The ventilation butterfly valve is designed with a centerline or eccentric structure to achieve low pressure drop and high flow capacity. The multi-level sealing system can withstand temperatures up to 300℃ and effectively prevent dust. The valve stem and butterfly plate are forged integrally, providing high strength and long service life. It offers various driving options such as manual, electric or pneumatic, meeting the control requirements for different working conditions. The structure is compact, maintenance is simple, and it is suitable for regulating and cutting the airflow in various ventilation ducts.
Main material: Carbon Steel, Stainless Steel, Alloy Steel, Etc
Size range: DN100～DN6000,NPS4～NPS240
Pressure level: ≤PN6
Temperature range: ≤600℃
Operator: Manual, Pneumatic, Electric, etc..
Application scenarios: Used as a pipeline control device for regulating flow or cutting off gas media in dusty cold or hot air gas pipelines for ventilation and environmental protection projects in industries such as chemical, building materials, power stations, and glass.
◎ Design Standard: API 609,ASME B16.34,JB/T8692
◎ Pressure Temperature Rate: ASMEN B16.34,GB/T12224
◎ Face to Face: ASME B16.10,GB/T12221
◎ Flange Standard: ASME B16.5,ASME B16.47,GB/T9124
◎ Butt Weld Standard: ASME B16.25,GB/T12224
◎ Pressure Test: API 598 GB/T13927
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.
The Side Entry Cryogenic Floating Ball Valve is specially designed for deep cryogenic media (such as LNG, liquid nitrogen, liquid oxygen, etc.) applications. It adopts a unique side-mounted structure to ensure stable operation in extreme low-temperature environments below -196°C~+150°C. The valve body is made of high-quality stainless steel or special alloy materials, combined with precise processing techniques, achieving zero leakage and long service life under ultra-low temperature conditions. It is widely used in liquefied natural gas, air separation equipment, chemical and energy fields, and is a reliable choice for fluid control in harsh conditions.
The Axial Flow Check Valve has a unique axial flow design, and its spool is aligned with the flow direction, significantly reducing the resistance loss when the fluid passes through. The spool is driven by spring or fluid pressure for quick opening and closing. When the fluid is flowing forward, the spool is pushed open and the fluid passes smoothly. When the fluid flows in reverse, the spool is quickly closed, effectively preventing backflow, and ensuring the stability and safety of the system operation.