VALVE Russian patent published in 2013 - IPC F16K17/04 F16K15/03 

FIELD: machine building.

SUBSTANCE: valve contains a housing with pass channel and attachment flanges, a seat, turning shut-off member in the form of gate located in the housing in close proximity to the seat and interacting with mechanism of device actuating by reduction and/or increase of pressure, the device is located on the housing. This mechanism includes a housing and a nut. The nut by its supporting inner surface interacts with one supporting surface of high-pressure spring by thrust bearing, and by the others its supporting surface it interacts with supporting surface of sleeve. The sleeve is made with possibility of axial movement and is installed inside the housing. A bushing with possibility of axial movement is installed inside the sleeve. The bushing interacts with supporting surface of low pressure spring installed on stock. The stock is located inside the sleeve and is made with possibility of axial movement. By the other supporting surface the bushing interacts with supporting surface of the stock. The gate restraint in open position is made as a cylinder. The cylinder is made with possibility of axial movement in the tip of the stock. Spring-loaded balls are arranged in the cylinder walls with possibility of radial movement. The cylinder is installed on outer surface of the gate. The cylinder is provided with at least one annular shaped groove.

EFFECT: improving valve operating reliability.

2 cl, 3 dwg