See here:
http://www.oaklandsfestival.host56.com/web_documents/air information.pdf
Note this does not currently cover the subtlety of full aluminium cylinders legally being valid for 10 years (UKPSF published the hpa1 with the simple aluminium / steel 5 years, their website under law brings up 10 years)
There are different styles of filling stations, not many shown and I will publish with other examples one day. The principles are the same and you should check with the site for familiarisation before filling (and check you're allowed)
Generaly you can tell that a flat bottomed cylinder is 3000psi max, a curved bottom is probabky 4500psi but there are some that are 3000psi max
Check the labels and make sure you dont get confused with the 'failure pressure'
Sometimes people change over the regulator:
mix 3000 regulator on a 4500 cylinder and you've just made it 3000psi max (ok but people can easily choose the wrong fill and blow it)
Mix a 4500 regulattor on a 3000 cylinder and it might seem fine in theory to use 3000psi, but the burst disks will be meant for 4500 cylinders and you then lose the safety controls
http://www.oaklandsfestival.host56.com/web_documents/air information.pdf
Note this does not currently cover the subtlety of full aluminium cylinders legally being valid for 10 years (UKPSF published the hpa1 with the simple aluminium / steel 5 years, their website under law brings up 10 years)
There are different styles of filling stations, not many shown and I will publish with other examples one day. The principles are the same and you should check with the site for familiarisation before filling (and check you're allowed)
Generaly you can tell that a flat bottomed cylinder is 3000psi max, a curved bottom is probabky 4500psi but there are some that are 3000psi max
Check the labels and make sure you dont get confused with the 'failure pressure'
Sometimes people change over the regulator:
mix 3000 regulator on a 4500 cylinder and you've just made it 3000psi max (ok but people can easily choose the wrong fill and blow it)
Mix a 4500 regulattor on a 3000 cylinder and it might seem fine in theory to use 3000psi, but the burst disks will be meant for 4500 cylinders and you then lose the safety controls