Hi All,
Bought a cheapo manual regulator and it is giving me hell. Never thought it was so difficult to regulator CO2 at 1BPS with a manual regulator. Did a search and found that needle valves are alot better. Does that mean that with the needle valve, once it is set it doesn't drift? And does it need time to stabilise or do I still have to fine tune?
i presume your regulator is the one with no gauge, one knob to adjust and very shallow screw threads on the injector (the needle part where the tubing is attached to)
costing about 12 bucks
in which case, no, a needle valve will do nothing for you simply because you can't attach it due to the shallow thread grooves
get a regulator with a good needle valve and flow will be mostly constant until the get starts to get empty whereby the flow rate will drop slightly
DEA,
Where do you reckon I can get them? Bioplast and/or NA? $?
go to nature aquarium and get his needle valve. you can get some co2 tubing ,
output of regulator hookup to the co2 tubing, at the other end, hook up the needle valve.
voila, as long as you can keep the output presure of the regulator low enough not to cos the co2 tube to explode, then you don't need to change nothing..
isn't the regulator output pressure fixed no matter how much the on/off tap is turned? if the output pressure is variable, then it shouldn't be called a regulator.
to me a regulator job is to reduce the tank pressure of 900+psi to say 10psi. then this output pressure is fed into a needle valve, which controls the flow rate.
thomas liew
pause a while
the regulator geoffrey is using is likely the cheapo taiwan one with only one knob
which means the knob is acting as a needle valve
which evidently isn't working well
if you want to modify it to work, bring it down to NA and let him see it
my gut feeling tells me there's probably no way
i had one once that had such shallow screw threads that i couldn't attach anything to the regulator safely
and no, it doesn't work with a solenoid
it'll just burst the tubing
so, whatever it is, just bring it to mr chan and see what he says
we can't tell without seeing the regulator itself
Guys,
Got it resolved. Had it modified at Sys & Engrg with their Bioplast needle valve. Works!!
how much did that cost u?
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