Originally Posted by tech69
congrats on your purchase! I hope my post made you feel it was a right call, or not depending on what one you ordered. The one with the 8 second post flow is the 200 DC (cheaper version) and the one that welds aluminum is the 200 AC/DC. I hope you ordered the AC/DC. You can control the post flow with a knob on the AC/DC. Please tell me you got that one! If not, halt your order. You may not like how it burns argon up.
I suspect you are right if it flows for 8 seconds. I wonder if the current production ones flow that long. I did indeed order the cheaper DC unit.