smith proportional mixer

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I am just seeing if anyone on here run one. I got one and have a questionOn the back of it and the instructions says inlet pressure 50-100 psi.So do I need a psi regulator (like oxy.ace regulator) for my ar and co2, or do I need just a regulator flow meter regulator.So which regulator do I need?I have a co2 flow meter regulator, and ar flow meters, so will this work?
Reply:You have to use a "PSI" Regulator, NOT a "CFH" Flow Meter type. Using a Smith Series 30 or Harris 9200 on each tank, both set at the same PSI. I thought they were to be set at 110 PSI, not 100, but it has been a long time since I used one.Bretps... The mixers are made for specific gas combinations.Last edited by UA440Fitter; 10-26-2008 at 02:12 AM.Reason: Needed to add...Ranger 250 * Invertec V205-T * Invertec V275-S * Precision Tig 225 * Power Mig 300 w/ Python Push/Pull Pro-Cut 25 Plasma * Millermatic 150 * Hobart Handler 175 * Bernard 3060 Tig Cooler Everlast LG-80E Plasma Cutter * Henrob 2000
Reply:THANK YOU!!!The mixer I have is for Argon and CO2.On the side it says Max 100 PSI.So now all I need is a psi regulator for my bottle of ar and one for my co2 bottle.
Reply:Your welcome!You must have one of the older Smith/Tescom units. They were a 100 psi max unit. The newer Smith units want you to set inlet regulator pressure to 105 to 115 psi.Just set your % of Argon, and your CFH, and you're ready to fly!BretRanger 250 * Invertec V205-T * Invertec V275-S * Precision Tig 225 * Power Mig 300 w/ Python Push/Pull Pro-Cut 25 Plasma * Millermatic 150 * Hobart Handler 175 * Bernard 3060 Tig Cooler Everlast LG-80E Plasma Cutter * Henrob 2000
Reply:anyone know if I can get some oxygen regulators and just change out the fittings. My LWS said it would work and it is the cheapest route. They make Co2 psi regulators and ar ones but they said they would cost more and the oxygen would work just as good.
Reply:Originally Posted by ace4059anyone know if I can get some oxygen regulators and just change out the fittings. My LWS said it would work and it is the cheapest route. They make Co2 psi regulators and ar ones but they said they would cost more and the oxygen would work just as good.
Reply:Here is what I did to mine..http://weldingweb.com/vbb/showthread.php...ighlight=Mixer...zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:Ace,On my Smith 2 gas, proportional mixer, I used the Smith Series 30 Argon and CO2 regulators (not flowmeters).  This is to mix Argon/CO2.  I set my inlet pressure (as shown on the regulators) at 105psi.  The mixer itself serves as a flowmeter.As was mentioned, you're better off using regulators from the same manufacturer.  I got my Smith 30 Series Regulators from Cyberweld for about $75 ea.When I want to mix Argon/O2 (Mig Spray), I use the Smith regulator on my Ox/Ace setup.  This requires the use of a different proportion, of course, since the mixer is set up based on the square root of the specific gravity of the gases being mixed.Bottom line.  You've got a nice mixer.  Get yourself a set of good regulators to go with it.Syncro 250 DX Dynasty 200 DXMM 251 w/30A SG XMT 304 w/714 Feeder & Optima PulserHH187Dialarc 250 AC/DCHypertherm PM 1250Smith, Harris, Victor O/ASmith and Thermco Gas MixersAccess to a full fab shop with CNC Plasma, Water Jet, etc.