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Flange globe valve is a commonly used shut-off valve, mainly used to connect or cut off the medium in pipelines. Its characteristic is that the valve disc moves along the centerline of the valve seat, and the change in the valve seat opening is directly proportional to the stroke of the valve disc. Flange globe valves are suitable for small-diameter pipelines, with good sealing performance and minimal wear. They are usually used on pipelines or devices for high-temperature and high-pressure media, such as thermal power plants, nuclear power plants, and petrochemical systems
Structure and working principle
The structure of a flange globe valve includes a valve body, a valve cover, a valve disc, a valve stem, and a sealing element. The shape of the valve disc can be flat or conical, and the movement of the valve stem can be a stainless steel structure with a concealed or exposed stem. In the closed state, the pressure of the valve stem causes the sealing surface of the valve disc to tightly adhere to the sealing surface of the valve seat, thereby blocking the flow of the medium. The design of the flange globe valve ensures that there is no relative sliding between the valve disc and the sealing surface of the valve body during the opening and closing process, resulting in less wear and abrasion.
Application area
Flange globe valves are widely used in industries such as petrochemicals, chemicals, electricity, metallurgy, pharmaceuticals, and food. They are suitable for transporting various media such as water, oil, steam, nitric acid, acetic acid, oxidizing media, urea, etc. Especially in the production of small and large fertilizers in the synthetic industry, as well as in the desilication workshop of alumina Bayer process production and other pipelines that are prone to coking, flange globe valves are preferred due to their good sealing performance
Difference from other valve
Compared with other valves such as ball valve and gate valve, the main difference of flange globe valves lies in their sealing mechanism and structural design. Ball valves achieve sealing by rotating the ball, while gate valves close or open pipelines by lifting or lowering the valve plate. In contrast, the sealing of flange globe valves relies on the linear motion of the valve stem and the compression of the sealing ring, making them suitable for situations that require strict sealing.
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