PLUG Russian patent published in 2003 - IPC

FIELD: construction engineering; disconnection of consumers from gas line. SUBSTANCE: proposed plug includes stopper of round section, elastic sealing ring, detachable rod of tubular section, hold-down flange separated from stopper by sealing ring forming clearance together with stopper which is adjustable by means of helical gearing. Screw of hold-down flange passing inside stopper includes lock joint members at end face for connection with rod whose length is no less than 5 diameters of stopper. Hold-down flange has straight or convex curvilinear surface of rotation on side of sealing ring at radius no less than 0.4 diameter of stopper. EFFECT: extended range of application. 5 cl, 7 dwg