The Lifting Plug Valve reduces the operating torque through hydraulic balancing technology and is equipped with hardened metal sealing surfaces, capable of withstanding temperatures up to 425℃. The unique lifting mechanism effectively prevents wear on the sealing surface during the opening and closing process. It features a fire safety design and complies with API 607 standards. The integral forged valve body structure allows for a pressure rating up to Class 2500. It is suitable for high-performance applications such as catalyst transportation and coal chemical industries involving solid particle media.
Main material: Carbon Steel, Stainless Steel, Alloy Steel, Etc
Size range: DN25～DN900,NPS1～NPS36
Pressure level: PN10～PN420,CLass150～CLass2500
Temperature range: -46～550℃
Operator: Manual, Pneumatic, Electric, etc..
Application scenarios: Mainly used in industries such as petroleum, chemical, pharmaceutical, fertilizer, and electricity.
◎ Design Standard: API 599,GB/T 22130,API 6D
◎ Pressure Temperature Rate: ASME B16.34,GB/T 12224
◎ Face to Face: ASME B16.10,GB/T 12221
◎ Flange Standard: ASME B16.34,ASME B16.47,GB/T9113
◎ Butt Weld Standard: ASME B16.25,GB/T12224
◎ Fire Safe: API 607/API 6Fa
◎ 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.
Expanding Slab Gate Valve is a type of slide valve that utilizes parallel gate plates as its closing mechanism. These plates are equipped with a spreading mechanism to enhance functionality. The force pressing the plates against the valve seat is regulated by the medium pressure acting on either a floating gate plate or a floating valve seat. In dual gate flat gate valves, the inter-plate spreading mechanism provides additional pressing force. This valve is designed with innovative features including low operating torque, rapid actuation, minimal vibration, extended operational life, and enhanced safety. It is mainly used for the isolation or venting of gases and liquids in pipeline systems.
The Lifting Plug Valve adopts a unique dual-action design of lifting and rotation. When opening, it first lifts and then rotates to achieve zero-friction operation. It is particularly suitable for high-pressure difference, easily crystallizing and media containing solid particles. The valve body and the plug are both precisely ground, and the self-cleaning sealing surface design ensures reliable sealing performance under harsh conditions. It is widely used in high-parameter working conditions in the petroleum, chemical and power industries.