Abstract: A triple offset butterfly valve includes a valve body defining a valve orifice and a valve member rotatably mounted in the valve orifice. The valve member includes a disc element detachably mounted to a mounting plate; the valve member being mounted to a rotatable axle which extends between the disc element and mounting plane thereof. The valve body has an annular valve seat against which the disc element of the valve member seals when the valve is closed. In use, when the valve components become worn, the disc element of the valve member can easily be removed as a complete unit and replaced. In this manner, the need for a removable seal on the valve member is avoided, which reduces the number of potential leak paths as compared to known butterfly valves.

Abstract: A triple offset butterfly valve includes a valve body defining a valve orifice and a valve member rotatably mounted in the valve orifice. The valve member includes a disc element detachably mounted to a mounting plate; the valve member being mounted to a rotatable axle which extends between the disc element and mounting plane thereof. The valve body has an annular valve seat against which the disc element of the valve member seals when the valve is closed. In use, when the valve components become worn, the disc element of the valve member can easily be removed as a complete unit and replaced. In this manner, the need for a removable seal on the valve member is avoided, which reduces the number of potential leak paths as compared to known butterfly valves.