| 摘要 |
<p>A thermal servo-motor, particularly for valves, comprises two operating elements (6,7) which act oppositely on an actuating bridge (25), are thermally insulated from each other, and each have a temperaturedependent filling, particularly bellows boxes with liquid-vapour filling or cartridges with a solid filling. Each operating element is associated with an electric heater (30, 31) which are operable at different heating power. In particular, a heating coil (30, 31) is placed on the periphery of an outer capsule (8,9) of the operating element (6, 7). This allows wide scope in designing the servo-motor. Fig. 1.</p> |
