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Re: [PSUBS-MAILIST] Piston pressure regulator
Hi Silky,
Get a set of the 2003 PSUBS Convention DVD's. Pierre
did a talk where he extensively covered his design.
Regards,
Ray
--- s ï l k y N?³ <silkyfx@hotmail.de> wrote:
> Hey Pierre,
> Yea you assumed correctly and i like your idea. dono
> why i didnt think of
> that its less prone to inaccuracy because its mush
> simpler to check the
> setting with the gage. i have some questions about
> BIG:
>
> how dose BIGs hatch seel? how did you make that
> seel?
> i noticed that thr is a hatch clip on the outside,
> can it also be opned from
> the inside? how?
> How dose air go from the scuba tanks into the hull?
> how is the brathing air
> flow regulated?
> Dose BIG have a web page?
>
> thnx
> silky
>
> >Hi Silky,
> >
> >I like your idea.
> >
> >As for (3) emergency use, I assume that one side of
> the piston (the side
> >with the spring) must be at 1atm of else you would
> only mesure pressure
> >difference...
> >
> >I have another idea. If instead of using spring you
> use compressed air on
> >one side of the cylinder. So you want max deep of
> 100 foot (50 psi). you
> >slowly open a valve from air tank and adjust
> pressure inside cylinder to 50
> >psi with a gage. That way, it could be easy to
> adjust and also be variable
> >adjustement for any situation.
> >
> >We could also used electricity for valves because
> lots of pneumatic
> >cylinder already commes with limit switches mounted
> on the core of the
> >cylinder. Off the shelf and ready to use.
> >
> >My 2 cents to your idea...
> >
> >Pierre Poulin
> >
> >----- Original Message ----- From: "s ï l k y N?³"
> <silkyfx@hotmail.de>
> >To: <personal_submersibles@psubs.org>
> >Sent: Friday, June 10, 2005 4:39 AM
> >Subject: [PSUBS-MAILIST] Piston pressure regulator
> >
> >
> >>Hey,
> >>
> >>I have posted a picture on moki. It shows the
> basic principle of a methord
> >>that could be used to regulate (three things) (1)
> the air pressure
> >>difference between water and in hull. (2) Vent air
> out of an ambieus sub.
> >>(3) automaticaly bring the sub back to the surface
> if it goes under a
> >>preset depth (too near crush depth or Air related
> depths)
> >>
> >>(example) the idea is 1 lubricated water proof
> piston with two open sides.
> >>one open side exposed to the outer water pressure
> and the other to the
> >>inside pressure. The displacement from its central
> position due to presure
> >>difference is used to open - close two valves. one
> valve leads to the
> >>breathing air suply the other (2) IS the air out
> vent.(link to image at
> >>bottom)
> >>
> >>Adjustable spring(s) could be used to controle the
> sensetivity of this
> >>system. This could if implimented correctly be
> used to reduce the
> >>probability of the piston bouncing up and down
> effect and reduce the
> >>amount of air wasted due to small vertical
> movements.
> >>
> >>How to use this as an emergency system (3) one
> could for example use a
> >>stiffer spring to encrease the pressure needed to
> activate a valve and
> >>increase the distance the piston must move before
> the valve is activated.
> >>In this case the activated valve would be a
> secondairy blow ballast valve.
> >>
> >>I have scribles, notes & workings If you want more
> info.
> >>
> >>thnx silky
>
>
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