In triple offset butterfly valves, an angular offset in the body sealing cone axis is made in addition to the first two offsets (third offset). This is accomplished by using the right-angled conical profile of the seat coupled with a matching profile at the disc edge. This offset eliminates the contact of the seat and the disc during valve opening and closing, hence, friction is also eliminated. Contact only occurs during the full closure of the butterfly valve; this also acts as a mechanical stop to prevent the disc from rotating further.
Triple offset butterfly valves are designed with metal seats, which are more durable and rigider compared to soft seats. This makes them capable of handling higher temperatures and fluid pressures, thereby reducing valve wear. The metal seats ensure a reliable seal, preventing any fluid leakage from the valve. As a result, triple offset butterfly valves generally have a longer service life than both zero offset and double offset butterfly valves.

Triple offset butterfly valves are well-suited for managing high-pressure and superheated steam, as well as high-temperature liquids, gases, and corrosive chemicals that exceed the capabilities of valves with soft seats. These valves are frequently used in industries such as power generation (e.g., on-off valves for boilers), oil and gas processing, chemical production, pulp and paper manufacturing, and offshore pipeline systems.