| 摘要 |
PROBLEM TO BE SOLVED: To provide a simple and low-cost pressure receiving structure of an atmosphere release valve.SOLUTION: A valve element 24 is arranged in a space communicated with a discharge pipe 40, and can come into contact with and separate from a valve seat 60. A diaphragm 22 has a first pressure receiving surface 70 facing an introduction pipe 48 and receiving a primary pressure P1, and a second pressure receiving surface 72 facing a discharge pipe 40 and receiving an atmospheric pressure P0, and receives a differential pressure (P1-P0) in a radially outward direction of the valve element 24 during the valve closing time. A supporting part 74 supporting the diaphragm 22 from the radial direction outer side at least during the valve closing time and receiving the force by the differential pressure (P1-P0) through the diaphragm 22 in such a manner that the pressure receiving force is larger in the valve closing time than in the valve opening time is provided on a body 30.SELECTED DRAWING: Figure 4 |
