Be sure you know how you want to connect the valve. If you want to connect
directly to your regulator, you may want the B-SS4 with 1/4-inch NPT threads
to go directly into your regulator.

Next you have to get the adaptor to connect your tubing. I think you have
two options:
1) One user uses a B-405-3 insert to connect aquarium tubing directly
into the valve.
http://fins.actwin.com/aquatic-plant.../msg00095.html

See p.52 of catalog:

http://www.swagelok.com/downloads/we.../MS-01-140.pdf



2) Option two would be a adaptor from 1/4-inch NPT to 1/8-inch hose
bard.

Here are some comments I found on the web on the Swagelok S-series valve:

"The valve is fantastic, allowing me total extremely fine control over my
CO2 flow rate. I can wind the rate from about 1 bubble every 5 minutes, to
about 4-5 bubbles a second, linearly, if the inlet pressure remains
constant. Changing the inlet pressure allows me a greater control range."

http://www.frii.com/~gbooth/AquaticC...Co2/valves.htm



"I can say that the Swagelok S has a control rate of 1 bubble/second/turn"

http://aquabotanicwetthumb.infopop.c...12&f=399606081
2&m=1326034082&r=7996026882#7996026882





I use just plain old aquarium tubing.

I am very happy with the following reactor:
CO2 Reactor

Plant Guild Power Reactor

http://www.familychest.com/plantguil..._reactors.html

Note some online aquarium stores now carry the larger version of this, which
is what I have.



Also, I would highly recommend the following:



CO2 Level Monitor

Dupla monitor - Dupla CO2 Dauertest

http://www.dupla.com/start_e.htm

--
Bob Alston


"WhiskerFish" wrote in message
...
Hello All

I have a 2 1/2 Watt per gallon planted 55 gal tank . I have
been researching and starting to put together a CO2 injection system
and am looking for some pointers/ do's and don't do's.

I am very fortunate to have a Swagelok distributer just a few
miles down the road. I have settled on the Swagelok B-SS2 metering
Valve. I am not sure yet but am leaning toward the Swagelok PFA
Tubing. It is supposed to be resistent to CO2 and Carbonic Acid.
Have any of you used this??

Next is a Anti-Siphon/ Check valve. Swagelok sells a few but
I am concerned about the cracking pressures. With a flow rate so low
it can be measured by bubbles per minute will the tube have enough
pressure to maintain the cracking pressure or would it cycle every few
minutes as it builds up pressure and then dump into the tank?? The
lowest I see in the catalouge is 1/3 of a PSI. I have the charts but
I am just not knowledgable enough in these things to figure it out!
If this will not work are there any recommendations??

Also I am looking for recommendations on a reactor/ chamber.

I hate throwing away money so thanks for any info anyone cares to
share!

WF