PLUG VALVE Russian patent published in 1997 - IPC

FIELD: mechanical engineering, particularly petroleum and gas winning and processing industries; may be used in designing new valving for high pressure hydraulic pipelines. SUBSTANCE: distance rings in the valve are connected with each other by thread. The first end face of the external distance ring is provided with concentric groove intended to receive packing member. The second end face of the external distance ring has radial grooves and internal surface of the internal distance ring has spline grooves. Placed in the mentioned recess is plate retainer with external projections entering the mentioned radial grooves and with inner bent projections entering the mentioned spline grooves for connection of distance rings in the preset position after adjustment of the packing force, which is controlled by screwing in or out the distance rings. EFFECT: improved operational reliability of the valve. 1 dwg