Hi guys,
How about trying an air over oil proportional pressure compensating valve. Parker-Hannifin makes them. If the air fails have a Haskel hand pump as backup.
Regards,
Carl D.
On Sat, Sep 6, 2008 at 2:23 PM, Carlos Del Valle
<carlosd072657@gmail.com> wrote:
HI Joe, I'm building an ambient sub and posted the original question.
My worst case scenario would be a pneumatic system failure.
If a high pressure line ruptures, it would immediately fill my ballast tanks.
The ascent rate would far exceed the limits.
I'm installing a 2" ID dump valve in the MBT, and ABT.
My sub/ballast tanks are small, so this should do the trick.
If not, I have a bailout bottle and easy egress
Regards, Carlos
On Thu, Sep 4, 2008 at 9:59 AM, Joseph Perkel <joeperkel@hotmail.com> wrote:
> Someone asked about venting an ambient.
>
> I found some PVC check valves today which could quite possibly do the trick
> but I think you would have to ask two questions.
>
> What would a cracking pressure of 0.5 to 2 lbs translate to in hull
> overpressure, and how many would be required to dump expansion in an
> emergency ascent from max depth.
>
> Otherwise, these look pretty nifty!
>
> Joe
>
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