SAFETY VALVE Russian patent published in 2014 - IPC F16K17/04 F16K17/06 F16K17/30 F16K27/00 

FIELD: machine building.

SUBSTANCE: group of inventions relates to pipeline valves and is designed to protect tanks against excessive pressure. A safety valve comprises a body, a safety valve cap with a hole and a piston unit of equilibrium pressure. The body is fitted with external thread to be connected to another body having a pressurised chamber by means of a threaded joint. The safety valve cap with the hole is connected to the body by a threaded joint with the inner thread of the body. The safety valve cap comprises a shutoff surface. The piston unit of equilibrium pressure, at least partially, forms a pressure-tight chamber of equilibrium pressure. The piston unit of equilibrium pressure comprises an opening which, as per the fluid medium, joins the equilibrium pressure chamber with the pressurised chamber. The piston unit of equilibrium pressure is made so that to be able of sliding travelling inside the body in relation to the safety valve cap and the shutoff surface to control the flow of fluid medium between the pressurised chamber and the safety valve cap. Design version of the safety valve is proposed.

EFFECT: enhanced operating reliability of safety valves.

19 cl, 3 dwg