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The electric power station gate valve by Gangye, also known as a special valve for power stations, is mainly suitable for various systems in thermal power plant pipelines to cut off or connect pipeline media. It is suitable for media such as water and steam, which are non-corrosive. Compared with other valve products, power station valves are characterized by high temperature and high pressure, a unique self-sealing design, and the higher the pressure, the more reliable the sealing. Due to its technical performance characteristics and special operating conditions, the product has formed distinctive features that other products cannot replace.
The fluid resistance is small, and its resistance coefficient is equal to that of a pipe segment of the same length.
The structure is simple, small in size, and light in weight.
It is tight and reliable, the sealing surface material of the gate valve is widely used plastic, with good sealing performance, and it has also been widely used in vacuum systems.
Easy to operate, quick to open and close, it only needs a 90-degree rotation from fully open to fully closed, making it convenient for remote control.
Easy to maintain, the gate valve structure is simple, and the sealing ring is generally active, making disassembly and replacement more convenient.
When fully opened or fully closed, the ball and seat sealing surface is isolated from the medium, so it will not cause erosion of the valve sealing surface when the medium passes through.
Wide range of applications, the diameter can range from a few millimeters to several meters, and it can be used from high vacuum to high pressure situations.
The power station gate valve mainly consists of a gate, sealing device, limiting device, operating mechanism, bracket, etc. Its structural characteristics include:
Integral casting type: The integral casting type valve generally uses a steel plate welded shell and inner parts combination, having the advantages of being lightweight and strong corrosion resistance.
Sealing device: The sealing device is the key component to ensure the gate's sealing performance, usually made of rubber, metal, or polytetrafluoroethylene, having high sealing performance.
Limiting device: The limiting device is used to control and protect the position of the gate, reducing the risk of damage caused by overspeed movement.
The working principle of the power station gate valve is relatively simple, mainly through the lifting of the valve stem to achieve the opening and closing of the gate. The specific process is as follows:
Closing process: Rotate the handwheel or valve stem nut clockwise, the valve stem drives the gate to descend, making the sealing surface tightly fit with the valve seat, thus cutting off the channel to achieve closure.
Opening process: Rotate the handwheel or valve stem nut counterclockwise, the valve stem drives the gate to ascend, making the sealing surface separate from the valve seat, thus opening the channel to achieve opening.
This is the first one.
