REVERSE SHATTER Russian patent published in 2018 - IPC F16K15/03 F16K3/04 F16K3/30 

FIELD: valves production.

SUBSTANCE: in the reverse shutter the disk is attached to the swinging arm movably with the possibility of self-aligning the disc over the seat by means of a spherical hinge. Last is made in the form of a disk installed in the recess and a pin with a spherical surface attached to the bracket. Movable position of the trunnion in the disk is provided by a nut screwed into the disk with a concave spherical surface to obtain a spherical hinge formed by the convex surface of the trunnion and a concave surface of the nut screwed into the disc. Means of preventing its spontaneous unscrewing is made in the form of fixing elements of the U-shape. Seat that located in the body is made in the form of a spin, screwed or welded into the body of a bushing with a sealing surface.

EFFECT: invention is aimed for improving the reliability of the functioning and tightness of the locking elements due to the self-positioning of the disc (the tarely, the flaps) on the saddle and compensation for the deviation of the angles and the mutual arrangement of the sealing surfaces that arise when the seal surfaces are not accurately manufactured and worn out during the operation of the shutter.

4 cl, 12 dwg