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I have been to my local supplier he told me that they no longer sell the ones i have they have to be fitted with a pipe to stop them freezing up he can get them made for me 2 to 3 weeks around £70 each but might be abble to get them cheaper if i need more than one
are 1000psi burst discs available, if so would these be acceptable? I assume theyre cheaper, and i know they arent as pratical as valves, but seeing as the valves are hard to get hold of and i understand what paul is saying about buying a batch.
but it may be another alternative.
any chance you could get the data sheet Lee ? Might be worth running them past the FRA first, just in case.
Alan
Might be worth asking about that one
I can ask him he just told me these are the ones they have to use now
i like the burst disk idea
I was wondering about 1000psi burst discs the other day. Theoretically it should be ok, but you do risk loosing all your gas on a hot day whereas with a relief valve it just dumps enough gas for the pressure to drop to below 1000psi.
Somthing like a 1200psi burst disc would probably be more useable but that would mean a change in the gas pressure rules which I imagine is very unlikley to happen.
Alan: I assume your burst disc idea is to have one inline with the pneumatic system like the relief valve and not replacing the one on the bottle ?
Dominic
http://www.ukrobotics.comhttp://www.ukrobotics.com
yeah, just takes the place of the PRD and leave the disc on the bottle, as you dont want it blowing when you leave your co2 tank in the car!
I think its 17 degrees rise in temp causes a 1 psi rise in pressure (Boyles law)
http://www.flowstar.co.uk/http://www.flowstar.co.uk/
Flowstar Ni Relief Valve Type 5.3 & 5.2
Totally enclosed right angle safety valve. Type 5.3 with brass body / soft seat. Type 5.2 with stainless steel body/soft seat. SIZE RANGES: ¼€ BSP inlet x 3/8€ BSP outlet 3/8€ BSP inlet x 3/8€ BSP outlet ¼€ NPT inlet x 3/8 BSP outlet (5.2 only) SET PRESSURE RANGES: Type 5.3 0.5 to 120 BAR (G) Type 5.2 0.4 to 200 BAR (G). SEAT MATERIAL: Standard Viton (options from EPDM Kalrez) (In future as overflow valve ACC to Ce-certification, directive 97/23/EC ped).
http://www.dabengineering.com/burst_disc_assy.htmhttp://www.dabengineering.com/burst_disc_assy.htm
The above seems like a small company and may well be willing / able to supply a lower rating burst disc.
Thanks Woody, e-mails sent :)