METHOD FOR ADJUSTING BALL VALVES WITH THREADED SLEEVES

FIELD: ways of adjustment.SUBSTANCE: invention relates to a method of adjusting ball valves with threaded sleeves. Claimed method is based on the structural feature of said cranes. Proposed method for adjusting ball valves with threaded bushes is to alternately and uniformly install threads of threaded bushes by applying a torque of a certain value to compress the seats through the ball stopper, holding for 24 hours for this reduction. In this case, subsequent alternate and uniform loosening or tightening of the threaded bushings is performed, applying the necessary tightening torque to achieve the specified control torque, application for the subsequent adjustment of the tightening of the threaded bushes along the vertical axis of the faces on the end surfaces of the threaded bushes and the housing on both sides, selection of the axial clearance of the average diameters of the threads of the bushes and the body by crimping the press with a force equivalent to the total force obtained from tightening the studs when installing a ball valve on a pipeline, fixing the amount of displacement l used to calculate the value of the chord L by the formula:, where P is the thread pitch of the threaded bushes and body, (mm); D is the diameter of the circle on which the risks are applied, (mm); l - the displacement value obtained during crimping of the ball valve in the press, (mm), and the subsequent deposition on the end surfaces of the body of the value of the chord L from the vertical scales in a counterclockwise direction along the diameter of the circumference D and the application of the faces on both sides, rotate the threaded sleeves counterclockwise to the chord value L from the two sides of the ball valve to align the flats on the threaded sleeves and the rims on the body, providing the control moment when the crane is crimped in the ball in the press, which allows for the installation of a ball valve on the pipeline and clamping it between the flanges along the sealing surfaces to provide the necessary moment of control of the ball valve, and the selection of the axial clearance of the average diameters of the threads of the bushes and the casing does not lead to an increase in the moment of control of the ball valve.EFFECT: way of adjusting the cranes.1 cl, 3 dwg Изобретение относится к способу настройки кранов шаровых с резьбовыми втулками. Заявленный способ основан на конструктивной особенности указанных кранов. Предложенный способ настройки кранов шаров