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Re: CO2 dumping simulation
>Date: Tue, 19 Dec 2000 16:11:17 -0800
>From: Dave Gomberg <gomberg at wcf_com>
>The first one is an old
>rebuilt Norgren from many years ago. It is the regulator I normally use
>and it will dump. I measured the following (P1 is input pressure, P2 is
>Time P1 P2
> 0 850 15.1
>50 575 15.2
>60 500 15.2
>57 425 15.2
>65 350 15.5
>69 300 15.6
>73 250 15.2
>78 200 15.2
>82 150 14.8
>87 100 14.0 dropping to zero slowly
So, the 0.5 PSI "spike" is the infamous dump you've been warning us about
lo these many weeks?
>Then I tried a new Cornelius regulator from the high-pressure system I sell:
> 0 760 15.0
> 2 740 15.2
> 4 700 15.3
> 6 600 16.0
> 7 fall P2 rose quickly to 22, then dropped almost as fast, diffusor
>bubbling like crazy.
>You can pretty clearly see the dump
My lord, Dave, put a darn needle valve on the system and get over it. The
check valve/diffuser combo is clearly a sloppy and inadequate way to
control flow. Find a source for something like the $8 NO1 we used to use.
Stop driving us crazy by calling a minor increase in pressure a "dump" and
make the system stable the proper way with a flow regulator.
>This again underscores the importance of having a strategy to deal with
>dumping. I am looking as we speak for a relief valve that can be
>retrofitted into existing systems I have sold since so many folks want
>something more fool-proof.
>I am also looking into substituting a regulator that does not dump as
>vigorously as the current Cornelius. I would like to keep the price point
>pretty much the same tho, so this is a little tricky.
Is anyboby else shaking their heads at the relative nonsense of this all?
George Booth in Ft. Collins, Colorado (booth at frii_com)
"The web site for Aquatic Gardeners by Aquatic Gardeners"