PYROTECHNIC SHUTTING OFF VALVE Russian patent published in 1996 - IPC

FIELD: valve. SUBSTANCE: valve has housing, pyrotechnic chamber, and diaphragm. A piston with a conical plug is received in the cylindric bore. The plug is mounted for permitting wedging in the answered conical seat and disconnecting the inlet and outlet openings in the housing. One of the openings is made in the side of the seat. A bore is made at the location of the intersection of the opening with the surface of the seat. The bore separates the seat into two parts. The conical plug is provided with a bore for permitting connection it with the opening in the side of the seat when the pyrotechnic valve is actuated. A shear diaphragm is secured to the piston or made in block with it and fixedly secured to the housing to permit pressure-tight separation of the pyrotechnic chamber from the cylindric bore in the housing. EFFECT: enhanced reliability. 16 cl, 5 dwg