hey folks,
i am considering to get a needle valve for i know that its the only equipment that gives you a steady and correct BPS reading.
however i am currently using a manual regulator which decreases in the bubble count (observe from bubble counter) over time.
would using a needle valve and subsequently using switching the regulator to a higher flow rate (to adequately offset any decrease) help?
For me, I bought a needle valve from Systems Control and Engineering to use with my manual regulator that didn't stay at the same bubble count for less than a day. It didn't work for me, although I was tuning and tuning and twisting this and that. That's my case, not sure about yours
okie,
looks like i have to do fine tuning with the manual regulator rather then get a needle valve.
thanks alot for replying to this and the other fert post.
jiesheng
hey just to add,
does switching to the solenoid removes the problem of irregular bubble count?
jiesheng
Get a proper regulator which regulates the pressure from few thousand PSI to 10-15psi rather than installing a needle valve to the "throttle" valve which you are using.
Regards
Peter Gwee
Nope, a solenoid doesn't solve the problem. A solenoid is merely a electronic on-off switch.
Get a regulator like Peter mentioned... it'll solve you a lot of problems trust me. I've been through the crap, screwed up my planted tank as a result because of the irregular bubble count and all. Get the 2 gauge regulator, as in one that doesn't allow you to twist and turn a knob.
The total number of knobs on your cylinder set should be two: a big one on the cylinder itself, and the needle valve knob.
okay kewl.
i was not thinking when i got my single gauge. i woul be better off with a guageless regulator. maybe i will find some time to procure the equipment.
thanks alot folks
I have the same proble with turning the knob every 2 days - using same needle valve and the same manual gauge in my last setup that was years ago.
Until I started reading this forum then I realized the solution is for 2 gauges. But now I'm blur again. I've always thought 2 gauges means 1 pressure gauge (equiv to manual gauge) & 1 solenoid.
So what exactly does the 2nd gauge you guys are referring to huh?
How much one set huh..............? Velie poor this month
Newbie in Aquatic Tank Setup....
Taken from here
That's the two gauges we are referring to
ok from the pic above, 1 gauge is pressure meter, the other gauge is content meter.
for a pressurised tank, doesn't the pressure meter tell the amount of gas left too?
Newbie in Aquatic Tank Setup....
Yeap. The pressure meter shows the pressure of the gas in the cylinder, the content meter shows the regulated gas pressure. Once the pressure gauge starts falling, the liquid gas is used up, and there's only gaseous gas left.
anyone tried this kind of nedle valve,
i got this unit from my friend.
it usually used in laboratory he said.
the precision can reach about 1 nanoliter/ minutes
it connected to 24 volt selenoid (kyoganei)
regards,
yudy
Terence, so with this kind of regulator including the needle valve, we are sure to get consistent bubble count?Originally Posted by |squee|
Taken from here
That's the two gauges we are referring to
BTW - do they sell something like that w/o the solenoid? Approx price and where to get?
koah fong
Juggler's tanks
The bubble counter shown in the diagram sits too close to the valve for comfort. There is always the risk of water backflow into the tank, as my experience has shown. My b.c. is separated from the valve by a short length of tubing, but even so, I see some backflow in the tube after the solenoid goes off. Is the bubble counter in the JBJ setup 100% airtight? That's something to think about.
the bubble count is consistent enough that you do not notice any difference in bubbling rate.
you can get the bioplast regulator without solenoid. cost in the region of $150. and the output pressure can be adjusted as well.
thomas liew
the bubble counter has a built-in check valve.
and there should be no backflow after a check valve. you should have a check valve after the needle valve.
thomas liew
interesting. have you hooked it up to try?
these needle valves may be too precise for aquarium application. good if you need to have very precise control of low flowrates. may not be able to use for high flowrates.
thomas liew
hi,
i didn't connected it to my co2 tank,
but once i connected it i will inform you all the result.
i'm looking for PU connector for those interesting nedle valve...
regards,
yudy
Any idea where I can purchase this? Thanks in advance!anyone tried this kind of nedle valve,
i got this unit from my friend.
it usually used in laboratory he said.
the precision can reach about 1 nanoliter/ minutes
it connected to 24 volt selenoid (kyoganei)
regards,
yudy
No idea there. So far it's been consistant, much much better than my previous manual regulator.However, I noticed a slight change in bubble count over the months, probably due to heat expansion and contraction of the knob on the needle valve. So just check regularly.
No idea if they just sell the regulat without the solenoid. But I heard the solenoid was removable?
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