| 摘要 |
pipe connections; reducing pipes for introducing shut-off fittings in pipe line. SUBSTANCE: proposed coupling has body with bell-mouth and flange, sliding flange with sealing chamber where sealing member is located, threaded bushes and fastenings. Threaded bushes are located in body flange. Interior angle of bell-mouth ranges from 8 to 40 deg. and sealing chamber is provided with circular part located on sliding flange which is equal to 0.3 - 0/6 of height of ring of sealing member. EFFECT: enhanced reliability and ease in use. 3 cl, 1 dwg
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