MikeHalloran, Thank you for the response. What you said is how I approached the problem.
I've redesigned it to use a "pressure balance" concept so that flow is coming in from both sides of the part. I've got a cross section of the new design with FBD and analyses I'd like to show you for...
I have an issue with a flood valve design...
We send pipe subsea that has an end closure on each end of the pipe.
The end closures are designed to prevent water from enterying during pipe deployment
-AND-
Flood the valve once the pipe is installed.
We flood the pipe via a shuttle valve...