| 摘要 |
Disclosed herein is a drain valve (2) for a bathub (1) or other gravity drained container. When energized with an electrical pulse, a solenoid (18) mounted directly below the drain elbow drives the poppet (5) upward, which unseals the outlet drain (3). A permanent magnet (20) latches the solenoid armature (12) in place in the up position. The valve (2) is closed by energizing the solenoid (18) with a pulse of opposite polarity which pulls the armature (12) downward and out of the influence of the permanent magnet (20). A piston (10) in a sleeve overnested by a movable shroud (8) provides leakage protection and allows manual opening and closing. |
