Mig Welder Gas Pressure

   / Mig Welder Gas Pressure #11  
I turn off the valve on the tank when I'm not welding. I think my Hobart leaks a little gas when not in use based on my experience. If I'm not welding, the valve is closed. Hope this helps,

Kurt
 
   / Mig Welder Gas Pressure #12  
Vin,
Does more gas pressure give greater weld penetration?
 
   / Mig Welder Gas Pressure #13  
<font color="blue">Does more gas pressure give greater weld penetration? </font>
John, no i don't beleive so, But different gases and gas mixes do. an example of this is straight argon gives little penetration but you get a very clean weld (little spatter) is great for very thin plate 2 mm or less. but not suitable at all for heaver plate.
where CO2 is cheap for say welding heavy plate good heat good penertration but very dirty lots of spatter.
 
   / Mig Welder Gas Pressure #14  
around here they will take your old tank in on trade for a larger tank and give you dollar for dollar for what you paid for it. so shouldn't be any money lost. /forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif
 

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