The right kind of needle valve? - The Planted Tank Forum
 
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post #1 of 14 (permalink) Old 05-18-2004, 02:39 AM Thread Starter
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I'm looking into getting a pressurized system and did a seach on ebay. Came across this needle valve Question: Is this what I'm looking for? Along with the results I got alot of automotive needle valves, so I don't know if this one is for CO2 tanks and can be hooked up to regulators.

If not, can someone give me a picture of the proper type of needle valve?
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post #2 of 14 (permalink) Old 05-18-2004, 03:01 AM
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Quote:
Originally Posted by Rolo
I'm looking into getting a pressurized system and did a seach on ebay. Came across this needle valve Question: Is this what I'm looking for? Along with the results I got alot of automotive needle valves, so I don't know if this one is for CO2 tanks and can be hooked up to regulators.

If not, can someone give me a picture of the proper type of needle valve?
Rolo,

Check this out http://www.thekrib.com/Plants/CO2/solenoid.html which should prove useful.....

jason

120g, Flourite & Sand. DIY Stand and Canopy. CF lighting 3wpg, Pressurized C02, DIY reactor. 2-XP3's, 500watt heater.
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post #3 of 14 (permalink) Old 05-18-2004, 04:22 AM
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Take a look at my web site. I have a summary of various needle & metering valves from Excellent ones to servicable ones such as the Clippard MNV-4k2 which I and many others use.
Parker makes some very high quality valves - as per the info in my web site; but they also make ones not useful for us.

http://members.cox.net/tulsaalstons/...Pressure%20CO2

Bob
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post #4 of 14 (permalink) Old 05-18-2004, 05:37 AM
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does the clippard needlevalve have to be modified to work or anything???
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post #5 of 14 (permalink) Old 05-18-2004, 11:46 AM Thread Starter
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Thanks for the link Bob! Helps alot!
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post #6 of 14 (permalink) Old 05-18-2004, 01:11 PM
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I use a swaglok valve (the BSS-4 with the best seals special ordered $58.00, with a fancy vernier handle + $14.00), but it is expensive. The clippards look like a good value, I'm going to investigate them next.

Sean

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post #7 of 14 (permalink) Old 05-19-2004, 01:04 AM
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Quote:
Originally Posted by FobbyBobby
does the clippard needlevalve have to be modified to work or anything???
i bought my clippard from robert at aquabotanic. it came complete with an 10-32 adaptor fitting. i've read that these fittings are nearly impossible to come by unless you order from robert or from clippard directly.

to simplify things i took the needle valve and the fitting into a home brew store and said: I'll buy one of your co2 tanks and a regulator if you can fit this needle valve onto it.

of course you might save yourself some hassle if you just went right to marc's website (aquatic-store.com) and order a package deal. i'm sorry i didn't.
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post #8 of 14 (permalink) Old 05-19-2004, 04:14 AM
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Yes the Clippard MNV-4kw needs some adapters to connect directly to a regulator. Some people, like apparently Robert and others, sell the Clippard with one of the adapters, a 10/32 to 1/8 NPT. That is what I got when I bought mine. You then need a 1/8 to 1/4 NPT adapter. This info is found in my web site.

The swagelok B-SS4 is a great valve. Expensive relative to the Clippard but gives much finer/easier adjustment. However, once the clippard is set, you can forget it. I have only changed mine once since setting it. I don't even have to deal with it when I refill the tank.

Bob
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post #9 of 14 (permalink) Old 05-19-2004, 12:44 PM
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Quote:
Originally Posted by bobalston
Yes the Clippard MNV-4kw needs some adapters to connect directly to a regulator. Some people, like apparently Robert and others, sell the Clippard with one of the adapters, a 10/32 to 1/8 NPT. That is what I got when I bought mine. You then need a 1/8 to 1/4 NPT adapter. This info is found in my web site.

The swagelok B-SS4 is a great valve. Expensive relative to the Clippard but gives much finer/easier adjustment. However, once the clippard is set, you can forget it. I have only changed mine once since setting it. I don't even have to deal with it when I refill the tank.

Bob
I never have to touch my swagelok valves unless I want to change a bubble rate. They hold their setting through a canister change (which isn't very often since I have two 20#'ers) but I do agree, and stated before, they are expensive. But since my substrate only costs me $10 a tank, I get to buy nice needlevalves.

I might have to check out the hex manifold someone is selling too.

Sean

Aquascape? I'm a crypt farmer.

It's a fine line between fishing and standing on the shore looking like an idiot.

That IS an aquascape, it's titled "The Vacant Lot".
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post #10 of 14 (permalink) Old 05-19-2004, 03:57 PM
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Rolo, that valve pictured on eBay is great except that it is a SOCKET WELD valve meaning that it has little counterbores at inlet and outlet designed for slip-fit insertion of stainless steel tubing and back-welding to effect a seal. NOT a good choice unless you are adept at TIG welding. It's also ½" tube size when ¼" is what is (likley) needed.

Derek

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post #11 of 14 (permalink) Old 08-31-2004, 02:09 PM Thread Starter
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This post is going in and new direction, forget about what I was saying about the other parker needle valve.

I found a local distributer who can order the MNV-4K2 clippard valve. I guess a special adapter is needed and asked him if it comes with one...he said no. So what adapter do I need, where can I find it, and about how much? I'm not going to order until I know I can use it.

Someone was talking about a 10/32 to 1/8 NPT. Then I have to get a second adapter, the 1/8 to 1/4 NPT. Could anyone explain these?

BTW I must order at least 2 valves. Keep your eyes peeled cause 1 might be for sale.
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post #12 of 14 (permalink) Old 09-01-2004, 01:27 AM
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The Clippard needle valve has 10-32 threads. Most regulators either have 1/8" or 1/4" NPT sized holes where you want to mount the needle valve. Order the 10-32 to 1/8" needle valve from the same place you order the needle valve. Then if you need the 1/8" to 1/4" adapter you can get it at most any Home Depot or Lowe's.

Or you could save yourself a ton of trouble and just order the needle valve with adapter from Aquabotanic.com or any of several other outlets.
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post #13 of 14 (permalink) Old 09-01-2004, 03:20 AM Thread Starter
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Thanks Rex, that all makes sense now.

Just another quick question. Where on the needle valve does the hose attach to? In the picture there is no threaded nipple.
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post #14 of 14 (permalink) Old 09-01-2004, 01:34 PM
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You also need to buy the nipple. I forget about that as my local distributor carries them in stock with the nipple attached.
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