SAFETY VALVE Russian patent published in 1997 - IPC

FIELD: valve. SUBSTANCE: inlet branch pipe of the safety valve is inclined to the axis of the rod. The outlet branch pipe and the rod are axially alined. Inside the outlet branch pipe is a seat. The rod is made up as two parts interconnected through telescopic ties. Distractible calibrated rod is arranged inside the housing of the valve for permitting interaction with one of the portions of the rod. The other portion of the rod is composed of two steps interconnected by means of a thread. The smaller step is provided with a valve member with a flexible seal. The step of greater diameter is provided with additional flexible seal, Between the seals is a distant bushing interacting with them by their end faces. EFFECT: enhanced reliability. 1 dwg