Once the punch pierces the diaphragm, the burst disc rapidly releases all pressure. To prevent losses for applications with minimum pressure operational requirements or where the system is remote and cannot be recharged, we can include pressure-relief valves integral with the burst disc. Our relief valves prevent loss of all product pressure and therefore allow pressure-dependent components to continue operation. Our burst disc/relief valve components offer up to 80% weight savings compared to other redundant systems.
NASA considers our type of advanced disc equivalent to two relief valves, letting a single one meet NASA’s two-fault-tolerant requirement (Ref. NASA payload safety requirement NHB 1700.7; NASA-JSC NSTS/ISS 18798; JCS Letter TA-88-074). – “The preferred burst disk design for payloads is one which employs a reversing membrane against a cutting edge to assure rupture. Historical use and experience indicate that a burst disk of this type can be certified as a highly reliable pressure relief device.”
Space-based applications of burst discs require material solutions designed to withstand aggressive rocket fuels, oxidizers, and other harsh fluids. Materials of construction can include aluminum, stainless steel, superalloys, and PTFE.
Aside from our Human Spaceflight applications, including the International Space Station and the Orion, additional spacecraft, satellites and aircraft that utilize our SAFE-SHEAR™ technology include:
- RRM3 Orbital Refueling Mission
- The Cassini Spacecraft
- The Hubble Space Telescope
- The Spitzer Telescope
- Wide-Field Infrared Survey Explorer
- Mars Global Surveyor
- Gravity Probe-B
- V-22 Osprey / KC-390