Abstract: In a butterfly valve having: a seat ring that is mounted on the inner circumferential face of a valve body; a valve stem that passes through a through hole in the seat ring, and is supported by the valve body; and a discoid valve element that is supported by way of fixing the valve stem in a valve stem hole, and which is opened and closed as a result of the valve element turning together with the valve stem turning, a hollow cylindrical bush is inserted into the through hole in the seat ring, and is mounted in a sealed manner in a valve stem fitting hole provided in the valve element, without projecting beyond the outer circumferential face of the seat ring.

Abstract: A ball valve which is opened and shut by the rotation of a spindle (5) to rotate a valve ball (2) engaged with the spindle (5), characterized in that a neck portion (4) of a valve body bearing the spindle (5) is provided integrally therewith with a top flange (7) for mounting either of a handle or an actuator for the operation of the spindle.