burst disk material
it seems that most guys use HDPE for burst disks, what pressure do these burst at? i have been using metal tape on my gun(havn't had a sucessful hybrid shot yet, only pnumatic testing) it is a thin plastic like tape and bursts around 100psi in a 3/4" black iron union with the tapered part facing the barrel. what other materials work well for holding high pressures.
- Pete Zaria
- Corporal 5
- Posts: 954
- Joined: Fri Mar 31, 2006 6:04 pm
- Location: Near Seattle, WA
I don't have a hybrid, but have studied them quite a bit (I hope to build one next year, funding dependant). Most people use several layers of aluminum foil, or discs cut out of a milkjug or soda bottle. Any hard, thin plastic should work. Hope that was kind of helpful.
Peace,
Pete Zaria.
Peace,
Pete Zaria.
- boilingleadbath
- Staff Sergeant 2
- Posts: 1635
- Joined: Sat Mar 12, 2005 10:35 pm
- Location: Pennsylvania, USA
No numbers regarding steel unions, but PET (2 Liter bottle thickness) typicaly slips out of plastic unions at around 100 PSI.
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- Staff Sergeant 3
- Posts: 1762
- Joined: Mon Mar 27, 2006 4:18 pm
- Location: United States
In my 3/4" PVC union, I use scotch white duct tape. It goes at around 100 psi.
it was all 3/4"black iron but i could never get it to fire. i now know why, i would have had to use 3psi in my meter pipe, i was using 10. i also had a terrible spark setup. i may revisit it but not right now. it actually didn't cost me anything, i used various stuff laying around my garage. in my pneumatic testing i managed to shoot a sharpie marker about 80yds by accident. the silver metal tape worked the best for me pneumatic.