Fabricated gasketed valve body construction for butterfly valves

Abstract

Abstract A FABRICATED PLATE METAL VALVE BODY HAS SPACED INNER AND OUTER METAL RING MEMBERS ASSEMBLED CONCENTRICALLY. VALVE OPERATOR TRUNNIONS ARE CONNECTED TO THE RINGS AND EXTEND IN DIAMETRICALLY OPPOSITE DIRECTIONS. A RUBBER GASKET IS MOLDED TO AND BONDED WITH THE METAL RINGS WITHIN THE OUTER RING AND COMPLETELY SURROUNDING THE INNER RING. THE GASKET HAS ANNULAR SEALING PORTIONS PROJECTING AXIALLY IN CROSS SECTION BEYON THE PLANES OF THE ENDS OF THE OUTER RING TO FORM SEALS ENGAGEABLE WITH THE ENDS OF PIPE FLANGES WITH WHICH THE VALVE BODY IS ASSEMBLED. A BUTTERFLY VALVE ASSEMBLED WITH THE VALVE BODY HAVING AN OPERATING SHAFT EXTENDING THROUGH THE TRUNNIONS AND A MOVABLE VALVE DISC CONNECTED TO THE SHAFT AND ADAPTED TO BE MOVED TO A POSITION IN SEALING CONTACT THROUGHOUT ITS PERIPHERY WITH A GASKET INTERIORLY OF THE INNER RING. THE INNER DIAMETER OF THE GASKET IS SLIGHTLY SMALLER THAN THE OUTER DIAMETER OF THE VALVE DISC WHICH ROTATES WITHIN THE VALVE BODY. PROVISION MAY BE MADE TO MINIMIZE ANY REDUCTION IN THE INNER DIAMETER OF THE GASKET INCIDENT TO EXPANSION OF THE GASKET MATERIAL FROM THE HEAT OF HIGH TEMPERATURE LIQUIDS PASSING THROUGH THE VALVE.

Inventors

• 👤 Herman S Church
• 👤 Duane J Clark

Bibliographic Details