ARCCAPTAIN Nitrogen Regulator with 6.6FT Hose, 0-600 PSI Delivery Pressure, 1/4'' Male Flare Outlet Connection and CGA580 Inlet Connection Gauges

This is a solid Nitrogen Regulator set. I used it to pressure test a new mini-split install, and it preformed well with no leaks. If you haven't used a regulator before, the directions with this unit will likely confuse you. Once the regulator set is connected to the nitrogen bottle, UNSCREW the regulator handle a few turns (i.e., turn it counter-clockwise) to reduce/limit the output pressure, then SLOWLY open the valve on the nitrogen bottle to check the output pressure. The first gauge will measure the pressure inside the nitrogen bottle, and the second gauge indicates the pressure at which the nitrogen will be entering the mini-split line (the output pressure). I point this out because one would naturally think that TIGHTENING (clockwise turning) the regulator handle will reduce or turn off the output pressure...but if you do that, the opposite will happen...the nitrogen could be released into the mini-split system at full (extremely high) pressure and blow something. Next, with the nitrogen bottle's valve open, slowly turn the regulator handle until it shows the output pressure at a level no higher than what the mini-split's specs shows it is designed to handle (usually no greater than 500 psi). Once you have the output pressure correctly set, only THEN do you slowly open the shut-off valve that you should have connected between the nitrogen output hose and the mini-split's service port.

Working fine for my gas welding.

Does what is expected. No leaks. The only reason I give it 4 instead of 5 is that it is rated for up to 450 psi output not 600 as it says. The gage goes up to 600. On the other hand I have no reason to go up to even 450 psi.

This does what it's supposed to do without leaking. I'm using this to flow nitrogen while brazing copper lines and to pressure test HVAC linesets. For brazing, I do attach a separate flow meter but just because I already had it. I could use this on its own. It runs the pressure range I need and was priced right. When pressure testing, it did read accurately from my digital manifold. It feels good in the hand; it's well made. The hose that it came with was good quality and also leak free. Great gauge.

I’m no pro, but I’ve been welding with acetylene welding gear since high school. FYI, that’s been a very long time ago… I am also a scuba diver, so I’ve been around high-pressure tanks for just as long. I’ve used Matheson medical regulators to Montgomery Wards and Sears. This regulator is no Matheson, but then it doesn’t cost a thousand dollars either. I don’t think you can beat this for the money. Its machining isn’t up to medical standards but still very good. It functions as well as any of my other regulators and it just works~!~ I contacted the manufacturer and they were very responsive to my queries, I wanted their thoughts on using this with other ‘Non-Corrosive’ gases such as Argon. I’ve read that some folks use Nitrogen for TIG welding… Not a good idea. Next, I checked with our local Airgas supplier and they checked it out and said it would work fine on my Argon tanks also. So, there’s a dual use for you. For the geeks out there, a 125 cu/foot Argon tank is nominally filled to 200 bar, which is a bit less than 2900 lbs, so you're well within the gauge ratings as far as pressure goes. Over all, its good high-pressure regulator, from 3000 lbs. high pressure, up to 600 lbs. low side. I didn’t film hooking it up to a tank out in the shop, but it worked great on both Nitrogen and Argon tanks. I use Argon for my shield gas during TIG welding because it is more inert. However, it is used in certain situations with copper but I’m unfamiliar with that. In closing, although this is labeled Nitrogen, it works fine with Argon too. Remember, Argon (Ar) is completely inert, so it won’t harm any other metal. So go forth and make something ~!~

Works great!

Worked great for purging AC system, and the long hose worked well.

Just got the chance to pressure test an AC system with nitrogen gas at 300 psi. Held the pressure without creeping up. It is a well made unit