A check valve 10 is provided in feed line 1 to prevent the return flow of inert gas which has been contaminated by {HEAD ~ magnesium} in {TAIL ~ the casting furnace} 
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A check valve 10 is provided in feed line 1 to prevent the return flow of inert gas which has been contaminated by { HEAD ~ magnesium } in { TAIL ~ the casting furnace }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL