Ca Reactor - Flow Control Valve

Scales · #1 12-08-2003, 05:06 PM

Any comments about the substitution of a flow control valve for the standard CO2 needle valve and bubble counter? I am building a Ca reactor and have heard this may be the better way to go. Any advice is appreciated.

Trevor.

Aquattro · #2 12-08-2003, 05:10 PM

Trevor, from what I've read about it (not much), the flow control valves are very expensive for something measuring such low flow.

Scales · #3 12-08-2003, 05:25 PM

I read an article by Sanjay Joshi that stated the flow control valve was cheaper than the needle valve and bubble counter combined. I will check out local prices later today (all this paper work on my desk gets in the way of my fun) once I figure out where to source these things ...where do you DIY guys buy your needle valves from?

Thanks.

Aquattro · #4 12-08-2003, 05:40 PM

Scales, your profile doesn't say where you're located, but if you're in the lower mainland, J&L caries them. You can also get a canreef valve from Titus by clicking the online store link to your right!

Scales · #5 12-08-2003, 06:14 PM

I should update my profile. I am in Langley. Thanks for your help.

Scales · #6 12-08-2003, 08:53 PM

I have found the recommended Dwyer Flow Control Valve for $77.50 in Vancouver. This is controlled by the included needle valve and would replace the standard needle valve/bubble counter set-up. The availabe flow is between 5-50 CC/minute (there are higher amounts available, but Mr. Joshi recommends this one and is using 20 CC/minute).

What do you DIY types think?...The cost of a needle valve by itself is $27.00 and I am unsure what it will cost to make a bubble counter...tough to analyze/compare not having made anything like this before...any other comments?

Cheers.

Aquattro · #7 12-08-2003, 10:45 PM

Bubble counters are cheap to make. Also, when you ask anyone on line for advice, they'll want to know the bubbles per minute rate, not cc's. You'll be on your own for advice that way. I've also read that people that did use them weren't happy with them. Do a search on RC for flow valves.

Jack · #8 12-09-2003, 01:46 AM

I'd go with a needle valve and bubble counter if you want to save money.

BCOrchidGuy · #9 12-10-2003, 06:44 PM

I found a needle valve for $22 in Burnaby, works just fine and I built a bubble counter, total cost (including 6 feet of 2 inch clear acrylic) less than $40.

Doug

Scales · #10 12-10-2003, 07:34 PM

Where did you buy the valve and acrylic from? I am also looking for larger diameter clear acrylic...

Do you think you have a need for six feet of two inch acrylic...if not, would you sell me a foot? It sounds inexpensive, but surplus stuff like that ends up in my garage, and into the hands of my kids, on into the landfill after they smash it all up

...

Thanks.

Trevor