PROPELLANT TANK PRESSURIZATION SYSTEM OF SPACE CRAFT PROPULSION UNIT Russian patent published in 2000 - IPC

FIELD: space vehicles. SUBSTANCE: proposed system has carry-on compressor connected by high-and low-pressure pneumatic main lines with pressurization bottles and gas spaces of fuel tanks, gas pressure regulators and check valves installed in low-and high-pressure pneumatic main lines, respectively, and starter-cut-off valves. System is provided with additional carry-on compressor whose inlet is connected to low-pressure pneumatic main lines after gas pressure regulator, and outlet is connected to high-pressure pneumatic main lines. High-pressure warning indicator and check valve are installed at outlet of each carry-on compressor. Low pressure warning indicator is installed after gas pressure regulators. These indicators are electrically coupled with gas transfer compressor system automatic control unit. EFFECT: improved survivability of system and reliability of pressurization of tanks in service. 1 dwg