Author	[Modern View]
Keith Molden 01-28-2013 05:37:08 167.239.222.80 Report to Moderator	I agree, but tend to dissagree with you. If you check, you will find every answer from 1/4 turn to 1 1/2 turns. The purpose of only opening the acetylene valve a short distance is so it can be closed with a twist of the wrist. When I was teaching welding it was 1/4 turn. We also taught that you never drained the acetylene pressure down all the way as it would let the acetone drain off possibly creating a void in the suspension material. The gas acetylene will become self explosive at 29.4 p.s.i. At least that's what we taught in the 70s & early 80s. things might have changed from then to now. Just my thoughts, Keith [Reply]   [No Email]
Stick welding 01-28-2013 10:57:35 198.53.25.107 Report to Moderator	Re: Oxygen Bottle Replacement in reply to Keith Molden, 01-28-2013 05:37:08   I said never open more than 1 1/2 turns but usually about 1/4 turn is enough. Somevalves have to be opened more though. [Reply]  [No Email]
Stick welding 01-28-2013 11:02:18 198.53.25.107 Report to Moderator	Re: Oxygen Bottle Replacement in reply to Stick welding, 01-28-2013 10:57:35   I should have added that unless you're using a rosebud, you usually get too small of flame before the acetone will leak. [Reply]  [No Email]
Leroy 01-28-2013 09:04:19 69.88.205.38 Report to Moderator	Re: Oxygen Bottle Replacement in reply to Keith Molden, 01-28-2013 05:37:08   When I bought my torch back in 1979 I was told to only open the A one full turn and the O full open. Also was told never run the A down to less than 25# because it would damage the cylinder. The O all it will do when it is run empty is the high heat will stop and just the A will keep on burning. Have had that a few times. Just used for farm repairs. [Reply]  [No Email]