FIELD: machine building.
SUBSTANCE: present invention describes versions of methods and devices for independent control of force for landing in a rotary valve. Version of the device comprises a rotary valve having a flow control element and a double action drive operatively connected to the rotary valve. Drive has the first and the second holes to receive the control fluid medium under pressure to change the drive position. This version of the device additionally comprises a valve controller functionally connected to the drive to regulate the controlled fluid medium under pressure in response to the position of the rotary valve. Version of the device additionally comprises a pressure limiter functionally connected to the valve controller and connected to the first hole of the drive fluidly. Pressure limiter is designed to reduce pressure of fluid medium, which is under pressure and supplied to first hole of drive, to reduce the force for the flow control element seating when the rotary valve is in the closed position.
EFFECT: disclosed is a device (versions) for independent control of forces for landing in rotary valves.
20 cl, 4 dwg
