SHUTOFF VALVE FOR THE SENSORS INSTALLATION Russian patent published in 2018 - IPC F16K15/02 F16K15/20 

FIELD: measuring equipment; manufacturing technology.

SUBSTANCE: shutoff valve for the sensors mounting comprises housing consisting of two arranged one in the other parts. Outer part is made in the form of a hollow cylinder with flange, on the outer part inner wall at one end a pressure sensor installation thread is made, from the other end, for the housing inner part press fit a protrusion is made, which is a non-return valve with ball gate. Shut-off valve comprises piston in the form of a cylinder, on which one end surface the annular groove is made, with formation of the piston external wall and internal cylindrical part, the pusher, and on the piston other end face, the bottom, vertical blind axial hole is made, communicating with the through horizontal hole, made at the pusher bottom with possibility to communicate with the check valve cavity. By the end face with annular groove, the piston faces the non-return valve, wherein the annular groove width is such, that the piston outer wall enters the gap between the housing outer part inner surface and the housing inner part outer surface, groove depth is selected from the condition of ensuring the piston stroke, the pusher rests against the ball, and the pusher diameter is equal to the hole in the ball gate diameter.

EFFECT: invention enables the sensors replacement without the liquid medium draining from the system.

3 cl, 2 dwg