The valve is a control component in the fluid delivery system and has functions such as cut-off, regulation, diversion, prevention of backflow, regulation, shunting or overflow relief. Valves for fluid control systems range from the simplest shut-off valves to the extremely complex self-control systems available in a wide variety of sizes and sizes.
Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metals, and radioactive media. The connection between the valve and the pipe is an important parameter. According to this classification:
1. Threaded connection: The valve body has internal or external thread and is threadedly connected to the pipe.
2. Flange connection: The valve body is flanged and connected to the pipe flange.
3. Welding connection: The valve body has a welding groove and is welded to the pipe.
4. Clamp connection: The valve body has a clamping mouth and is connected with the pipe clamp.
5. Card sleeve connection: Connect with the pipe with a ferrule.
6. Clip connection: The connection form in which the valve and the two pipes are directly clamped together by bolts.
Valve body material:
1. Metal material: Parts such as valve body are made of metal material. Such as cast iron, carbon steel, alloy steel, copper alloy, aluminum alloy, lead alloy, titanium alloy, Monel alloy.
2. Non-metallic materials: parts such as valve bodies are made of non-metallic materials. Such as plastic, ceramics, enamel, glass steel and so on.
3, metal lining: the shape of the valve body is metal, the main surface of the internal contact with the medium is lining, such as rubber, lining plastic, lining ceramics.
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