| 摘要 |
The present invention describes a ball valve that opens when suction is applied at the top of the ball and closes once the suction is removed. The activation force is created by suction and the deactivation force is gravity. Advantageously, the ball slides on a guide post that ensures that the ball falls into the proper orientation in the valve seat. The top of the guide post has a limit stopper that prevents the ball from opening too far.
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