A diaphragm bellows used in bellows-type pipeline valves extends the service life of valves by increasing the cyclic strength of a bellows unit, which is obtained by more even distribution of deformation load on a shaped corrugation. Moreover, a diaphragm bellows has a lower rigidity. It is a part of propellant overflow systems with liquid and gas separation for refueling in orbit of spacecraft. It is an integral part of the launch vehicle's fuel system. Its design accepts hydraulic shock loads at the time of starting the propulsion system.