A flanged plug valve is a widely used valve equipment in the industrial field, primarily designed to control the flow of fluids, such as liquids or gases.

I. Definition and Working Principle

A flanged plug valve controls fluid flow by rotating a valve plug (or stopper). The valve plug is typically cylindrical and rotates around the centerline of the valve body. When the plug is rotated to a position perpendicular to the pipeline axis, the valve is closed, preventing fluid passage. Conversely, when the plug aligns parallel to the pipeline axis, the valve is open, allowing fluid to flow smoothly. Additionally, the plug valve can adjust the rotation angle of the plug as needed to achieve precise control over fluid flow rates.

II. Structural Characteristics

1. Flanged Connection: The flanged plug valve connects to the piping system via flanges, offering excellent versatility and sealing performance. Different standard flanges and materials can be selected based on requirements.

2. Rotating Plug: The plug serves as the key component, controlling the opening and closing of the valve channel through rotation, thereby regulating fluid flow.

3. Sealing Structure: The sealing surface between the gate plate and valve body typically employs metal gaskets or packing to ensure the valve's sealing performance.

III. Application Areas

Due to its simple structure, ease of operation, and excellent sealing properties, the flanged plug valve finds widespread use in various industries:

1. Petrochemical Industry: Used for transporting, regulating, and controlling various corrosive media in oil refining, chemicals, and related sectors.

2. Power Industry: Controls the flow of cooling water, steam, and other media to ensure the smooth operation of power equipment.

3. Food and Beverage Industry: Favored for its smooth channel and absence of dead zones, making it easy to clean and drain impurities, thus widely used in food, beverage, and pharmaceutical industries.

4. Other Industries: Also plays a vital role in sectors such as wastewater treatment and automobile manufacturing.

IV. Precautions

• Regularly maintain and clean the valve to prevent impurities or sediment from accumulating within the valve channel, ensuring its proper function.
• Select appropriate valve materials and sealing structures based on the media's properties and the valve sealing surface's erosion resistance.
• Ensure correct valve installation orientation during installation and use to prevent leaks or damage caused by improper installation.