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Eaton’s primary and secondary oxygen regulators are part of the portable life support unit of an astronaut’s extravehicular mobility unit (EMU), more commonly known as a spacesuit. These motor-controlled regulators are used to manage ventilation pressure within the spacesuit assembly to accommodate an astronaut's oxygen demand or when the primary pressure control module becomes disabled.
| Item | Imperial | Metric |
| Medium | Nitrogen | |
| Inlet Pressure | 600 to 4,800 psig | (41 to 331 barg) |
| Outlet Pressure | 285 to 315 psig | (20 to 22 barg) |
| Lockup Pressure | 325 psig | (22 barg) |
| Inlet Proof Pressure | 6,750 psig | (465 barg) |
| Outlet Proof Pressure | 600psig | (41barg) |
| Inlet Burst Pressure | 11,250 psig | (776 barg) |
| Outlet Burst Pressure | 1,000 psig | (69 barg) |
| Flow | 0.150 lbm/s | |
| Internal Leakage | < 2.8 x 10-2 sccs | |
| External Leakage | < 1.0 x 10-3 sccs | |
| Weight | 1.0 lb max | (0.45 kg) |
