Ball valve is controlled by wires made from shape memory alloy attached to spring, on which ball is mounted, which shorten when they are heated and remove ball from, or lower it into, fluid channel

摘要

The ball valve is controlled by wires (2) made from shape memory alloy. These are attached to a spring (10), on which the ball (6) is mounted. The wires shorten when they are heated and remove the ball from, or lower it into, the fluid channel (11).