Buried soft-seated gate valves are critical valves widely employed in pipeline systems, featuring unique designs and functionalities that render them extensively utilized across various industrial and domestic applications. Working principle The working principle of buried soft-seated gate valves is based on the sealing performance between the gate and the sealing surface. When the valve is in the closed position, the gate is pushed against the sealing surface by the actuating mechanism, typically a handwheel or electric actuator, achieving complete closure of the pipeline. When it is necessary to open the valve, the actuating mechanism pulls the gate away from the sealing surface, allowing the medium to flow freely in the pipeline. Structural characteristics 1. Subterranean Design: Buried soft-seated gate valves are typically installed underground within pipeline systems to shield the valves from external environmental impacts. Simultaneously, this design maximizes space conservation and ensures unobstructed pipeline flow. 2. Soft-Sealing Structure: Soft-sealing materials typically utilize rubber or polymers, offering excellent sealing performance and corrosion resistance. They can maintain a stable sealing effect across various media and temperatures. 3. High Pressure Endurance: The design structure of buried soft-seated gate valves is robust, capable of withstanding high pressure and impact forces, ensuring stable and reliable operation under various operating conditions. 4. Anti-corrosion Coating: Valves are typically coated with anti-corrosion coatings on their surfaces to enhance durability and lifespan, thereby reducing maintenance costs. 5. Complete Accessory Configuration: Buried soft-seated gate valves are typically equipped with accessories such as handwheels, electric actuators, limit switches, etc., to meet operational requirements under different conditions. Application area 1. Petroleum and Chemical Industry: Used for control and regulation of crude oil, natural gas, and chemical media. 2. Municipal Water Treatment Systems: Used for flow control and prevention of backflow in municipal water distribution networks. 3. Wastewater Treatment Plants: Used for drainage and regulation in wastewater treatment systems. 4. Thermal Power Plants: Used for flow control in boiler feedwater pipelines and cooling water systems. 5. Urban Heating Systems: Used for regulation and control of heat transfer media in centralized heating networks. Buried soft-seated gate valves play a crucial role as integral components in pipeline systems across industrial and civilian domains. Their reliable sealing performance, stable structural design, and extensive application areas make them indispensable in pipeline systems. This article aims to help readers gain a comprehensive understanding and application of buried soft-seated gate valves, thereby enhancing the safety and operational efficiency of pipeline systems.

The tilting disc check valve is a common type of valve used in pipeline systems to prevent reverse flow of the medium. It typically consists of components such as the valve body, disc, spring, and sealing gasket. The working principle of the tilting disc check valve is based on the design of the disc: the disc is positioned at an angle, allowing the medium to flow smoothly through the valve in the forward direction, while swiftly closing the valve in the event of reverse flow, thereby preventing backflow of the medium. One of the characteristics of the tilting disc check valve is its simple structure. Due to the fewer components and compact layout, manufacturing and maintenance are relatively easy. Additionally, the tilting disc check valve has the capability of quick closure. When there is a change in the flow direction of the medium, the disc promptly responds and closes the valve, effectively preventing backflow of the medium and maintaining the normal operation of the pipeline system. Another significant feature is its excellent sealing performance. The tilting disc check valve employs devices such as springs to assist in closing the disc, ensuring effective sealing of the valve in the closed position, thus preventing medium leakage and safeguarding the safe operation of the pipeline system. Furthermore, tilting disc check valves are typically manufactured using corrosion-resistant materials, enabling them to operate stably in corrosive media over the long term. Another notable feature of the tilting disc check valve is its wide range of applications. It is suitable for various media, including liquids, gases, and steam, and is widely used in industries such as water supply, drainage, chemical, and petroleum. Whether in low-pressure systems or high-pressure systems, tilting disc check valves can reliably prevent medium backflow, protecting the safety operation of pipelines and equipment. In summary, the tilting disc check valve plays a crucial role in pipeline systems due to its characteristics of simple structure, rapid closure, excellent sealing performance, corrosion resistance, and wide applicability. When designing and selecting valves, considering factors such as the working pressure of the pipeline system, characteristics of the medium, and operating environment, choosing the appropriate tilting disc check valve can effectively enhance the safety and stability of the pipeline system.

The installation requirements of fully welded ball valves in underground pipelines are crucial, as the unique characteristics of the underground environment pose higher demands on the performance and safety of the valves. Proper installation not only ensures the normal operation of the valves but also prolongs their service life and enhances the safety and reliability of the pipeline system. The following are the specific requirements for installing fully welded ball valves in underground pipelines: 1. Selecting the appropriate valve type When installing fully welded ball valves in underground pipelines, it is necessary to choose the appropriate valve type based on the operating conditions and fluid characteristics of the pipeline system. Fully welded ball valves, with advantages such as simple structure and reliable sealing, are suitable for high-pressure, high-temperature, and corrosive fluid applications in pipeline systems. 2. Underground burial depth consideration When installing fully welded ball valves, it is imperative to consider the depth of underground burial. Typically, the burial depth of underground pipelines should comply with relevant standards and specifications to ensure the valves are positioned securely while facilitating maintenance and operation. 3. Corrosion protection measures The dampness of the underground environment and the presence of chemicals in the soil can lead to corrosion and damage to valves. Therefore, when installing fully welded ball valves, it is necessary to implement appropriate corrosion protection measures. This includes selecting valves manufactured from corrosion-resistant materials and applying corrosion-resistant coatings to the valves to extend their service life. 4. Sealing performance requirements Fully welded ball valves in underground pipeline systems must possess excellent sealing performance to prevent fluid leakage and contamination of groundwater sources. During installation, it is imperative to ensure that the valve's sealing components are intact and properly installed to ensure that the sealing performance meets design requirements. 5. Consideration of groundwater level fluctuations Fluctuations in groundwater levels may affect the operational status and safety of fully welded ball valves. When selecting installation locations, it is essential to consider the range of groundwater level fluctuations and implement corresponding waterproofing measures to prevent groundwater from affecting the valves. 6. Regular inspection and maintenance The underground environment has a significant impact on fully welded ball valves; therefore, regular inspection and maintenance of the valves are essential. Inspection tasks include assessing the sealing performance of the valves, checking the condition of moving parts, evaluating the effectiveness of corrosion protection measures, and promptly addressing any issues to ensure the safe operation of the valves. When installing fully welded ball valves in unde...