The double flange triple offset butterfly valve is an advanced and high-performance type of butterfly valve designed to provide superior sealing capabilities, durability, and efficiency in critical applications across various industries. Let's delve deeper into its introduction:
Double Flange Design:
The double flange configuration refers to the valve body having flanges on both ends. These flanges provide secure connection points for bolting the valve into a pipeline, ensuring stability and ease of installation. The double flange design allows for bidirectional flow, meaning the valve can be installed in either direction within the pipeline.
Triple Offset Geometry:
Unlike conventional butterfly valves, which typically have concentric or single offset designs, the triple offset butterfly valve incorporates three distinct offsets:
Shaft Offset: The valve shaft is slightly positioned off-center from the centerline of the valve body, reducing friction and wear during operation.
Disc Offset: The valve disc is also offset from the centerline of the valve body, facilitating a tighter seal with minimal friction.
Seat Offset: The valve seat is machined at an angle to the centerline of the valve body, creating a non-rubbing, interference-free sealing contact between the disc and seat. This offset design significantly reduces wear and enhances sealing performance, particularly in demanding conditions with high pressures and temperatures.
Excellent sealing performance and tight shut-off, even in high-pressure and high-temperature applications.
Reduced wear and longer service life due to the triple offset design.
Bi-directional flow capability, allowing flow in either direction.
Reduced torque requirements and operating forces compared to traditional butterfly valves.
Suitable for various industries and applications, including oil and gas, petrochemical, power generation, water treatment, and HVAC systems.
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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