I am trying to set up my high pressure c02 system and am having problems with the needle valve. I have tried a cheap needle valve from home depot and it did not work, it just leaked, and then bought a parker valve from grainger. The parker valve will not give the flow rate of 1 or 2 bubbles a second. Anybody have a needle valve that they use that works. I have set my output pressure at 20 psi and even tried it at 10 psi with no luck on both valves. I am open for suggestions. Thank you in advance
c02 needle valves
- Thread starter muskieswen
- Start date
Depending on the specific valve, Parker makes GREAT needle valves for aquaria usage. I personally use the Clippard valve, as do lots of other people.
For lots of info on needle valves look here:
http://members.cox.net/tulsaalstons/Documents/Aquarium Needle-Metering Valve Recommendations.htm
For other info on pressurized co2 look here:
http://members.cox.net/tulsaalstons/AquaticPlants.htm#High Pressure CO2
Bob
For lots of info on needle valves look here:
http://members.cox.net/tulsaalstons/Documents/Aquarium Needle-Metering Valve Recommendations.htm
For other info on pressurized co2 look here:
http://members.cox.net/tulsaalstons/AquaticPlants.htm#High Pressure CO2
Bob
I don't understand.....what do you mean by, "won't give the flow rate of 1 to 2 bubbles a second"?
You should have no problem setting a flow rate with a Parker.
Len
You should have no problem setting a flow rate with a Parker.
Len
djlen,
I have the valve closed all the way and there is still a steady stream of bubbles. Granted I have no clue what the heck I am really doing but I thought i was supposed to try for a starting point of 1 to 2 bubbles a second out of the needle valve. The valve according to the grainger manual is a parker model number PF400B with a cv rating of .78. Any suggestions?
I have the valve closed all the way and there is still a steady stream of bubbles. Granted I have no clue what the heck I am really doing but I thought i was supposed to try for a starting point of 1 to 2 bubbles a second out of the needle valve. The valve according to the grainger manual is a parker model number PF400B with a cv rating of .78. Any suggestions?
That valve is wrong. The openings are too big. My clippard has a max cv of .004 Good Parker and Swagelok valves have max cv of .004 to .007. And a really nice parker valve has a cv of .0004
Do take a look at the link I recommended above.
Bob
Do take a look at the link I recommended above.
Bob
Sounds like a bad valve. Can you take it back or is it even worth the effort?
If not go here:http://www.clippard.com/store/search.asp?sku=&description1=needle+valves&andOr=and&description2=
If you look down the list you will see model MNV2. I use that one in two of my tanks and like it because it is adjusted by via screw driver which makes minute adjustments easier for me, and also makes it tougher to accidentally turn. However there are many other models with burl knobs for adjusting. I know many people use the KNV1KP.
Clippard, IMO makes the best and most reliable valves for our purposes.
Anyway, once you decide which one you want, look to the left on the page and click on distributors and find one close to you. If there is one nearby, you'll save on shipping costs. (acknowledgment to Bob Alston who clued me in to this feature...Clippard has distributors all over the place).
One last thing.....when you pick up the valve, make sure they give you a set of screw in nipples for the intake and outflows. They should come with it. To be on the safe side, take a piece of your air line with you to show the guy at the distributorship, for sizing.
Len
If not go here:http://www.clippard.com/store/search.asp?sku=&description1=needle+valves&andOr=and&description2=
If you look down the list you will see model MNV2. I use that one in two of my tanks and like it because it is adjusted by via screw driver which makes minute adjustments easier for me, and also makes it tougher to accidentally turn. However there are many other models with burl knobs for adjusting. I know many people use the KNV1KP.
Clippard, IMO makes the best and most reliable valves for our purposes.
Anyway, once you decide which one you want, look to the left on the page and click on distributors and find one close to you. If there is one nearby, you'll save on shipping costs. (acknowledgment to Bob Alston who clued me in to this feature...Clippard has distributors all over the place).
One last thing.....when you pick up the valve, make sure they give you a set of screw in nipples for the intake and outflows. They should come with it. To be on the safe side, take a piece of your air line with you to show the guy at the distributorship, for sizing.
Len
djlen,
Got the clippard mnv2 valve. You are right, this is the one to get and it was only 6 bucks. Thank you for the information. It is truly appreciated.
Got the clippard mnv2 valve. You are right, this is the one to get and it was only 6 bucks. Thank you for the information. It is truly appreciated.
Muskieswen
Sorry the info I posted above wasn't helpful to you in figuring out your problem.
Bob
Sorry the info I posted above wasn't helpful to you in figuring out your problem.
Bob