PYROVALVE Russian patent published in 1999 - IPC

FIELD: pipeline fitting. SUBSTANCE: pyrovalve includes housing with inlet and outlet branch pipes, lateral cavity with closing plug, tube portion. Inlet and outlet branch pipes are arranged coaxially. Between inlet and outlet branch pipes tube is mounted. Lateral cavity is in the form of stepped cylindrical opening with cone transitional surface between steps. There are end portion in housing near cone transitional surface and cone surface on smaller step. Closing plug is cylindrical one, it has two steps with cone surfaces on large and mean steps near step ends. Tube with thin wall passes through smaller steps of plug and opening at minimum gap in such a way that ratio of diameter D of mean step to diameter D1 of smaller step is in range 1.01-1.02. Argentum layer is applied onto surface of mean step of plug. EFFECT: enhanced sealing degree of working fluid, high reliability and safety of pyrovalve. 2 cl, 1 dwg