[PSUBS-MAILIST] regulator

[Cliff Redus via Personal_Submersibles]

I did not purposely try a fast ascent with the intent of seeing of the
pressure reducing/releaving regulator could dump the air fast enough.  All
I can say is I have not any issues yet and yes the MM 101 thrusters have
double shaft lip seals orient to expect external pressure.  As such, if the
regulator could not keep up it would vent through these shaft seals.  To
date I have not observed this happening.  To me I would hold off putting a
pressure relief valve on this until you actually see an issue in the spirit
of KISS.  The volume of air in the actuators is small relative to the 4
MK-thruster that I have so the it is not a big volume of air to vent.

Glad to hear you put a variable speed control on your vertical thrusters.
I got to get you used to more electronics in your boat!

Best Regards

On Thu, Mar 15, 2018 at 10:50 AM, hank pronk via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Cliff,
> When you dove R-300 to 150 feet with your new regulator setup, did you do
> a rapid ascent to see if the regulator could dump the over pressure air and
> keep up.  I have a regulator for my arm on the way that is the same type as
> yours, but I have been thinking about the speed it can dump air.  With the
> trolling motors it is not so critical because the seal will act as a relief
> valve.  In the case of my actuators, the o-ring seals are very good.  I
> expect it could cause a problem if the regulator can't keep up.  Do you
> think I should instal a relief valve?  I have a small relief valve from a
> compressor tank that could be modified for the task.
> By the way, you should be proud of me, I am installing a speed control on
> my vertical thrusters.  Another electric part that could fail LOL.
> Hank
>
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