Separation Nut PSM 1/2B
Beyond Gravity (ex-RUAG Space)
Low-shock separation nut for constellation-class satellites of typically 500-1000 kg, qualified per AIAA S-113-2005.
Typed specifications15 values
Discloses 4 of 10 fields engineers filter by in this category (category median 2).
- Mass
- 430 g datasheet p.3
- Preload / holding force
- 50 kN nominal · datasheet p.3 50 kN nom.
- Envelope (L×W×H)
- 77 mm Height datasheet p.3
- Release time
- 2 ms datasheet p.3
- Operating temperature
- -68–120 °C datasheet p.3 -68–120 °C qualification temperature span
- Separation type
- point separation bolts or nuts low shock separation nut · datasheet p.1
- Max spacecraft mass
- 1 000 kg datasheet p.1
- Release command type
- pyro firing pulse initiated by dual NSI equivalent initiators (PC23, 103377-191… · datasheet p.2
- Random vibration
- 50 g RMS overall random vibration levels (qualification) · datasheet p.3
- Satellite class
- large >500 kg developed to fit constellation class satellites, typical 500-… · datasheet p.1 smallsat 100-500 kg typical | large >500 kg typical
- Stack height
- 77 mm datasheet p.3
Each value is typed with its unit and measurement condition and cites the datasheet page it was taken from. Nothing is guessed: a field that is absent here has not been published by the manufacturer. machine-extracted ✓ checked by NewSpace Market ✓ manufacturer confirmed by the manufacturer.
As published by the supplier14 lines, in the manufacturer's own wording
- Target spacecraft class
- Constellation class satellites, typically 500-1000 kg
- Qualification
- AIAA S-113-2005 (former DOD-E-83578A)
- Initiators
- Dual NSI equivalent (PC23, 103377-191/-449/-500, PD222400024-009, 2-8001140-1, 852420-XX)
- Worst-case tests passed
- Single 80% initiator, cold case, no o-ring, 150% external load - 100% success
- Design feature
- Internal mechanical leverage reduces initiator pressure spike and shock; direct drop-in replacement for classical higher shock separation nuts
- Bolt pretension (nominal)
- 50 kN
- Mass
- 0.43 kg
- Dimensions Height
- 77 mm
- Interface Separation Bolt
- UNF/UNJF 1/2’’-20 Class 3 A with 25.5 mm engagement length
- Interface Separation Nut
- Two M5 bolts (or imperial equivalent) placed 52.5 mm apart
- Qualification temperature span
- -68 to +120 °C
- Overall random vibration levels (qualification)
- 50 gRMS
- Release time dispersion
- Within 2.0 ms on a 3σ-level
- Reliability
- 0.99995 at a 95% confidence level
About
The Beyond Gravity PSM 1/2B Separation Nut is the medium member of the family of Low Shock Separation Nuts designed for interfacing medium sized spacecraft with launch vehicles. It has been developed to fit constellation class satellites, typically 500-1000 kg.
The PSM 1/2B introduces an internal mechanical leverage minimizing the required pressure spike generated by the initiators. Hence the shock is significantly reduced without sacrifice of reliability compared with heritage separation nuts.
The separation nut avoids metals with different thermal expansion coefficients to achieve a wide thermal operation range. It has been designed as a direct drop-in replacement for many of the classical higher shock separation nuts.
It is qualified per AIAA S-113-2005 (former DOD-E-83578A) and initiated by dual NSI equivalent initiators. Worst case scenarios were tested with 100% success: single 80% initiator, cold case, no o-ring, and 150% external load.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.