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14 pin connector

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  • 14 pin connector

    I am trying to figure out what to use for a gas valve on my little miller inverter cst280. I have had it for about a year now, and I just emptied my third bottle of argon to atmosphere because I was stupid enough to forget to turn off the valve on the tig torch head... My question: is there an output on the 14 pin connector that I could rig a solenoid valve to to turn my gas on and off? I realize that I would have no post flow gas, but I think that I can use a timed relay for that. Any suggestions would be appreciated. Thanks.

  • #2
    I just happened to think about my Dynasty sitting in the shop back home. Haven't seen it in a few months, but I'm sure the bottle is on, and the machine is plugged in, as I always forget to close the shop up correctly. I suppose I should call my sister and have her help me out, wait, she might actually burn that bottle of argon up playing with my nice shop toy, lol.

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    • #3
      Originally posted by james_martin_50 View Post
      I am trying to figure out what to use for a gas valve on my little miller inverter cst280. I have had it for about a year now, and I just emptied my third bottle of argon to atmosphere because I was stupid enough to forget to turn off the valve on the tig torch head... My question: is there an output on the 14 pin connector that I could rig a solenoid valve to to turn my gas on and off? I realize that I would have no post flow gas, but I think that I can use a timed relay for that. Any suggestions would be appreciated. Thanks.
      I don't know about your welder, so I'm no help there. I have a hand full of bottles and an air compressor in my shop. When I turn any of them on, I try to remember to turn on a little night light I have plugged into the wall. When I'm shutting down the shop and I've turned off all the lights and I'm about to shut the door, I notice the little night light. That is enough to remind me that I have a bottle with an open valve.

      If that doesn't remind me of the open bottle, I just go around and check them all.

      All I can say is that it's cheap and if you remember to turn it on, it works pretty well.

      Comment


      • #4
        saving argon

        Hi james_martin_50,

        I have done the same thing and I have a 336 cu ft tank of argon so it gets expensive.

        After I wasted a full tank, I did a little experiment to see how much leakage there was in my run from the tank to the Dynasty.

        I have an Airco (Concoa) 806-9474 regulator-flowmeter with a "Y" fitting feeding 2 hoses.

        If I need to back purge, I use the A hose and the B hose. Otherwise, I use the B hose which is connected to the Dynasty.

        Both A and B hoses have a shut-off valve built into the "Y" so I close the A valve
        when I am tigging without back purging.

        After my dumb mistake, here is what I did to see where the leakage was.

        1 - I closed both A and B valves and then closed the cylinder valve.
        (Approx 2200 PSI showing on the gauge.)

        2 - Then I backed out the regulator-flowmeter adjustment handle fully and watched the gauge. Took about 6 minutes to drop to zero.

        So even with the 2 valves closed, and in theory no gas could pass, I still had some leakage.
        I am guessing this loss is thru the diaphrams in the regulator-flowmeter.
        So there appears to be a "leak" even with the valves closed.

        (2 questions for those using helium - since helium is a smaller molecule, are the diaphrams in the helium regulators made from a "tighter" material?

        Have you noticed this leakage problem?)

        My suggestion (and what I do now) like jworman"s system is to use a reminder device.

        I got a couple of battery powered LED bicycle flashers from my local dollar store.

        Keep one on top of the argon tank valve. When I need to tig, I turn on the flasher.
        Hard to miss when I shut down.

        If you really want to install a solenoid valve, I would put it "upstream" of the regulator and it could get expensive finding one rated for 2600 psi.

        good luck

        Comment


        • #5
          C'mon boys... For a welder, forgetting to turn your gas off at the end of the day is like forgetting to wipe your *ss after you poop.

          Having said that, the best way to avoid a potentially expensive (not to mention embarrasing) mistake is to soap test all of your fittings after you install a new bottle.

          As for forgetting to turn the gas valve off at the torch-- you would think that the "hissing" sound would be a gentle reminder....

          Comment

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