Triple Offset Butterfly Valve Advantages

triple offset butterfly valves

triple offset butterfly valve a number of advantages over other valve types including gate, globe and plug valves. These include lighter weight, less space required and lower operating torque making them more suitable for automation. This type of valve is also ideal for a wide range of applications including corrosive, abrasive and steam. In addition, these valves are well suited to highly cyclic and high-pressure drop process conditions.

Triple offset butterfly valves differ from double offset in that the third point of the offset is relative to the geometry design of the sealing components rather than the shaft itself. The sealing points on both the disc and seat are each machined into an offset conical shape which results in a cam-action and right-angled design that prevents any contact between the two until the final degree of closure. This eliminates the blind zone and provides consistent operation with repeatable shut-off.

The Role of Triple Offset Butterfly Valves in Oil and Gas Industry

Unlike double-offset valves which use plastic deformation to create a seal, the triple-offset valve relies on the contact pressure of the valve seat against the disc edge. This minimizes friction and extends seat life. In fact, it’s not unusual for this type of valve to have a ten-year seat life.

In addition to the above-mentioned benefits, the unique geometry of this type of valve also helps to reduce wear on both the seat and disc. This, in turn, extends the life of the seating material and enables the valve to perform in even the harshest environments.

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