| 摘要 |
This pressure regulating valve is provided with a body (2), and with a valve element which partitions the interior of the body into a pressure regulating chamber, which communicates with a low pressure-side passage and a high pressure-side passage, and an atmospheric pressure chamber, which leads to the atmosphere. The valve element is configured so as to be displaced in a direction in which the volume of the pressure regulating chamber is changed on the basis of the pressure inside of said pressure regulating chamber; thereby, the pressure regulating chamber either is allowed to communicate with or is cut off from the high pressure-side passage. The pressure regulating valve is provided with a cap (13) which covers the portion of the body (2) where the atmospheric pressure chamber leads to the atmosphere, and with a labyrinthine-structure communication unit (14) which is formed between the inner surface of the cap (13) and the opposing outer surface of the body (2) and allows the atmospheric pressure chamber to communicate with the atmosphere. |
