| 摘要 |
PROBLEM TO BE SOLVED: To provide a float valve which can be used over the wide scope of pressure from low to high and causes no valve closing delay. SOLUTION: In thus float valve, a casing with a valve chamber 3 inside is formed by a main body 1 including an entrance 4, an exist passage 5 and an exit 6, and a cover 2 connected to the main body 1. A first valve seat 8 on which a first valve hole 7 is opened, is formed on the lower side wall of the valve chamber 3. A second valve seat 10 is arranged at the exit 6 side of the first valve hole 7 possible to move freely. The second valve seat 10 has a second valve hole 9 which is smaller than the first valve hole 7 and closes the first valve hole 7 at a position tightly attached to the first valve seat 8. An entrance chamber 12 opened to the valve chamber 3 is formed at the back of the second valve seat 10. A spring 13 to work as a valve opening force for the second valve seat 10 to open the first valve hole 7 is arranged. A float 15 which opens and closes the first valve hole 7 when the second valve seat 10 opens the first valve hole 7, and opens and closes the second valve hole 9 which is smaller than the first valve hole 7 in diameter when the second valve seat 10 closes the first valve hole 7, is arranged in the valve chamber 3.
|
