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Gate valve is a gate with opening and closing parts. The movement direction of the gate is perpendicular to the flow direction. The gate valve can only be fully opened and fully closed, and can not be adjusted and throttled. The gate valve is sealed by the contact between the valve seat and the gate. Usually, the sealing surface is overlaid with metal materials to increase the wear resistance, such as surfacing 1Cr13, stl6, stainless steel, etc. The gate has rigid gate and elastic gate. According to the different gate, gate valve is divided into rigid gate valve and elastic gate valve.
The stem of bellows sealed gate valve adopts a double sealing structure of bellows and packing to ensure a leak-free seal at the valve stem.It is used in power stations, natural gas, ammonia, vacuum, refrigeration systems, hot oil, and hot water systems. It is especially suitable for flammable, Pipelines for explosive, toxic and precious media.VIEW MORE >>
Pressure seal bonnet gate valve is sealed by media pressure, and the pressure is more large, the sealing is more reliable. On valve bonnet, there is a smooth cone which has self tight seal ring. This type valve is applied to chemical fuel electric power station. It is more simple than bolt bonnet type gate valve.VIEW MORE >>
As an opening and closing device, wedge gate valve is widely used in the pipelines of petrochemical, thermal power plants and other oil products, water vapor. Generally, wedge gate valve is used in the condition where has no strict size required, but the working condition is more harsh, such as high temperature and high pressure, or the long-term sealing condition.VIEW MORE >>