Introduction to the Sealing Principle of楔式Gate Valves

The Sealing Principle of楔式Gate Valves:

The sealing principle of the wedge gate valve relies on the tight fit between the two sealing surfaces on the wedge gate plate and the two sealing surfaces on the valve body when they are inserted. The purpose of using a wedge gate plate is to enhance the auxiliary sealing load.,To enable the metal hard-seated wedge gate valve to withstand high medium pressure,The valve can also achieve sealing at low medium pressure. When closing, rotate the valve stem clockwise to make the sealing surfaces of the gate valve and the valve body fit tightly for sealing. However, the sealing force at the inlet end of a metal-sealed wedge gate valve, which is produced by the wedging action, is often insufficient to achieve adequate inlet end sealing due to the force exerted by the medium..Therefore, the metal wedge gate valve is a single-sided forced seal.

Among various types of valves, gate valves are one of the most widely used. They are generally only suitable for full open or full close positions and cannot be used for regulation or throttling. The application range of wedge gate valves: Widely used in the oil and petrochemical industry, thermal power plants, and other pipeline systems for oil and steam, as opening or closing devices for medium in pipeline connections. Wedge gate valves are typically used where there are no strict requirements for the external dimensions of the valve.,And in scenarios with stringent operating conditions, such as high-temperature and high-pressure working mediums, where the closure must ensure long-term sealing. Generally, when reliability in sealing performance, high pressure, high-pressure cutoff (large pressure difference), low-pressure cutoff (small pressure difference), low noise, cavitation, and vaporization, high-temperature media, and low temperatures (cryogenic conditions) are required, it is recommended to use wedge gate valves. These are widely applied in industries such as power, oil refining, petrochemicals, offshore oil, urban water supply and wastewater treatment projects, and in the chemical sector.