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PROPULSION

Progress Refueling System

ACTIVE
Fuel TransferTYPE
RSC EnergiaMANUFACTURER
850 (fuel payload capacity)MASS (KG)
100POWER (W)
Dual isolation valves per lineREDUNDANCY
ABOUT PROGRESS REFUELING SYSTEM

The Progress cargo spacecraft carries a fuel transfer system that can replenish the ISS propellant supply through fluid connectors in the docking interface. Unsymmetrical dimethylhydrazine (UDMH) and nitrogen tetroxide are transferred under regulated pressure to the Zvezda service module tanks. This capability eliminates the need to launch replacement propulsion modules.

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SPECIFICATIONS
CategoryPropulsion
SubcategoryFuel Transfer
ManufacturerRSC Energia
Mass850 kg
Power100 W
DimensionsIntegrated in Progress trunk section
RedundancyDual isolation valves per line
StandardRussian propellant transfer ICD
StatusActive
First UseJanuary 20, 1978
OPERATING PRINCIPLE
Pressurized fuel/oxidizer transfer through docking interface fluid connectors; regulated nitrogen pressurant pushes propellant into station tanks
KEY SPECIFICATIONS
propellantUDMH + NTO
transfer_kgUp to 850
interfaceDocking fluid connectors
station_tanksZvezda SM
MASS CONVERSIONS
Kilograms850.0 kg
Pounds1,873.9 lbs
VEHICLES USING PROGRESS REFUELING SYSTEM (2)
  • Progress MS
  • ISS (Zvezda)