SAFETY VALVE Russian patent published in 2020 - IPC F16K17/00 

FIELD: valve industry.

SUBSTANCE: invention relates to valve industry and is intended for use as a safety valve of periodic action, allowing multiple actuation and reverse seating of valve closing element with provision of required degree of tightness before and after actuation in systems of nuclear power engineering, chemical industry, power complex. Technical result is achieved due to that between adjusting nut and support bushing of load bearing element of external spring is additionally installed transmission bushing, having stops in form of pins passing through slots in support nut of load bearing element of internal spring, and adjusting screw, creating load on inner spring, is screwed into said support nut fixed in fixing mechanism housing, wherein thrust bushing of load bearing element of external spring has cylindrical shell containing working direction area for bearing bushing of load-bearing inner spring loading element, and the separator contains a cylindrical skirt, the inner surface of which forms a working direction area for the external spring loading element load bearing sleeve.

EFFECT: enlarging technical capabilities when servicing the valve during manufacture, testing and operation, improving processability when adjusting the valve to the required characteristics.

5 cl, 1 dwg