| 摘要 |
PURPOSE:To improve the sealing performance when the a float valve is closed, by fixing a weight at a part of a float for level sensor and maintaining a certain posture in floated state of the float. CONSTITUTION:A float 20 for level sensor is formed from the foamed body which is made of oil-resisting synthetic resin and molded by using two molds having semispherical inner surface, and a metal weight 21 is fixed onto one semispherical body 20a so that the joint part 20c is not set upward. Therefore, the smooth surface of the float is always attached onto a valve seat 19 formed at the inlet of a negative-pressure chamber 15, and the sealing performance can be improved when the valve is closed. |
