Get a grip here will ya? All this stuff is like car battery's! Simple made by one or couple more then sold with "slapping there label on". China is China....and owns us. At least its getting better.
I had a electrician in my shop when built. 240 line with two outlets, one weld bench, one big door for outside work.Only one used at a time, so no biggie me.
When done, tanks shut off, regulators (screw handle) loosened and drain the hoses at the torch. Don't leave regulator diaphragms under pressure........