FIELD: pressurization of propellant tanks of space flying vehicles. SUBSTANCE: pressurization system includes pneumatic mains connected with pressurization bottles and gas cavities of fuel and oxidizer tanks. Each pneumatic main is provided with start and cut-off valve, gas reducer and check valve mounted in succession. System is also provided with additional pipe line with start and cut-off valve which is connected to pneumatic mains in sections between gas reducers and check valves. EFFECT: reliable serviceability of system in case of untightness in one of pressurization bottles; enhanced reliability of system. 1 dwg
