| 摘要 |
<p>A valve includes a passage. A first sealing element is biased to restrict flow of a fluid in a first direction through the passage when an upstream v olumetric flow rate of the fluid in the first direction is less than a first predetermined threshold. A second sealing element is biased to unrestrict f low of the fluid to a baseline unrestricted flow rate in a second direction through the passage when an upstream volumetric flow rate of the fluid in th e second direction is less than a second predetermined threshold.</p> |
