SHUTOFF VALVE Russian patent published in 2016 - IPC F16K3/14 

FIELD: machine building.

SUBSTANCE: present invention relates to the shutoff valve containing housing (1), two annular seals (20) located in the housing (1), and two located between annular seals (20) of gate drive (12), which by means of executor (7) can be brought into contact with both ring seals (20). According to the invention proposes each sliding disk (12) at its facing the other sliding disk (12) side equipped with a recess (28), in which the corresponding pressure block (22a, 22b), wherein each pressure block (22a, 22b) on its facing the other pressure pad side has groove (34, 37), at that both recess (34, 37) together form a space (40), in which there is a stack (23) of belleville springs containing several disk springs (41) with the first elastic force and first stroke of each spring and several disk springs (42) with the second elastic force and second stroke of each spring, wherein the first elastic spring force is greater than the second elastic spring force, and the first stroke of the spring is less than the second stroke of the spring.

EFFECT: proposed structure of the shutoff valve.

7 cl, 4 dwg