Double seat valve

US7845368B2 · kind B2 · utility

Assignee

• Tuchenhagen GmbH · DE

Inventors

• Jens Burmester · Grambek, DE
• Matthias Südel · Ratekau, DE

Key dates

• Filing date: Apr 1, 2006
• Grant date: Dec 7, 2010
• Expiry date: Aug 1, 2026

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/88038
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A double seat valve in which a second closing element (4), in its closed position, rests with a stopping surface (4f) on a face of its cylindrical projection (4*) directly upon a first seat (2a) and, together with a peripheral wall (4c, 4h), forms a second wraparound edge (U2) upon an interface (2e, 2e*). The peripheral wall (4c), at its end facing away from a first closing element (3), merges into a rotationally symmetric reversing surface (4d) that leads to a face (4e) of a recess (4b) oriented essentially perpendicular to the longitudinal axis of the second closing element (4). In meridian section, the reversing surface (4b) has a contour (K) with a bend-free curve, a direction vector in the leading point of the reversing surface (4d) points into a discharge borehole (3d, 3d*) central in the first closing element (3) without colliding with the first closing element (3) in the vicinity of its areas bordering the leakage cavity (5) and forming dynamic pressure.