FIELD: shut-off fittings. SUBSTANCE: ball cock has body with inlet and outlet holes, valve ball mounted in body for rotation between two sealing rings, two end-pieces connected to inlet and outlet holes of body and at least one support where one of sealing rings is laid; this support is pressed in direction of valve ball by one of end-pieces. Body and support have plane-parallel butts on outer side. Respective end-piece is welded to butts by vibration welding, thus making solid flat joint. Support adjoins shoulder of body on inner side. EFFECT: simplified construction; enhanced reliability. 4 cl, 1 dwg
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