Butterfly Valves

Triple Eccentric Butterfly Valve

The working principle of the three eccentric butterfly valve is based on its unique structural design, which achieves sealing and flow control functions through three eccentric distances: ‌Structural Design: ‌Three Eccentric Structure‌: The valve stem axis deviates from the center of the butterfly plate and the body center, and the rotation axis of the valve seat is at an angle to the axis of the valve body channel. This design enables the butterfly plate to form a wedge-shaped space with the valve seat when closed, achieving sealing through friction.‌ ‌Conical Sealing Surface‌: The periphery of the butterfly plate is machined into an external inclined conical surface, and the valve seat is an internal inclined conical surface, forming an elliptical contact surface. When closed, the butterfly plate achieves sealing through the asymmetric pressing force in the up and down directions, and the sealing becomes tighter as the pressure increases.‌ Working Mechanism: ‌Open State‌: The butterfly plate is separated from the valve seat, and the fluid passes through the channel; due to the eccentric design, during the opening process, the butterfly plate gradually detaches from the valve seat, reducing friction and operating torque.‌ ‌Closed State‌: The butterfly plate rotates 90° to contact the valve seat, forming a wedge-shaped space and achieving sealing through torque. ‌Flow Regulation‌: During the opening rotation of the butterfly plate, the valve's flow area gradually increases, reducing fluid resistance and improving the flow coefficient, achieving flow regulation. ‌Technical Advantages‌: Sealing Performance‌: The metal-to-metal hard sealing method can still maintain good sealing performance in high-temperature and high-pressure environments;‌ ‌Low Friction Operation‌: The eccentric design significantly reduces the operating torque and extends the valve's lifespan;‌ ‌Self-Locking Function‌: When closed, the butterfly plate becomes tighter under pressure, preventing the phenomenon of over-positioning.‌ This valve is widely used in the petroleum, chemical, and power industries, and common structural connection forms include double flange type, welding type, lug type, and socket type, etc.…
PRODUCT INQUIRY
Product Description
The working principle of the three eccentric butterfly valve is based on its unique structural design, which achieves sealing and flow control functions through three eccentric distances: ‌Structural Design: ‌Three Eccentric Structure‌: The valve stem axis deviates from the center of the butterfly plate and the body center, and the rotation axis of the valve seat is at an angle to the axis of the valve body channel. This design enables the butterfly plate to form a wedge-shaped space with the valve seat when closed, achieving sealing through friction.‌ ‌Conical Sealing Surface‌: The periphery of the butterfly plate is machined into an external inclined conical surface, and the valve seat is an internal inclined conical surface, forming an elliptical contact surface. When closed, the butterfly plate achieves sealing through the asymmetric pressing force in the up and down directions, and the sealing becomes tighter as the pressure increases.‌ Working Mechanism: ‌Open State‌: The butterfly plate is separated from the valve seat, and the fluid passes through the channel; due to the eccentric design, during the opening process, the butterfly plate gradually detaches from the valve seat, reducing friction and operating torque.‌ ‌Closed State‌: The butterfly plate rotates 90° to contact the valve seat, forming a wedge-shaped space and achieving sealing through torque. ‌Flow Regulation‌: During the opening rotation of the butterfly plate, the valve's flow area gradually increases, reducing fluid resistance and improving the flow coefficient, achieving flow regulation. ‌Technical Advantages‌: Sealing Performance‌: The metal-to-metal hard sealing method can still maintain good sealing performance in high-temperature and high-pressure environments;‌ ‌Low Friction Operation‌: The eccentric design significantly reduces the operating torque and extends the valve's lifespan;‌ ‌Self-Locking Function‌: When closed, the butterfly plate becomes tighter under pressure, preventing the phenomenon of over-positioning.‌ This valve is widely used in the petroleum, chemical, and power industries, and common structural connection forms include double flange type, welding type, lug type, and socket type, etc.
Features & Benefits

 Unique, compact, and lightweight design with flexible and labor-saving operation;

 Provides reliable sealing that meets various standards;

 Offers good flow characteristics and has a regulating function;

 Utilizes an eccentric design to minimize wear on the sealing surface, extending the valve's lifespan;

 Suitable for a wide range of applications, including water, steam, oil, and gas;

 Applicable across various conditions including different temperatures, pressures, and corrosive environments;

 Features a triple eccentric hard-sealed butterfly valve with an integral body and seat, the seat's sealing surface is coated with temperature and corrosion-resistant materials;

 Three eccentricities position the shaft and sealing surfaces to optimize sealing and reduce wear;

 Equipped with multi-layer sealing rings on the valve plate, enhancing sealing performance and operational ease, suitable for both high and low temperatures, ensuring zero leakage.


General Information

Material: Carbon Steel, Stainless Steel, Alloy Steel 

Nominal Size: NPS 2"~64", DN 50~1600

Pressure Rate: Class 150~1500, PN 10~250

Temperature Range: -46°C~538°C

Operator: Manual, Pneumatic, Electric, etc...

Application range: Suitable for water supply and drainage and gas pipelines in food, medicine, chemical industry, petroleum, electric power, light textile, paper making, etc. to adjust the flow and intercept the medium.


Technical Specification

◎ Design Standard: ASME B16.34、API 609、EN 593、

◎ Pressure Temperature Rate: ASME B16.34、EN12516-1、

◎ Face to Face: API 609、ISO 5752、EN558

◎ Flange Standard: ASME B16.5、ASME B16.47、EN 1092、GOST 33259、GB/T 9124

◎ Butt Weld: ASME B16.25、EN 12627 

◎ Pressure Test: API 598、ISO 5208、EN 12266-1、GOST 9544


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