Eccentric butterfly valves are a type of industrial valve commonly used to control the flow of fluids in pipelines. They belong to the family of quarter-turn valves, meaning they operate by turning the valve disc a quarter of a rotation (90 degrees) to either fully open or fully close the valve. The term "eccentric" refers to the off-center positioning of the valve disc in relation to the valve shaft.
Key features of eccentric butterfly valves include:
Eccentric Design: Unlike traditional concentric butterfly valves, where the disc is centered on the valve shaft, eccentric butterfly valves have the disc offset from the centerline. This design allows for reduced wear and friction during operation, making them suitable for applications with high-pressure or high-temperature fluids.
Sealing Mechanism: Eccentric butterfly valves typically use a resilient seat or seal, which provides a tight shut-off and helps prevent leakage even under high-pressure conditions. The off-center disc design assists in creating a better sealing contact between the disc and the seat.
High Performance: Due to their design and sealing mechanism, eccentric butterfly valves are known for their high-performance capabilities, making them suitable for a wide range of applications, including water treatment, HVAC systems, power plants, and various industrial processes.
Low Torque Operation: The eccentric design reduces the torque required to operate the valve, which makes it easier to open and close even when dealing with larger sizes or higher pressures.
Bi-Directional Flow: Most eccentric butterfly valves are designed to handle flow in both directions, which adds to their versatility and usability.
Materials and Construction: These valves are available in various materials, including cast iron, ductile iron, carbon steel, stainless steel, and various alloys. This allows them to be compatible with different types of fluids and environments.
Control Options: Eccentric butterfly valves can be equipped with various actuation options, such as manual hand levers, gear operators, electric actuators, and pneumatic actuators. This provides flexibility in how they can be controlled and integrated into automated systems.
Applications: Eccentric butterfly valves find applications in industries where reliable shut-off and control of fluid flow are crucial, such as water treatment plants, oil and gas pipelines, chemical processing, pulp and paper production, and more.
It's important to note that while eccentric butterfly valves offer numerous advantages, they may not be suitable for all situations. Factors such as the type of fluid, pressure, temperature, and required level of shut-off performance should all be considered when selecting a valve for a specific application.
Eccentric Butterfly Valves Specification | |
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Size Range | 80 mm to 3800 mm |
Material of Construction | Cast Iron/Ductile Iron/2 % NICI/DI Ni Resist (D2Ni) Cast Steel/Fabricated Steel/Duplex |
Single Eccentric Butterfly Valve Pressure Rating | IS:13095 BS EN 593 (BS 5155) AWWA C 504/AWWA C516 |
Double Eccentric Butterfly Valve Pressure Rating | PN 0.6, PN 1.0, PN 1.6, PN 2.0 PN 6, PN 10, PN 16, PN 20 Class 25, 75, 150, 250 |
WCB Flanged Eccentric Butterfly Valve Size | DN50-DN600 |
WCB Flanged Eccentric Butterfly Valve Pressure | PN10/16/150LB |
Double Eccentric Butterfly Valve Pressure Rating | PN 0.6, PN 1.0, PN 1.6, PN 2.0 PN 6, PN 10, PN 16, PN 20 Class 25, 75, 150, 250 |
Triple Eccentric Butterfly Valve Size | 3”(100mm) - 118”(3000 mm)* |
Triple Eccentric Butterfly Valve PRESSURE CLASS: | Class 150 /Class 300* |
Triple Eccentric Butterfly Valve TEMPERATURE RANGE: | Up-to 550 °C |
seat/lining: | Replaceable / Bonded /vulcanized Liner NBR/EPDM/VITON, full lined PTFE/PFA |
DESCRIPTION | PRICE |
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Duplex Steel Eccentric Butterfly Valve Price | $ 95.20 - $ 135 |
Buy Eccentric Butterfly Valves Best Price | $ 78.12 - $ 80 |
High Performance Eccentric Butterfly Valves Price | $ 22.91 - $ 35 |
Stainless Steel Eccentric Butterfly Valve Best Price | $ 72.55 - $ 32 |
Super Duplex Steel Eccentric Butterfly Valve Price | $ 48.17 - $ 55 |
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