FIELD: space engineering, in particular, systems for measurement of leak-proofness of closed volumes, for example, pipe-line sections in fuel fed systems of jet engine installations on spacecraft in space conditions. SUBSTANCE: the system has a reservoir with a capacity varying in the process of tests made in the form of a bellows expansion joint provided with a pressure transducer, connected to the closed volume through a gas pressurization line, and to the gas pressure source through normally-open and normally-closed pyrotechnic valves and electropneumatic valves; the actuators of the above valves through a program-timing device are connected to the valve automatic control system; the closed volume is connected to vacuum and liquid sources through the electropneumatic valves. EFFECT: prevented gas inclusions from getting into liquid, eliminated errors of measurements at temperature fluctuations in the process of testing of leak-proofness, enhanced service life of the system in the conditions of space flight. 1 dwg
