| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressure control valve that can prevent deterioration of airtightness.SOLUTION: A valve seat support member 39 that has a valve seat 38 formed of an elastic material and a valve seat accommodation chamber 392 for accommodating the valve seat 38 is arranged between a high pressure chamber 314 to which high pressure gaseous fuel flows in and a low pressure chamber 318 in which gaseous fuel from the high pressure chamber 314 flows. When a metallic end surface 393 on the high pressure chamber 314 side of the valve seat support member 39 abut on an inner wall surface 310 of a cylindrical portion 311 of a first valve housing 311, a clearance is formed between an end surface 382 on the high pressure chamber 314 side of the valve seat 38 and the inner wall surface 310 of the first valve housing 31. Due to this configuration, since axial force of a retainer 395 for fixing the valve seat support member 39 to a predetermined position is not applied to between the end surface 382 of the valve seat 38 and the inner wall surface 310 of the first valve housing 31, the valve seat 38 is not plastically deformed. Therefore, a pressure control valve for gaseous fuel can securely maintain airtightness between the high pressure chamber 314 and the low pressure chamber 318 for a long time. |
