High pressure electric gate valve

高压电动闸阀is a key equipment that uses an electric device to drive the gate to achieve rapid opening and closing of pipelines, designed specifically for harsh industrial environments such as high temperature and high pressure. Its main characteristics and working principle are as follows:

‌核心结构与工作原理‌Core structure and working principle
Composed of a valve body, valve stem, gate plate, and valve seat, the valve stem is driven by an electric actuator to vertically lift and lower the gate plate. When the gate is completely detached from the valve seat, the fluid is unobstructed (fully open), and when the cover is tightly pressed, the medium is completely blocked (fully closed). Its movement direction is perpendicular to the fluid flow direction, with low fluid resistance and spacious flow channels, making it suitable for high flow pipelines.
Detailed explanation of gate valve structure and working principle
High pressure and high temperature resistance: The valve body is made of forged/cast high-strength alloy steel (such as F22), and the sealing surfaces of the valve seat and gate are welded with hard alloy (hardness HRC55). The pressure bearing capacity is ensured through high-pressure water/gas strength testing and non-destructive testing.
Double sealing guarantee:
The valve plate sealing ring (PTFE graphite or metal ring) is tightly matched with the valve seat to achieve zero leakage;
Valve stem packing (graphite or PTFE material) prevents the medium from leaking out along the valve stem.
Intelligent electric drive: equipped with electric actuators, supporting remote operation of on-site knobs, remote controllers, and central control systems, achieving precise control of opening and closing and status monitoring.
Application scenarios and selection criteria
Typical applications of high-pressure electric gate valves:
Petrochemical industry: hydrocracking unit, ethylene cracking furnace steam pipeline;
Power industry: main steam pipelines for supercritical thermal power units (temperature resistant to 620 ℃), coolant pipelines for nuclear power plants;
Other: Metallurgical, cement, natural gas booster stations, and offshore platform water injection systems.
Selection key: It is necessary to match the pressure temperature level (such as PN160~PN450), choose sulfur resistant materials for sulfur-containing media, design hydrogen embrittlement prevention for hydrogen environments, and comply with API 6D, CE/PED certification, etc.
Maintenance and advantages
Maintenance focus: Regular acoustic emission testing of sealing surfaces; Internal leakage is caused by impurities on the sealing surface or spring failure, and needs to be cleaned and replaced; The valve stem is stuck and the packing cover can be adjusted.
Core advantages: wedge-shaped sealing structure, wear-resistant and corrosion-resistant; Bidirectional pressure bearing design is suitable for complex working conditions; Graphite sealing in fire protection design can maintain short-term sealing during a fire.
‌核心优势‌：楔形密封结构耐磨耐蚀‌；双向承压设计适应复杂工况‌；防火设计中石墨密封可在火灾时维持短期密封‌。