GATE VALVE Russian patent published in 2005 - IPC

FIELD: valving.

SUBSTANCE: gate valve has housing with through passages and gate with the through opening. Movable bushing seats are mounted in the sockets of the housing and pressed to the gate with springs. The sealing members are mounted between the gate and bushing seats. In addition, the gate valve has spindle with a seal, cover, and flywheel. The sealing members are made of self-sealing U-shaped collars mounted in ring bores. The open side of the collars faces the center. The ring bores are made in the opposite sides of the gate sides to be sealed. Each collar is provided with a thin-walled ring which is set in its ring space. Movable seats are provided with webs. The webs are rigidly connected with the seats and elongated in the diametrical direction. The length of the webs from the side of the cover is no less than the length of the spindle stroke. From the opposite side, their length is equal to the sum of spindle stroke and half diameter of the through passage in the housing plus 2-3 mm.

EFFECT: enhanced reliability and reduced cost.

1 cl, 4 dwg