ball member for a valve assembly, the ball valve assembly havinga ball member and method for controlling the temperature ofa ball member

摘要

A ball member for a ball valve assembly including a valve housing, wherein the ball member (4) is rotatably arranged relative the valve housing (20) about an axis of rotation (B) and is provided with a through hole (41) forming a passageway for fluids, the ball member (4) having an outer wall (42) facing the valve housing (20) and an inner wall (43) facing the through hole (41) arranged such that a hollow space (40) is formed between the walls (42, 43), the ball member (4) further comprising temperature controlling arrangement for injecting a temperature controlling medium into the hollow space (40) so that a temperature of the inner wall and/or outer wall can be controlled and a first stub shaft (10) and a second stub shaft (11), wherein said first stub shaft (10) extending from the inner wall (43) along said axis of rotation (B), and said second stub shaft (11) extending from the inner wall (43) along said axis of rotation (B) on an opposite side of the through hole (41).