Pneumatic Relief Valves

[blazerbotics]

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.

[simon]

any chance you could get the data sheet Lee ? Might be worth running them past the FRA first, just in case.

[simon]

Alan
Might be worth asking about that one

[ukrobotics]

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

[blazerbotics]

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!

[tunna]

I think its 17 degrees rise in temp causes a 1 psi rise in pressure (Boyles law)

[woody]

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.

[simon]

Thanks Woody, e-mails sent