Pop-of valve PSI minimum?
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Pop-of valve PSI minimum?

  1. #1
    on 3 go..... Slow Burn's Avatar
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    Default Pop-of valve PSI minimum?

    At what psi do you guys refill your C02 bottles? What's the lowest psi the valve will still work at?

    Thanks

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    Senior Member Red Rocket's Avatar
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    you can run them down to 400 psi no problem

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    CANT RE MEMBER FARMER JOHN's Avatar
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    Gene, as long as you have more air pressure then intake pressure it will work, I've even pushed the valve closed by hand in a pinch to drive it in, you just don't want to build any intake pressure or it will open on its own, and i usually refill when it gets down to 500lbs, because it doesn't last long after that, in a emergency I've recharged with my NOS bottle, i don't know if that helped you or not, but thats all i got

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    It's a sickness Eliminator#1's Avatar
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    I fill to 800-1000 i fill with nitrogen, run down the valve to 100 psi, use it up!!, also you can pm john mills!
    LIFE'S GOOOOOOOOD!!!!!!!!!!
    QE 072


  7. #5
    on 3 go..... Slow Burn's Avatar
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    Thanks for the info guys. Look forward to seeing ya at the CP deal.

    FJ, your boat's looking insane.

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    B1 Racing cs19's Avatar
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    Quote Originally Posted by FARMER JOHN View Post
    as long as you have more air pressure then intake pressure it will work,
    What he said, except make sure its c02

    Your CP isnt making anywhere near 100 psi. inlet pressure so there you go.

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    It's a sickness Eliminator#1's Avatar
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    Quote Originally Posted by cs19 View Post
    What he said, except make sure its c02

    Your CP isnt making anywhere near 100 psi. inlet pressure so there you go.
    Chris why co2 only, nitrogen is not as cold and dryer
    LIFE'S GOOOOOOOOD!!!!!!!!!!
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    Senior Member Boat 405's Avatar
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    Typically when the bottle pressure drops below 853 psi. That is when you have run out of liquid in the bottle and now it is simply air pressure. Co2 becomes a liquid form at about 853 psi at 72 degrees. temperature will affect bottle pressure with co2. A cold bottle may only read 500 psi. A hot bottle could read 1100 psi. You cannot rely on bottle pressure to determine contents. When I fill my bottles. I write the empty weight on the bottle and then weigh it after. Generally it is hard to get all the air out to get a full fill with a simple transfer line.

    With a 2.5 lb bottle I can usually get about ten cycles with the valve.

    As far as the min pressure to operate the valve. I'd say around 100 psi. The surface area of the air piston is greater than the area of the water piston so you can get by with less air pressure than your suction piece pressure.
    Boat 405.

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    Quote Originally Posted by widowmaker View Post
    Typically when the bottle pressure drops below 853 psi. That is when you have run out of liquid in the bottle and now it is simply air pressure. Co2 becomes a liquid form at about 853 psi at 72 degrees. temperature will affect bottle pressure with co2. A cold bottle may only read 500 psi. A hot bottle could read 1100 psi. You cannot rely on bottle pressure to determine contents. When I fill my bottles. I write the empty weight on the bottle and then weigh it after. Generally it is hard to get all the air out to get a full fill with a simple transfer line.

    With a 2.5 lb bottle I can usually get about ten cycles with the valve.

    As far as the min pressure to operate the valve. I'd say around 100 psi. The surface area of the air piston is greater than the area of the water piston so you can get by with less air pressure than your suction piece pressure.
    Thanks k jell for the information. I was just curious if you could be more spot on. Really 853 psi before co2 becomes a liquid and @ 72 degrees. The guy is very impressed.

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    About 500' AGL MudPumper's Avatar
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    Quote Originally Posted by The Guy View Post
    Thanks k jell for the information. I was just curious if you could be more spot on. Really 853 psi before co2 becomes a liquid and @ 72 degrees. The guy is very impressed.
    No shit.....I just about fell out the chair. Thought I was reading a post by SleeperCP or some shit. Damn, Kjell.

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    B1 Racing cs19's Avatar
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    Quote Originally Posted by Eliminator#1 View Post
    Chris why co2 only, nitrogen is not as cold and dryer
    Never said only co2, just didnt want to see anyone trying to run it with compressed air.. Nitrogens fine too, its less corrosive Im told.
    Last edited by cs19; 07-24-2010 at 11:55 PM.

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    About 500' AGL MudPumper's Avatar
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    Quote Originally Posted by cs19 View Post
    its less corrosive Im told.
    This is true.

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    Quote Originally Posted by cs19 View Post
    Never said only co2, just didnt want to see anyone trying to run it with compressed air.. Nitrogens fine too, its less corrosive Im told.
    LIFE'S GOOOOOOOOD!!!!!!!!!!
    QE 072


  16. #14
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    Quote Originally Posted by The Guy View Post
    Thanks k jell for the information. I was just curious if you could be more spot on. Really 853 psi before co2 becomes a liquid and @ 72 degrees. The guy is very impressed.
    lol
    LIFE'S GOOOOOOOOD!!!!!!!!!!
    QE 072


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