Smith Dual Stage Oxygen Regulator

32Bit_Fish said:

CGA 320 outlet valve?

Something like this?

http://www.alibaba.com/showroom/co2-valve-cga320.html

Click to expand...

Negative. You'll need to use a big pipe wrench and thread out the nut/nipple that's in the O2 regulator and thread this part into it, on the "high side inlet"
Amazon perma link: http://amzn.com/B002BXZNRO


http://ecx.images-amazon.com/images/I/31ybf3OURQL._AA300_.jpg


Just a little FYI, to keep people from blowing themselves up or blowing regulators up, different gasses have different CGA nut/nipples. Flammable gasses have one style CGA, inert gasses have another, breathing gas uses another, oxygen uses another, C02 yet another, etc. Regulators aren't usually interchangeable between different gasses so to use an O2 regulator on a CO2 tank will take a little bit of work.

(Gasses with similar properties are sometimes interchangeable; for example argon and nitrogen use the same CGA nut/nipple because they are both non flammable inert gasses and filled to similar pressures: 2600PSI).

This is a long winded way of saying, just stick with a rig intended to be used with CO2: that will spare you a lot of hassle. I enjoyed building my regulator, but unless you're pretty handy, I wouldn't mess with re-purposing regs from one gas to another.
Here's what I built: EOTD worry warts: Meet your God! LOL @ DIY Regulator


http://www.plantedtank.net/forums/pHosting/f/9113_EOTD3c.jpg

Standard CO2 high side pressure ratings on gauges are 3000 to 4000. The saftey blow off or burst disc for Co2 tanks are rated well over 1000 so having a correct gauge to go over that is good to have on the high side. Ive seen peoples set up register as high as 1500 to 1800 psi. you would never know that on a 1000 psi gauge as it would be pegged.

To be quite honest.. low side is the more important for our use as long as your using a high side of 3k-4k. Regulators that will do up to 200 psi are about the max spectrum of the range you want to use with the ones that have a working pressure/low side up to 100 are preferred. But if not using an atomizer you can use a set up that has a low side of up to 30 psi.

And there is nothing wrong with building a BETTER rig then any of the pre made stuff out there. if you want budget fine.. but if you want something to last and actually learn something about your Co2 set up then id highly recommend building your own.

and if your spending $20 on a CGA320 nut and nipple your paying to much.

proaudio55 said:

Yep, that's a pretty high end regulator and would work fine. Only 2 issues I can see:
#1. The pressure gauge is a bit high: 0-4000PSI. CO2 shouldn't ever go above 1000PSI
#2. The CGA nut/nipple is wrong. You'll need a replacement CGA 320, that'll add an extra 20 bucks to the price tag.

Unless you can get this second-hand and really cheap, I'd go with something intended for aquarium use.

CGA 320 nut & nipple, regulator side:

Click to expand...

Are you wanting the parts to build a regulator assembly? This is one way of many to build a post body kit.

1/4" NPT x 1/8" NPT bushing
1/8" NPT regular nipple or hex nipple
female 1/8" NPT x male 1/8" NPT elbow
female 1/8" NPT solenoid (Burkert 6011)
1/8" NPT regular nipple or hex nipple
female 1/8" NPT needle valve (Ideal or Fabco)
male 1/8" NPT check valve with either 1/3, 1/2 or 1 psi cracking pressure
female 1/8" NPT bubble counter

CGA-320 nipple and nut
1/4" OD x 1/8" ID polyurethane or Tygon Lab tubing
bubble counter solution
drop checker
4 dKH solution
CO2 tank

You are looking at the parts needed to assemble a post body kit. There are many ways to build it using a different fittings selection.

I don't know the cost. Some of the choices of parts used are more expensive than others. Like:

• ADA drop checker verses GLA model verses cheapies
• Burkert solenoid verses a Parker solenoid verses a Clippard Mouse solenoid
• Swagelok metering valve verses Ideal needle valve verses Fabco needle valve verses Clippard needle valve
• ADA bubble counter verses GLA model verses JBJ knockoff

The fittings aren't too variable. You can get them from Lowes, Home Depot, Swagelok, Parker, Grainger, etc. You've priced the 5 lbs CO2 tanks.