FIELD: pipeline valves.
SUBSTANCE: specified movement of the seats occurs by means of a gear transmission that transmits the rotation of the spindle through the couplings to the sliding seats.
EFFECT: creating a ball valve with sliding seats, which has increased reliability and service life, due to an increase in the number of opening-closing cycles of the valve with tightness on the valve gate, by eliminating the abrasive effect of the ball plug on the seats by moving the seats away from the ball plug during its rotation when closing or opening the valve.
3 cl, 7 dwg
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