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SAFE-SHEAR™ Burst Discs

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Technetics Group will design, manufacture, and test a precision burst disc assembly for your application.  Precision diaphragms are capable of precise and reliable burst point from low pressures or vacuum (1 psi pressure differential), up to 10,000 psi.  All this while maintaining up to 1% full-scale precision and infinitesimal leakage, regardless of infinite pressure and temperature cycles, dynamic environments, and harsh media.


Precision Burst Discs

The  SAFE-SHEAR™ Burst Disc is designed to set and verify exact rupture pressure in a non-destructive test.

The BELLEVILLE spring snap-over trigger mechanism relies on a proprietary solution to achieve extreme accuracy.  Diaphragm thickness resists 2 to 3 times the burst set pressure, and is capable of infinite cycling without degradation to fatigue.  Cycling may be up to 98% of set burst pressure without altering performance.

It has been demonstrated that Belleville type burst discs are one order of magnitude more accurate than Frangible type burst discs.



  • Pressures: 1 to 10,000 psi (.07 to 690 bar)
  • Rupture Tolerance: Up to 1% Full-Scale Pressure
  • Reverse Pressure Protection: full reverse, cycling
  • Temperature: -457°F to +1,000°F (-271°C to > +540°C)
  • Leakage: <1.0x10-9 sccs Helium
  • Size: <.25” to over 3.0” [76mm] free flow area
  • Mass: Variable, based on usage
  • Mounting: Flange, weld to tube, custom
  • Shock: Pyrotechnic, Operational & Crash Safety (call for details)
  • Vibration: Launch, Abort, Ground, Runway, high to low frequency (call for details)
  • Media: Compatible With Jet & Rocket Fuels, Oxidizers, other Harsh Fluids
  • Life: MTBF > 1,000,000 hours of operation (NPRD-95)
  • Tested millions of cycles without failure or setting creep, up to 95% of rupture
  • Materials: Aluminum, Stainless, Titanium, Inconels & Superalloys, PTFE
  • Qualification: Units have been tested and qualified to various RTCA DO-160, MIL requirements


  Unit with 100 psi Burst Setting subjected to forward pressure during Assy & Test maintains its shape. Unit with 100 psi Burst Setting where diaphragm has ruptured

Technetics Group allows you the ability to test burst pressure on each unit.

To learn more about our SAFE-SHEAR™ Burst Disc, download our Burst Discs PDF. You can also contact us for a custom-engineered solution to your application or to request a quote.