SAFETY VALVE Russian patent published in 2002 - IPC

FIELD: fuel tanks and pressurization systems of rockets and spacecraft. SUBSTANCE: safety valve has body with inlet and outlet passages, seat, shut-off member, control sensitive element, passages bringing the inlet passage in communication with control sensitive element. Shut-off member is provided with relief sensitive element whose inner cavity is tightly isolated from outlet passage forming control chamber by outer surface of control sensitive element and inner surface of relief sensitive element. This chamber is brought is communication with inlet passage of valve by means of passages made in shut-off member. Effective area of relief sensitive element is no less area of shut-off member. Area of control sensitive element is more than difference between areas of relief and shut-off members. Secured on surface of shut-off member directed towards inlet passage is disk-type ejector forming circular slot between surfaces of shut-off member and ejector which is communicated with control chamber. EFFECT: enhanced tightness, increased flow rate of gas through valve, reduced mass and dimensions of valve; extended range of equipment. 4 cl, 2 dwg