DOUBLE OFFSET vs TRIPLE OFFSET BUTTERFLY VALVE
Valves Only is top manufacturer of high quality valve, is pleased to provide a variety of product, such as double offset and triple offset butterfly valve. Our valve are engineered to satisfy need of industry demanding precision flow control, durability and reliability. Both double offset and triple offset butterfly valve serve important function in controlling passage of fluid.
It is “double eccentric” valve, has two of the most significant offset in design: one is in shaft’s positioning and another is in alignment of disc. The initial offset is eccentricity between shaft and valve body, whereas the second one is between disc and shaft. Through this kind of design, there is decreased contact between disc and seat at the time of opening and closing, which increases the sealing efficiency as well as lessens the wear.
A triple offset butterfly valve, or “triple eccentric,” is an advancement over the double offset design that includes a third offset. The third offset is the valve seat angle and the shaft centerline, which keeps the disc from touching the seat at all, even at the final point of closure. This specialized design improves even further the valve’s sealing characteristics and enables a stronger, tighter shutoff, especially where there are high temperatures or high pressures.
Principal Component of Double and Triple Offset Butterfly Valve
- Body: As with double offset valve, body of triple offset butterfly valve consist of long lasting material such as stainless steel to withstand high pressure condition.
- Disc: The disc of triple offset valve is more advanced in design to support smoother motion and improved sealing in high pressure.
- Shaft: The shaft of triple offset butterfly valve is located at three point of eccentricity which help in better sealing mechanism that lead to lesser wear.
- Seat: The seat of triple offset butterfly valve is specifically shaped and configured to ensure tight seal when closing the valve to avoid leakage even in harsh condition.
- Actuator: It can be electric, pneumatic or manual.
Working Mechanism
Double Offset Butterfly Valve
In a double offset butterfly valve, shaft and disc eccentricity enable valve to open and close without direct contact between disc and seat. This reduce friction and wear, hence increasing lifespan. When valve is closed, disc push against seat, creating tight seal, but design ensure that disc do not remain in constant contact with seat during operation reducing risk of damage and improving performance.
Triple Offset Butterfly Valve
It works on similar principle but with more advanced design. Apart from the two offset in disc and shaft, the third offset is seat angle. This ensure that disc is completely removed from the seat when valve is open, and only make contact with seat at the end of the valve closure. This design reduce seat wear and ensures a tight shutoff, making it especially well suited for high temperature and high pressure application.
Advantages
Double Offset Butterfly Valve
- Economical: Double offset butterfly valve are typically less expensive than triple offset valve, thereby providing an ideal solution for low sealing application.
- Efficient Operation: The offsetting feature minimize friction enabling reduced operation and increased valve lifespan.
- Flexibility: Double offset valve can be used in numerous application, ranging from water treatment to HVAC system and industrial process.
- Compact Size: These valves are light and compact compared to most other types of valve, which make them simpler to install in space constrained area.
Triple Offset Butterfly Valve
- Better Seal: The third offset provide tighter seal and improved performance in high pressure, high temperature, and critical service application.
- Less Wear: The special design reduce contact between disc and seat, which lead to less wear and longer valve life.
- Increased Durability: Triple offset valve are constructed to handle more severe condition than double offset valves, which make them suitable for high demanding industry such as oil and gas.
- Superb Shutoff: The triple offset configuration offer an almost leak proof seal, assuring consistent and effective flow control even during most crucial process.
Industries
Double Offset Butterfly Valve
- Water Treatment
- HVAC System
- Power Generation
- Chemical Processing
Triple Offset Butterfly Valve
- Oil and Gas
- Chemical Processing
- Marine
- Power Generation
Why is it Required?
Double offset versus triple offset butterfly valve selection really depends on the specific needs of the application. Double offset butterfly valves are appropriate for applications that do not need quite as tight of a seal or are less sensitive to heat and high pressure. Triple offset butterfly valves, however, are best for critical applications in which high pressure, temperature, and an assured seal are necessary. Our valves come with expert engineering, good customer service, and quick delivery so that your business can operate at full capacity without any interruption.
Conclusion
It is essential to know difference in double offset and triple offset butterfly valve when it come to making the appropriate valve selection for your application. Both valve type are highly suitable for managing fluid flow, but triple offset butterfly valve is far superior in context of high pressure, high temperature process thanks to better sealing and lower wear. By selecting Valves Only for your valve requirements, you are getting the benefit of years of experience as one of the major double offset and triple offset butterfly valve manufacturers in the USA.
