In fluid control systems, valves, as key components for regulating and cutting off the flow of media, their performance and selection directly affect the operational efficiency and safety of the entire system. Among various types of valves, the worm gear flange soft-sealed butterfly valve has occupied an important position in many industrial fields due to its unique structural design and superior sealing performance.

I. Working Principle
The worm gear flange soft-sealed butterfly valve controls the on-off of the medium by rotating the valve plate. Its core components include the valve body, valve plate, worm gear transmission device and soft sealing material. When the worm gear is driven to rotate, the valve shaft connected to it drives the valve plate to rotate around the center of the shaft, thereby opening or closing the valve. Soft sealing materials (such as rubber, polytetrafluoroethylene, etc.) are installed on the edge of the valve plate or the valve seat to ensure a tight fit when the valve plate is closed, forming a reliable sealing effect. This design not only reduces the operating torque but also enhances the sealing performance and service life of the valve.

Ii. Structural Features
1. Flange connection: The worm gear flange soft-sealed butterfly valve uses a flange as the connection end, which facilitates a quick and firm connection with the pipeline system and is suitable for high-pressure, high-temperature or corrosive medium applications.

2. Worm gear transmission: The worm gear transmission mechanism has a self-locking function. Even without a power source, it can maintain the stability of the valve position and prevent the valve plate from accidentally opening or closing due to fluctuations in medium pressure. Meanwhile, worm gear transmission makes operation more convenient and is suitable for manual or electric remote control.

3. Soft seal design: The selection of soft seal materials ensures that the valve has excellent sealing performance when closed, effectively preventing medium leakage. It is suitable for applications with high sealing requirements.

4. Compact structure: The worm gear flange soft-sealed butterfly valve is small in size, light in weight, occupies less space, and is easy to install and maintain.

5. Flow regulation: By adjusting the opening Angle of the valve plate, precise flow regulation can be achieved to meet the flow control requirements under different working conditions.

Iii. Application Fields

Worm gear flange soft-sealed butterfly valves are widely used in industries such as petroleum, chemical engineering, water treatment, food, pharmaceuticals, and power due to their excellent performance. Especially in pipeline systems that require frequent opening and closing, where the medium contains particles or corrosive components, and where good sealing performance is required, its advantages are particularly obvious. For instance, on a chemical production line, it is used to control the flow of corrosive liquids; In water treatment systems, it is used to regulate and cut off the flow of clear water or sewage. Ensure the medium transmission under hygienic conditions on the food processing line.

In conclusion, the worm gear flange soft-sealed butterfly valve, with its unique design concept and outstanding performance, plays a significant role in the field of fluid control. By understanding its working principle, structural features, application fields and maintenance methods, one can better select and apply such valves to ensure the safe and efficient operation of the fluid system. With the continuous advancement of technology, the performance of worm gear flange soft-sealed butterfly valves will be further enhanced, providing more reliable and intelligent fluid control solutions for more industries.