VALVE AND METHOD FOR PRELIMINARY LOADING OF VALVE SPRING Russian patent published in 2018 - IPC F16K7/20 

FIELD: machine engineering.

SUBSTANCE: valve (10) comprises a valve body (11), a valve cover (14), and a valve stem (13). The valve cover is connected to the valve body, lower end of valve stem is connected to lower part of the valve body, the upper end of the valve stem passes through the upper part of valve body. The valve additionally comprises a spring (15) mounted on the valve stem and located in the lower part of the valve cover connected thereto by one end. The valve further comprises a first element (18) in threaded connection with the upper end of the valve stem; and a second element (19) fitted on the upper end of the valve stem and located between the first element and the valve cover. The second element compresses the spring when the valve cover is mounted on the valve body.

EFFECT: enhanced reliability of valve operation.

8 cl, 9 dwg