Thanks Tom, some more question you can maybe help with?
If there is a bit of dirt in the regulator is that a major problem or an easy fix?
Do you happen to have a rough idea of costs to have it cleaned/serviced?
Any other reason that could cause the burst disk to fail?
It depends on the regulator. There are a couple that are 'user serviceable'
Check out the manufacturers website/youtube for guidance
I couldn't say on costs, if you can get to an event etc then you can show it to the tech guys - gun techs will not realy want to be involved in dealing with the regulator though
There are two burst disks - high and low pressure
The low pressure is further up the regulator and protects your gun from the regulator failing. If this has blown then there is a definate problem that needs a fix
The high pressure burst disk is at the start of the regulator and protects both the regulator from too much input and you & the bottle from a potential explosion. This is caused by far too much pressure in the bottle
A fibre wrapped bottle should be filled at up to 4500psi (some 5000psi, but no fills are available) they can cope with much more before exploding, and the burst pressure is very high.
You should not have been able to over fill at a pressure to blow the high pressure burst disk on a 4500 bottle
If it blew then something is wrong, or the burst disk is so old it just gave up
On a 3000psi bottle the high pressure burst disk is still way too high for you to blow it due to pressure - unless you filled on a 4500 fill station
The only case that I would be happy about just replacing the hp burst disk is if I filled a 3000psi on a 4500psi fill station. (Personaly Id still rather get the regulator checked out)