[PSUBS-MAILIST] regulator

[Alan via Personal_Submersibles]

Hank,
my two pennies worth... On a video I saw of Cliff ascending using the
new set up, there was a lot of air coming out, & I believe he has all 4 thrusters 
compensated off the one relieving regulator. There would be quite a lot
more air volume in his thrusters than in your manipulator.
I am not sure what pressure the relieving part of the regulator is set to
above the setting of the regulator. You could change the relieving regulator
spring to change this. You could also set up an experiment to see what
volume of air you could send through the orifice of the relieving part at
certain pressures. Block the inlet port of the regulator & put pressure in to
the outlet port so it goes out the relieving orifice. Alternatively If you knew 
the diameter of the relieving orifice someone like Hugh could probably tell 
you what volume would flow out at various pressures.
Also with your deeper diving the air's volume change is less the deeper
you go & most in the last 33ft of your ascent, so just do calculations based
on the volume doubling over the last 33ft.
Cheers Alan

Sent from my iPad

> On 16/03/2018, at 4:50 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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