| 摘要 |
A system including a backpressure valve (BPV) system (36) configured to mount in a hydrocarbon extraction system, wherein the BPV system includes a body comprising a vent port (130) and a test passage (94), and a plunger (76) configured to form a seal with the body around the vent port wherein the BPV system is configured to test the seal by pumping a fluid into the body through the test passage. |
