Quote: (Originally Posted by
Mixaddict)
I am assuming that your "AP buddies" are actually opening their OPV after they have done their pressure test?
Hi Randy, yes as above, I'm sure they open the valve up after the pressure test, but at least one has told me they thought it was still too tight and didn't like bothering with the pull dump. I didn't mean to give the impression that they were a bunch of dummies who all forgot to open the OPV after the test.
Quote: (Originally Posted by
Mixaddict)
There have been cases of lung over expansion injuries due to people either forgetting to do so or not being aware that this step is necessary. The AP OPV works just fine, it just shouldn't be necessary for it to be triggered. A diver should EASILY be able to recognize when there is a pressure differential and vent gas out their lips or nose or both without the OPV ever releasing.
IMHO, while the closing off of the OPV is helpful for the pressure test, it also means it's possible to forget to open it again. And having a strong spring which requires a pull dump style actuation means that it will probably always be tighter than a dry-suit style OPV, which IMHO may be too much. And I don't doubt that any CCR diver worth their salt will know when the lungs are too full, but will they remember to reach down and pull the cord in an emergency ascent? -Andy