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Hpa Tank Pressure Question

Discussion in 'Technical' started by dh131286, Oct 9, 2019 at 12:10 PM.

  1. dh131286

    dh131286 Engaging Member

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    If you running a hpa conversion, 3000psi bottle regged down to 850psi. At what pressure would the tank be 'empty'

    Am I right in thinking that once the tank pressure gets down to 850psi then that is classed as 'empty'.

    Edit:Sorry I should have worded my original question correctly. I meant in terms of needing to refill.
    Thanks. Dan
     
    Last edited: Oct 10, 2019 at 8:28 AM
  2. RichieRich

    RichieRich Pew Pew

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    Yep :thumb:

    Well, not empty, but to the point it will need refilling :)
     
    dh131286 likes this.
  3. Strathrpc

    Strathrpc Posting Addict

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    Empty is when the tank is at atmospheric pressure.
     
    dh131286 and robs5230 like this.
  4. robs5230

    robs5230 леший

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    As 850 PSI is teh reg pressure, efficiency will drop if shot under reg pressure so as above, should be refilled for shooting.

    But just for safety purposes- the cylinder will still contain 850 PSI so very much still under pressure.
     
    dh131286 likes this.
  5. dh131286

    dh131286 Engaging Member

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    Thanks guys. Just wanted to know what the lowest I can have the bottle at before it needs filling when the reg is set for 850psi. But as you have said, it's what I believed it would be.
     
  6. dh131286

    dh131286 Engaging Member

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    Sorry I should have worded my original question correctly. I meant in terms of needing to refill.
    Thanks. Dan
     
  7. sharpsman

    sharpsman Posting Addict

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    In theory the tank is empty when it has no air in it at all but it will stop topping your gun when the pressure in the bottle is the same as the gun ie equal pressure.
     
    Radlad likes this.
  8. Strathrpc

    Strathrpc Posting Addict

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    In theory, if there was no air in the tank then it would have a vacuum unless you'd put some other gas in there!?! When the air inside the tank has depleted to atmospheric pressure then it's effectively empty.
     
  9. markturver

    markturver Well-Known Member

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    Pendants. THE reason I leave forums.
    Can't you simply try to answer the O.Ps question?
    Yes he didn't frame his question very clearly.
    850 p.s.i. - that is the pressure your bottle comes 'off the reg' (regulator opens and is no longer 'metering' the air supply) AND the pressure you need to refill (top it up, for the pedants) in your case.


    .
     
    Bruno27, dh131286 and RichieRich like this.
  10. sagalout

    sagalout Stoptober failed!

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    I don't think you meant "pendant" did you? :p
     
  11. Strathrpc

    Strathrpc Posting Addict

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    I'll hang around for a while!;)
     
    Bunny-on-Bunny and sagalout like this.

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