FIELD: machine building.
SUBSTANCE: proposed device comprises body, spindle with shut-off element and flywheel, packing assy case with through opening and space for sealing material, and pressure sleeve. Packing assy case through opening diameter exceeds that of spindle by amount making two spindle eccentricities in said area. Sealing washer is arranged on spindle between packing material and packing assy case space face and features inner diameter exceeding that of spindle by fit with clearance. Washer outer diameter and packing assy case space diameter are calculated from definite relations.
EFFECT: longer life of gate valves in severe operating conditions.
2 dwg
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