Products Details

Power station gate valve is a valve specially used in the power system, mainly used in the power station pipeline system to cut off or connect the pipeline medium. They are usually designed for high temperature and pressure conditions and have a unique self-sealing design, making the higher the pressure, the more reliable the seal. The design and manufacture of power station gate valves follow certain standards, such as GB/T12234, ASMEB16.34, JB/T3595, etc.

The characteristics of power station gate valve include low fluid resistance, easy operation, simple maintenance and wide application range. They have a pressure self-tightening seal and are usually welded at both ends of the body branch pipe. The sealing surface of the seat and disc is made of a wear-resistant, abrasion-resistant material such as cobalt-based cemented carbide plasma spray welding. The valve stem has been treated with anti-corrosive nitriding and has good corrosion resistance and abrasion resistance.

The opening and closing process of a power station gate valve involves the mechanical movement of the stem, which is designed at the bottom so that the valve rotates frictionless when opened and is completely sealed by mechanical wedging against the ball when closed.

The applicable medium of the power station gate valve includes non-corrosive media such as water and steam, and the operation mode can be manual, gear driven or electric. They are used in various system pipelines of thermal power plants, including four pipelines and extraction steam systems, high-pressure bypass inlet and high-pressure water supply pipelines, main steam systems, desulfurization and denitrification systems, etc.

In terms of technical specifications, the nominal diameter range of power station gate valves is usually 2"-24", nominal pressure from PN100 to PN420, CLASS600 to 2500. Materials may include WCB, LCB, WC6, WC9, CF8, CF8M, CF3, CF3M, etc., for temperatures ranging from -29 to 425 degrees Celsius.

The sealing surface material of power station gate valve is widely used in plastic, which has good sealing property, and even has been widely used in vacuum system. In addition, the single-seat design of the power station gate valve eliminates the risk of abnormal pressure boost in the valve cavity, and the low-torque design allows the valve to open and close easily.

Power station gate valves are cost-effective to maintain, especially in high temperature and pressure services, and they provide an absolutely reliable seal. In the power industry, power station gate valves are suitable for standard and critical applications such as the distribution of steam in power plants. By changing the body and cover flange connection to a welded connection, the leakage path is eliminated, weight is reduced, and the application of external insulation is simplified.

When selecting a power station gate valve, it is necessary to consider its structural characteristics and applicable working conditions to ensure the performance and reliability of the valve. For example, the national standard power station gate valve provided by Shanghai Ainai is designed and manufactured in line with JB/T3395 and other standards, which is suitable for pipelines in various working conditions such as petroleum, chemical, and thermal power stations. The FZB-D series power station gate valve provided by FLYGER Valve in the UK has a welded connection mode and is suitable for the operating temperature range of -29 ° C to 540 ° C.

In general, the power station gate valve is an indispensable component of the power system, and its design and material selection are to meet the needs of the special working conditions of the power station to ensure the safety and efficiency of the system.