - by rotating the handwheel and driving the valve stem through the thread transmission, the gate plate is lifted and lowered vertically along the axis of the valve seat, achieving the connection or disconnection of the pipeline.

闸阀突出的优点是流道通畅、流体阻力出彩小。当闸阀处于全开状态时，闸板完全脱离流道，整个流通路径为直通式，介质运行的压力损失在所有阀门中是小的。这一特性使闸阀非常适用于对压力损失有严格要求的长输管道系统。此外，闸阀的启闭扭矩相对较小，操作较为省力。

The prominent advantages of gate valves are smooth flow channels and minimal fluid resistance. When the gate valve is fully open, the gate completely disengages from the flow channel, and the entire flow path is straight through. The pressure loss of the medium during operation is small among all valves. This feature makes gate valves particularly suitable for long-distance pipeline systems with strict requirements for pressure loss. In addition, the opening and closing torque of gate valves is relatively small, making the operation more effortless.

闸阀的分类方式有多种。按闸板结构形式，主要分为楔式闸阀和平行式闸阀两大类。楔式闸阀的闸板与阀座密封面形成一定角度（通常为5°，介质温度不高时为2°52'），关闭时依靠楔形结构的强制挤压实现密封；平行式闸阀的闸板密封面与阀座平行，靠介质压力或弹簧力实现密封。按阀杆螺纹的位置，闸阀又可分为明杆闸阀（阀杆随闸板升降而升降，螺纹外露可见）和暗杆闸阀（阀杆只旋转不升降，螺纹在阀体内部）。明杆闸阀便于观察阀门开闭状态，暗杆闸阀则节省安装空间。

There are various ways to classify gate valves. According to the structure of the gate, it is mainly divided into two categories: wedge gate valves and parallel gate valves. The sealing surface between the gate plate and the valve seat of the wedge gate valve forms a certain angle (usually 5 °, and 2 ° 52 'when the medium temperature is not high), and when closed, it relies on the forced compression of the wedge structure to achieve sealing; The sealing surface of the gate plate of a parallel gate valve is parallel to the valve seat, and sealing is achieved by medium pressure or spring force. According to the position of the valve stem thread, gate valves can be divided into rising stem gate valves (the valve stem rises and falls with the gate, and the thread is visible) and hidden stem gate valves (the valve stem only rotates and does not rise or fall, and the thread is inside the valve body). Bright stem gate valves facilitate observation of valve opening and closing status, while concealed stem gate valves save installation space.

闸阀的局限性同样不容忽视。闸阀只能作全开或全关使用，不能用于流量调节——若长时间处于半开状态，高速流动的介质会对闸板密封面造成严重的冲蚀磨损。此外，闸阀的启闭时间较长，体形和重量也相对较大。密封面在启闭过程中存在相对滑动，容易产生擦伤，这是闸阀主要的失效模式之一。

The limitations of gate valves cannot be ignored. Gate valves can only be used for fully open or fully closed operation and cannot be used for flow regulation - if they are in a semi open state for a long time, the high-speed flowing medium will cause serious erosion and wear to the sealing surface of the gate. In addition, the opening and closing time of gate valves is relatively long, and their size and weight are also relatively large. The sealing surface experiences relative sliding during the opening and closing process, which can easily cause scratches and is one of the main failure modes of gate valves.

良工阀门生产的闸阀产品涵盖多种型号与材质。Z41H系列楔式闸阀采用法兰连接、碳钢材质，适用于水、蒸汽、油品等介质。Z941H电动闸阀适用于公称压力PN1.6～16.0MPa、工作温度-29℃～550℃的石油、化工、电力等系统。Z44T/W平行式双闸板闸阀适用于公称压力≤1.0MPa的蒸汽、水、油类等介质。此外，还有Z43WF无导流孔平板闸阀（公称压力6.4MPa，密封面为氟塑料）等特种产品。在材质方面，良工阀门可提供碳钢、合金钢、不锈钢、铸铁等多种选择。

The gate valve products produced by Lianggong Valve cover a variety of models and materials. The Z41H series wedge gate valve adopts flange connection and carbon steel material, suitable for media such as water, steam, and oil. Z941H electric gate valve is suitable for petroleum, chemical, power and other systems with nominal pressure PN1.6~16.0MPa and working temperature -29 ℃~550 ℃. Z44T/W parallel double gate valve is suitable for steam, water, oil and other media with nominal pressure ≤ 1.0MPa. In addition, there are special products such as Z43WF flat gate valve without diversion hole (nominal pressure 6.4MPa, sealing surface made of fluoroplastic). In terms of materials, Lianggong Valve offers a variety of options including carbon steel, alloy steel, stainless steel, cast iron, and more.

闸阀广泛应用于石油、化工、冶金、电力、水利等行业的各类管道系统中，尤其适用于中、大口径管道的截断控制。良工阀门作为国内老牌阀门制造企业（创建于1946年），其闸阀产品已服务于核电、军工、电力电站、石油化工等多个国家核心领域。

Gate valves are widely used in various pipeline systems in industries such as petroleum, chemical, metallurgical, power, and water conservancy, especially for cutting control of medium and large diameter pipelines. As a well-established valve manufacturing enterprise in China (founded in 1946), Lianggong Valve's gate valve products have served multiple national key fields such as nuclear power, military, power plants, and petrochemicals.

本文由良工阀门代理友情奉献.更多有关的知识请点击:http://www.jnlgvf.com真诚的态度.为您提供为多维度的服务.更多有关的知识我们将会陆续向大家奉献.敬请期待.

This article is a friendly contribution from Lianggong Valve Agency For more information, please click: http://www.jnlgvf.com Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.