What is Double Offset Butterfly Valve?
Double offset butterfly valves are critical components in various industrial applications. They effectively control fluid flow with minimal pressure drop. This article explores their design, functionality, advantages, and common applications. Take an insight into TWT, a leading manufacturer in the valve industry.
Understanding the Double Offset Butterfly Valve Design
Design Features
Double offset butterfly valves, also known as high-performance butterfly valves, have two offsets from the valve body’s center:
- The shaft axis is offset from the disc’s seat and body seal’s centerline, and
- The shaft axis is eccentric to the pipeline’s/valve’s center line.
This unique design helps minimize turbulence and ensures a tight seal, making these valves ideal for a variety of applications.
How They Work
A butterfly valve has flanges on both the inlet and outlet faces, which makes the connection between the valve and the pipe very easy and will not leak. As well as the pipe end connected with the valve is also designed to be the same size as the flange and hole on the flanged valve. In general, these valves offer defect-free and worry-free performance.
Key Components
- Body: Typically made from durable materials like ductile (ASTM A536 /GGG40).
- Disc: All made in ASTM A536/ GGG40
- Stem: Stainless Steel: ASTM A182 304/316/431/ Duplex Stainless Steel
Applications of Double Offset Butterfly Valves
These valves are widely used in various industries due to their robustness and efficiency:
| Application Field | Specific Applications | Key Advantages | Industries |
|---|---|---|---|
| Fluid Types | Corrosive gases, chlorine, oxygen, seawater, acidic gases, steam, toxic substances, ultrapure water, vacuum, wastewater | Lightweight, cost-effective, capable of handling extreme pressures and temperatures | Chemical, Food and Beverage, HVAC, Mining |
| High corrosion resistance | Oil and Gas, Petrochemical, Pharmaceutical | ||
| High design strength | Power Generation, Pulp and Paper, Refining | ||
| Versatile in various applications | Sugar Processing, Water Filtration |
Advantages of DN1400 Flange Dimensions Double Offset Butterfly Valves
- Reduced Friction: The offset design minimizes contact between the disc and the seat, reducing friction and wear.
- Cleanability: Due to the self cleaning(no residue will be trapped) function, it’s also easy to clean and disinfect for potable water systems, etc.
- Lightweight and Compact: Compared to other valve types, double offset butterfly valves reduced weight and overall dimensions, making them easier to install and maintain.
- Versatility: Installation without restriction in the direction of flow (polished disc rim to avoid damage to the valve seat. For installation there is no gasket needed).
- Cost-Effective: Low-pressure loss and reduced energy costs. Good corrosion resistance.
- Multiple Option
- Manual, electric actuator, pneumatic actuator, hydraulic actuator, and bare shaft are optional
- Water, drinking water, portable water, Oil, seawater, and gas are all available working services.
- Size is from DN150-DN3600
Conclusion
Double offset butterfly valves play a vital role in fluid control across many industries. Their unique design offers significant advantages, including improved sealing, reduced wear, and versatility in application. Companies like TWT lead the way in providing high-quality valves that enhance efficiency and reduce costs.
For more information on double offset butterfly valves and TWT’s offerings, contact us by phone at +86 18722007022 or email us at [email protected]