Gas cylinder question

  1. Leetus New Member

    Messages:
    3
    Location:
    Denmark
    Hi,
    I've decided to switch from flux wire to gas (82/12) argon/co2.
    Big difference, and very happy I made the switch. My question is, what do I need to disconnect after each use? The regulator, the gas hose or everything? Or will it be okay just to turn the gas off from the cylinder valve and leave everything connected?
    Sorry if this might seem like a dumb question, I'm fairly new to welding.
     
  2. Hopefuldave Intergalactic pot-mender

    Messages:
    1,137
    Location:
    The Shed of Danger, surrey, England
    My mig (only a cheapie with disposable bottle) had been sat in the storage at the pub my boy works in since before he started working there (5 years?) and came my way during a clear out - the bottle still had gas in it, still connected...

    Dave H. (the other one)
     
  3. Lazurus

    Lazurus Member

    Messages:
    638
    Location:
    Norfolk uk
    I turn off the bottle and wire feed then bleed any pressure left in the system by pressing trigger. The just purge the air out when I use again, main thing is to turn the bottle off, that way if you have any leaks at least you wont fill the shop with expensive gas you cant sweep back in the bottle.
     
  4. Pete.

    Pete. Member

    Messages:
    8,656
    Location:
    Kent, UK
    Start - bottle on. Finish - bottle off.
     
  5. Craig-SM

    Craig-SM Member

    Messages:
    629
    Location:
    Leeds
    Same as Lazurus. Bottle valve closed, light press conference of the trigger on my Clarke welder purges the gas. The regulator is left alone so I should have the same flow rate next time I use it. When I go to reuse it, bottle valve open and light squeeze of the trigger gets the gas flowing again.
     
    BarrieJ and Lazurus like this.
  6. Pigeon_Droppings2 Member

    Messages:
    2,166
    Location:
    london
    How many times have I spent an age prepping everything....pulled the trigger...only to realise that I haven't turned the gas on.

    It's worse when you leave gas in the machine....the weld starts off OK then it all goes wrong....even more confusing :doh:
     
    123hotchef likes this.
  7. Shedendman

    Shedendman Member

    Messages:
    3,805
    east sussex
    Gas off at bottle,de-purge welder,back off reg
     
    slim_boy_fat and backpurge like this.
  8. Pigeon_Droppings2 Member

    Messages:
    2,166
    Location:
    london
    In my garage the procedure is...finish welding...leave gas on...get cleaned up....go to bed...remember gas has been left on....hobble down to garage at midnight swearing at myself!
     
    Nick DV, Dcal, 123hotchef and 3 others like this.
  9. frank horton

    frank horton V twins are great but 4"s rule.........

    Messages:
    1,451
    Location:
    Soon 2 B Crete
    Can’t remember how many times I’ve left my elec bicycle on charge.....
    Wake up at 3am.....to go turn it off....
    At least my w/shop is by the house....
    Won’t trust chargers, Chineseum an all that....
    Mind the dogs like me going downs stairs early....hahaha...
     
    123hotchef likes this.
  10. RonA

    RonA specialist in repairing sealed for life equipment

    Messages:
    1,414
    Location:
    Stockton on Tees, UK
    As Lazurus just turn off my CO2 bottle when finished welding with my elderly Cebora130. Often amazed that the gas trapped between bottle & manual gas control valve in torch doesn’t leak away & before anybody suggests the bottle might be leaking have confirmed it isn’t by occasionally depressing it to make sure.
    RonA
     
  11. Hitch

    Hitch Moderator Staff Member

    Messages:
    11,993
    Somerset
    Good practice is to turn the cylinder off, drain the gas in the hose by pressing the trigger, then back off the regulator.

    In reality though it's cylinder off, and leave it.
     
    BarrieJ likes this.
  12. KemppiFrog Member

    Messages:
    3,054
    Location:
    Aquitaine
    Yes, me too.
     
  13. 123hotchef Member

    Messages:
    8,468
    Location:
    Kent
    mine is usually the compressor kicking in at 3am!
     
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