Choosing the right type of butterfly valve is essential to the success of any flow control project. There are a number of benefits that come with using a triple eccentric butterfly valve, including higher savings and improved life cycle costs. These advantages can be attributed to the fact that they offer metal hard sealing, are more resistant to high temperature and pressure environments, and require lower operating torques than traditional butterfly valve products.Source: https://www.shiphamvalves.com/solution-category/triple-offset-butterfly-valves/

A triple eccentric butterfly valve is an on/off, throttling valve that has a quarter-turn operation. They are available in cast iron or stainless steel with a choice of seat materials including Buna, EPDM, VITON, Teflon, and natural rubber. The triple offset design allows the shaft to engage with and disengage with the seat/seal ring without any interference, eliminating all rubbing motion over a full 90 rotation. This eliminates unnecessary wear and extends the life of both the seat and seal.

Triple Eccentric Butterfly Valves vs. Traditional Valves: Which is Right for You?

The absence of cavities between the sealing components in a triple-offset valve is another benefit. This prevents debris from clogging the valve like it would in other types of butterfly valves, which helps to minimize maintenance and repair costs over time.

This type of valve is also commonly referred to as a high-performance butterfly valve and it’s most suitable for applications with thicker media and high operating temperatures, or when a zero leakage closure is required. The geometry of this valve enables the disc to self-adjust against the center, which helps it to maintain a close seal even in severe conditions such as pressure peaks or thermal shocks.