SAFETY VALVE Russian patent published in 2017 - IPC F16K17/08 

FIELD: construction.

SUBSTANCE: safety valve is comprised of a housing with inlet and outlet channels, a spring-loaded valve with sealant against the seat, the bellow valve with the top support loaded by an adjusting spring. The valve is provided with an elastic centering membrane located between the scuff plate, upon which the adjusting spring rests, and the upper support of the bellow valve, which interacts with the scuff plate via a threaded connection. The outer edges of the elastic centering membrane come into contact with the ring on the one side, and with the sleeve on the other. A ring and a sleeve are placed between the flange of the bellow valve mounted inside the housing, and a barrel screwed into the housing. Ring protrusions come into contact with the grooves made in the housing. The housing contains a sleeve around the spring-loaded valve with a longitudinal slot running through it. A fixing element, mounted in the side wall of the spring-loaded valve that prevents it from hinging relative to the seat, comes into contact with the slot. The access duct is connected to the interior of the bellow valve through the grooves in the sleeve and the abutment that come into contact with upper support of bellow valve via a threaded connection. The spring that presses the valve to the seat is located in the abutment and comes into contact with the upper support of the bellow valve and the screw fixed in the valve.

EFFECT: more precise opening pressure of the safety valve and its integrity with the seat.

2 dwg