HYDRAULIC PISTON GATE VALVE Russian patent published in 1999 - IPC

Abstract RU 2126921 C1

FIELD: reliable shutting-off of pipe lines in an emergency. SUBSTANCE: hydraulic gate valve has body with guide sleeve, piston chamber, cover, mechanical energy accumulator, piston-gate and indicator of its position. Piston-gate is provided with interconnected passages filled with hydraulic oil forming labyrinth seal between piston-gate and sleeve. Piston-gate position indicator is mounted for limiting piston stroke and excluding its turn. EFFECT: enhanced reliability in automatic mode of operation. 4 cl, 8 dwg

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RU 2 126 921 C1

Authors

Gol'Denberg Boris Semenovich

Balashov Vladimir Anatol'Evich

Dates

1999-02-27—Published

1995-04-07—Filed