| 摘要 |
PURPOSE:To obtain constant valve closing force even if fluid pressure is high by energizing a valve seat with an elastic member produced slightly stronger than the fluid pressure and weaker than floating force or a force combined by gravity of a float and the fluid pressure. CONSTITUTION:A float 6 is floated up and down in accordance with the liquid level in a valve room 3 and separated or put on a valve seat 8 to open or close a valve port 7. After the float 6 is contacted to a float seat 13, the float 6 is controlled by the float seat and is not displaced more to the valve seat direction. The float 6 is contacted to the float seat 13 by a force of fluid pressure and floating force or dead weight, and in this condition, the valve seat energized by an elastic member is contacted to the float to close the valve. Therefore, the float 6 and the valve seat 8 can close the valve with a constant elastic force by the elastic member regardless of fluid pressure. |
