Structure and working principle of the expansion butterfly valve

　　Expansion Butterfly Valve It is a valve used for fluid control. Due to its unique structure and superior performance, it is widely used in the fields of petrochemicals, power, water treatment, metallurgy, and food.

　　1. Structural Features

　　The structure consists of a valve body, valve, sealing ring, and transmission mechanism. The valve is made of elastic material, and the sealing ring is made of high-strength, high-temperature resistant rubber and polymer materials. It uses a butterfly rotation method to control the flow rate.

　　2. Working Principle

　　When the valve is closed, the sealing ring forms a complete seal through the rotation of the butterfly valve, thus achieving the working conditions of the fluid, and preventing leakage of discharged gas and liquid. When the valve is opened, the sealing ring and valve control the flow rate as the valve opens and closes. Due to the special valve structure, it has characteristics such as low flow resistance and long life.

　　3. Application Fields of Expansion Butterfly Valves

　　Expansion butterfly valves are widely used in the fields of petrochemicals, power, water treatment, metallurgy, and food. They can control the flow of a wide range of gases and liquids in various industrial plants, and have high engineering adaptability and reliability in terms of temperature, pressure, and flow range.

　　4. Advantages of Expansion Butterfly Valves

　　Expansion butterfly valves have advantages such as simple valve structure, light weight, convenient operation, small fluid flow resistance, corrosion resistance, wear resistance, good sealing performance, long life, and wide application range.

　　5. Maintenance of Expansion Butterfly Valves

　　To ensure the normal use of expansion butterfly valves, regular maintenance is required, such as checking whether the valve connection threads are loose and whether the sealing ring is worn, to ensure the normal operation of the valve.

　　Expansion butterfly valves, also known as differential expansion butterfly valves, are valves that can automatically adjust the flow rate. They consist of two semicircular valve flaps with a high-elasticity rubber filling between them. When fluid passes through the valve, the rubber expands, thereby adjusting the flow rate.

　　The working principle of the expansion butterfly valve is: When the medium flows, the valve flap automatically opens. After the medium passes through the valve, the high-elasticity rubber surrounding the valve flap expands due to the increased medium force, thus achieving a sealing effect. When the medium stops flowing, the valve flap automatically closes, and the valve also closes.