Advice on bottle pressures ?

[PSweeney]

Trying to compare deals and I need to understand the bottle pressure versus volume.

I rent a bottle from WeldAir, £60 rental for 3 years, £37 per refill, 20L bottle at 137bar. Am I right that the quoted volume in litres should be multiplied by bottle pressure in bar ? ie ;

20 x 137 = 2740 ?

If a same size 20L bottle can be filled to 200bar, this would give me 4000 right ?? or not ?

 

[shenion]

Yes, vol = size X #bar.

 

[Jim Davey]

Makes the Albee cylinders pretty competitive by my calculations. No rent means you keep it as long as you want and never see a rental bill, downside is the lump sum up front, works out cheaper in the long run though.

 

[PSweeney]

thanks.

I did look at the Albee bottles but at 11L, even at 200 bar they work out less volume.