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The butterfly valve is used to open and shut the medium circulation or regulate the medium flow in the pipeline.
1. Simple structure, small volume ,light weight and small size for installation. According to the connection type, there are three kinds of basic connection: wafer type, flange type and butt welding type.
2. The sealing structure has three kinds including multi -layer, metal sealed, wholly metal.
The movement direction of the gate valve is perpendicular to the flow direction. The gate valve can only be fully opened and closed, and can not be adjusted.
According to the sealing surface material, it can be divided into wedge gate valve and parallel gate valve, wedge gate valve can be divided into single gate plate, double gate plate and elastic gate type; parallel gate valve can be divided into single gate plate and double gate plate. According to the thread position of the valve stem, it can be divided into two types: Rising stem gate valve and Non rising stem gate valve.
The strainer is an indispensable device on the pipeline conveying medium. It is usually installed in the pressure reducing valve, pressure relief valve, constant water level valve, square filter and other equipment at the import end. The strainer is composed of body and stainless steel filter screen.
The globe valve, also known as shut-off valve, is one of the most widely used valves. The reason why it is widely popular is that the friction force between the sealing surfaces is small in the opening and closing process, relatively durable, small in opening height, easy to manufacture and easy to maintain. It is not only suitable for medium and low pressure, but also suitable for high pressure.
The check valve is one direction valve, it can prevent the flow in the opposite direction. The check valve works automatically. Under the action of fluid pressure flowing in one direction, the valve disc opens; when the fluid flows in the opposite direction, the valve disc is closed and the flow is cut off.
The ball valve is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline . It only needs to rotate 90 degrees and a small rotating torque to close tightly. It is most suitable for the open-shut valve and cut-off valve.
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