As its name implies, butterfly valves triple offset feature a third point of offset that’s more significant than double-offset designs. This angled position minimizes seat damage and preserves the integrity of the sealing surface. It also helps reduce the risk of sticking to the seats and lowers operating torque. This enables the valve to open and close quickly, while maintaining an effective bubble-tight seal with line pressure.
Like other butterfly valves, triple-offset designs are lightweight and easy to operate, making them a popular choice for fire-safe applications. They can withstand high temperatures and pressure levels, so they are suitable for petroleum refineries, power plants, and chemical plant processes that deal with harmful reactive chemicals. In addition, they can withstand abrasion and corrosion.
Environmental Considerations: Triple Offset Butterfly Valves in Green Technologies
Another advantage of these valves is that they provide a metal-to-metal seal, unlike gate and ball valves that use elastomers or soft material to create a frictional seal. This design makes them more resistant to temperature and environmental conditions, extending their service life. It also prevents the formation of cavities between the sealing components, reducing the likelihood of clogs and other issues that can lead to operational failures.
It’s important to choose the right triple-offset valve for your application, based on the type of fluid and system requirements. This includes determining the size and end connection type (flanged, wafer, or lug). It’s also a good idea to select a valve rated for the pressure and temperature level of your system.