SYSTEM FOR AUTOMATIC CONTROLLING BALL VALVE SADDLE POSITION Russian patent published in 2017 - IPC F16K5/20 F16K31/42 F15B9/03 

FIELD: machine engineering.

SUBSTANCE: system includes a control unit connected with the pneumohydraulic drive of the ball plug rotation. The emergency doubler is with a hand pump. Two cavities are formed with the appropriate pre-saddle and post-saddle fittings in the ball valve saddle zone formed as a stepped piston. The system further contains a check valve with the piston type erosion, the input of which is connected with an outlet branch pipe of the selective valve and the first branch pipe of the three-way manual valve. The body cavity of the check valve is connected with the pre-saddle fittings of each saddle. The body cavity outlet of the check valve is connected to atmosphere and closed by the shut-off element. The over-piston valve cavity is connected with all post-saddle and the second branch pipe of the three-way manual control crane, the third branch pipe is connected to the cylinder cavities of the pneumohydraulic drive, the latter are connected via the control unit with atmosphere or with the outlet branch pipe of the shuttle valve. The three-way crane establishes two operating positions: the first position - "closed manual control", in which the first branch pipe line is blocked, and the second and the third branch pipes are interconnected, and the second position - "open manual control", in which the third branch pipe line is blocked, and the first and the second branch pipes are interconnected .

EFFECT: performance improving.

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