| 摘要 |
<p>The invention relates to a three-way valve for gas boiler, adapted to receive warm water produced by the burner (4) and comprising a shutter (10) adapted to selectively open the warm water outflow port (5) toward the heating circuit and the warm water outflow port (8) toward means which allow to transfer all the heat developed by the burner to the water of the sanitary circuit, the shutter (10) being actuated by a motor characterized in that it comprises a heat-sensitive element (14) which is adapted to axially expand as the temperature rises, acts on the shutter in contrast with elastic means (10R, 10C) and is inserted in a coupling associated with the valve and adapted to be flown by the sanitary-circuit cold water entering the boiler so as to be lapped at least by said cold water.</p> |
