Double flange triple offset butterfly valves are designed to meet various industrial requirements and applications. While specific configurations may vary by manufacturer, some common types include:
Metal-Seated Double Flange Triple Offset Butterfly Valve: This type of valve features metal-to-metal seating between the disc and the valve seat. It is suitable for high-temperature and high-pressure applications where tight shut-off and durability are critical.
Soft-Seated Double Flange Triple Offset Butterfly Valve: Soft-seated valves use resilient materials such as elastomers (e.g., EPDM) for the seat, providing a bubble-tight seal. They are suitable for applications where tight shut-off and bi-directional sealing are required.
Superior Sealing: The triple offset design provides tight sealing, even in challenging conditions with high pressures and temperatures, minimizing leakage and ensuring operational safety.
Durability: The robust construction and advanced materials used in the valve's manufacturing enhance its longevity and resistance to wear and corrosion.
Efficiency: The low torque requirements and reduced operating forces of the valve contribute to smoother operation and energy efficiency.
Versatility: Double flange triple offset butterfly valves offer versatility in terms of installation orientation and compatibility with various fluids and operating conditions.
Butterfly valves are quarter-turn valves that are best used for the stop/start of media flow in pipelines. When the valve handle is turned 90°, it either opens or closes completely. Throttling can be a bit tough, but these valves can still be used for regulating purposes.
Butterfly valves are usually installed in a fully open position. This is because installing the valve in its closed position can cause difficulties with the seat and seal positions.
Triple Offset: The term "triple offset" refers to the geometry of the valve's sealing mechanism. Unlike traditional butterfly valves, which have a concentric or single offset design, triple offset butterfly valves have three distinct offsets:
Shaft Offset: The valve shaft is positioned slightly off-center from the centerline of the valve body, reducing wear and friction during operation.
Disc Offset: The valve disc is also offset from the centerline of the valve body, which helps in achieving a tight seal and reducing friction.
Seat Offset: The valve seat is machined at an angle to the centerline of the valve body, allowing for a non-rubbing, interference-free sealing contact between the disc and the seat. This design minimizes wear and improves sealing performance, especially in high-pressure and high-temperature applications.
| Material |
| Body |
Carbon Steel(WCB A216), Stainless Steel(SS304/SS316/SS304L/SS316L) , Duplex Stainless Steel(2507/1.4529) |
| Disc |
Carbon Steel(WCB A216), Stainless Steel(SS304/SS316/SS304L/SS316L) , Duplex Stainless Steel(2507/1.4529) |
| Stem/Shaft |
SS416, SS431, SS304, SS316, Duplex Stainless Steel, Monel |
| Seat |
2Cr13, STL |
| Packing |
Flexible Graphite, Fluoroplastics |
| Actuator |
Hand Lever, Gear Box, Electric Actuator, Pneumatic Actuator |
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