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Filling 4500 psi air tank with a 3000 psi reserve tank

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hENy

hENy

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May 13, 2024
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I'm looking to ensure there's no way to drive the pressure gradient up between a scuba tank and the working air tank for a PCP.

If the scuba tank takes 4500 psi, great. What if it only takes 3000 psi?

Can I then transfer 4500 psi to my working air tank somehow? Or would I max out at 3000 psi after the transfer?

I'm hoping there's some kind of device that can push up the pressure.

Thanks.
 
LDP said:
You cant fill a tank to a higher pressure than the tank being used to fill it. If the fill tank has 3,000 psi in it you are only going to get 3,000 psi max into the tank being filled.
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No, actually what will happen is the two tanks will equalize in pressure. To fill a tank to 4500 psi, you need a source higher than 4500 psi, or a compressor.
 
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SteveV said:
No, actually what will happen is the two tanks will equalize in pressure. To fill a tank to 4500 psi, you need a source higher than 4500 psi, or a compressor.
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And worth reminding: if you hook up a tank at 4500 psi to another at 3000 psi, the 3000 psi tank will end up over pressure. The amount of over pressure depends on the relative size of the two tanks.
 
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hENy said:
I'm looking to ensure there's no way to drive the pressure gradient up between a scuba tank and the working air tank for a PCP.

If the scuba tank takes 4500 psi, great. What if it only takes 3000 psi?

Can I then transfer 4500 psi to my working air tank somehow? Or would I max out at 3000 psi after the transfer?

I'm hoping there's some kind of device that can push up the pressure.

Thanks.
Click to expand...
I know you're new here, but you need to learn the difference between SCUBA and SCBA.

Hint: It's a HUGE DIFFERENCE!!!
 
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