When a gate valve is closed, the sealing surfaces rely solely on the pressure of the medium to achieve a seal—specifically, the sealing surface of the gate is pressed against the valve seat on the opposite side by the medium’s pressure, thereby ensuring a tight seal. This type of sealing is known as self-sealing. By contrast, most gate valves employ forced sealing: when the valve is closed, an external force is used to press the gate against the valve seat, guaranteeing the sealing performance of the sealing surfaces. Such valves should be installed vertically in the pipeline.
当闸阀关闭时，密封面完全依靠介质的压力来实现密封——具体来说，闸阀的密封面被介质的压力压在对面的阀座上，从而确保紧密密封。这种密封被称为自密封。相比之下，大多数闸阀采用强制密封：当阀门关闭时，外力作用于闸阀上，保证密封面的密封性能。这种阀门应该垂直安装在管道中。
Performance 性能
1. The valve can be locally and remotely controlled according to user requirements, and can also provide remote and centralized display.
阀门可根据用户要求进行本地远程控制，也可提供远程集中显示。
2. Lightweight: The valve body is made of carbon steel, making it approximately 20%–30% lighter than conventional gate valves, which facilitates installation and maintenance.
重量轻：阀体采用碳钢材质，比常规闸阀轻约20%-30%，便于安装和维护。
3. Using this type of valve can enhance the sealing performance of pipeline systems, minimizing leaks to the greatest extent possible, thereby playing a positive role in improving production efficiency and protecting the environment.
使用该类型阀门可以增强管道系统的密封性能，最大限度地减少泄漏，从而对提高生产效率和保护环境起到积极作用。
4. The sealing surface is designed with a highly wear-resistant and corrosion-resistant ceramic composite material, using an inlaid technology. This results in superior corrosion resistance and excellent wear resistance, significantly extending the service life of China’s valves and increasing their cost-effectiveness by a factor of 10 compared to conventional valves.
密封面采用高耐磨、耐腐蚀陶瓷复合材料设计，采用镶嵌技术。这导致卓越的耐腐蚀性和优异的耐磨性，大大延长了中国阀门的使用寿命，与传统阀门相比，成本有效性提高了10倍。