FIELD: machine building.
SUBSTANCE: group of inventions refers to piping valves, and namely to safety valves, and intended to be used as a device for pressure equalization. The stem assembly for valves contains a stem, sleeve, vertical support, set slot, sealing surface around the slot, socket with wedge surface, and multiple channels for passing of fluid medium flow. The stem from one end interacts with driving cam for controlling the fluid medium flow through the valve. From the other end the stem interacts with the sleeve. The rod enters the slot. The sleeve is located with a possibility of interaction with the socket of vertical support or is located at a distance from the socket of the vertical support. The sleeve contains the wedge sealing surface, recess and seal located in the named recess. The named wedge sealing surface of the sleeve and the named seal are intended for tight engaging with the wedge surface of the socket of the vertical support. There is an internal valve using the named stem assembly.
EFFECT: group of inventions is aimed at improvement of reliability of operation with ensuring of redundant seal of conjugate metal surfaces of the stem assembly.
14 cl, 13 dwg
