Re: [APD] End of the tank dump (pressure)

["S. Hieber" <shieber at yahoo_com>]

It depends on a few things, not the least of which is your
particular regulator.  It could be as low as less than 100
pounds or it could be much higher.  Also, as the tanks
empties and the low side pressure increases, the safety
blow-off that some regulators have will vent the tank into
the room. So the tank can look fine at several hundred psi
(high side pressure) and then the next time you look, the
tank is empty.

If you keep adjusting the regulator as the tank high side
pressure decreases, you can "milk" more of the CO2 from the
CO2 tank.  But when you refill, you will have to remember
to reset your regulator.

Scott H.
--- Billionzz at aol_com wrote:
> Hi,
> 
>  What is the average pressure when the end of the tank
> dump occurs? Not the 
> pressure it starts at but how much pressure is released
> to the needle valve? 
> 
>  The reason I am asking this question is because I put a
> relief valve between 
> my regulator and needle valve. I am running around 20psi
> thru the needle 
> valve and my relief valve opens at 25psi with a max input
> of 300psi.
> 
>  If the end of the tank dump is higher than 300psi I plan
> on installing 
> another relief valve before the existing one that will
> open at 250psi and have a 
> max input of 1000psi.
> 
> I am still on my first tank of CO2 so all of this is new
> to me. I still plan 
> on refilling my tank when it starts to drop but I was
> hoping that the relief 
> valves would provide extra safety just in case.
> 
> Thanks,
> Bill
> _______________________________________________
> Aquatic-Plants mailing list
> Aquatic-Plants at actwin_com
> http://www.actwin.com/mailman/listinfo.cgi/aquatic-plants


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