The jacketed insulation hard seal butterfly valve, also known as the jacketed butterfly valve, is developed based on the conventional three-eccentric metal hard seal butterfly valve. A metal jacket is welded onto the exterior of the valve body, and jacketed interfaces are installed on both sides of the insulation butterfly valve body. These interfaces can accommodate steam or other superheated gases to prevent the medium from solidifying or crystallizing at room temperature. The flange of the insulation butterfly valve is one to two sizes larger than that of the conventional metal hard seal butterfly valve, and it is primarily used in various systems such as petroleum, chemical, metallurgical, and pharmaceutical industries.
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