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Air tank, what size is the outlet valve?

Discussion in 'Anything Airgun Related' started by Fred_Bear, Mar 1, 2014.

  1. Fred_Bear

    Fred_Bear Well-Known Member

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    Location:
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    Hi

    I currently have a 7lt/300b tank in for a pressure test. I know that the filler probe I need to connect to the tank requires a 1/8" male fitting, but what is the size of the thread that connects to the tank outlet valve bit? I need to know so I can get an adaptor ready for it coming back from test, this is a photo of the tank in question.

    thanks

    dive1.jpg
     
  2. Ruddles

    Ruddles Engaging Member

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    Location:
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    Do you mean the thread in the pillar valve of the tank? It's 5/8" BSP.

    See http://www.nigelhewitt.co.uk/diving/din.html. Nigel Hewitt = Combro.

    Edited: sorry, I misunderstood. You don't have a scuba-type (DIN) pillar valve. Ignore me!
     
    Last edited: Mar 1, 2014
  3. secretagentmole

    secretagentmole Low down, dirty and quiet...

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  4. Fred_Bear

    Fred_Bear Well-Known Member

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    Thats great thanks, have ordered one along with a male to male 1/8" adaptor.
     
  5. secretagentmole

    secretagentmole Low down, dirty and quiet...

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    Whoa what? You should have what you need there. Most fill adaptors have a male end that screws into the whip line, the whip line screws onto the DIN adaptor, which screws into the air bottle....
     
  6. Fred_Bear

    Fred_Bear Well-Known Member

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    Oh bum, last haste more speed! The extra bit only added £2 so not too bad. Thanks for letting me know, I am a PCP virgin!
     
  7. secretagentmole

    secretagentmole Low down, dirty and quiet...

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    Thats ok if you ask nicely they might refund you! Just make sure when you do everything up you use a couple of screwdrivers and nip it together nice and tight. Air at 200 bar will find a lot of places to escape from unless you have done it up tight!
     
  8. 18 Wheeler

    18 Wheeler Busy Member

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    You'll struggle using screwdrivers. Spanners perhaps? :p

    DIN fittings shouldn't need much more than finger tight + 1/4 turn, and increase by 1/8th turn if there is still some leak (there shouldn't be with good quality fittings). Overdoing it may crush the seal and cause leaks, in extreme cases even the threads can be damaged.
     
  9. Ruddles

    Ruddles Engaging Member

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    In that case be aware that when the filling whip is pressurised, it will be difficult to disconnect. Always bleed the pressure out before disconnecting it. In the photo you posted, the bleed valve appears to be on the right: close it before opening the tank valve to fill the gun and open it again before trying to disconnect the whip.
     
  10. secretagentmole

    secretagentmole Low down, dirty and quiet...

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    Screwdrivers are talented! I am using imperial Irish screwdrivers!
     

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