| 摘要 |
A butterfly valve for high pressures in the range of 150 to 2500 pounds per square inch and high temperatures in which the valve member is cammed by axial movement of the stem to the closed position by a cam in a diametral slot in the valve member and the valve member is rotated between closed and opened positions by rotation of the stem and the cooperation of the same cam and slot. The valve disk may be restricted from motion in the axial direction by a retaining cover for the slot. In a preferred form, the valve stem is located between the valve disk and the retaining cover.
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