APPAREIL ET PROCEDE D'INSERTION D'UNE VANNE ENTRE LES BRIDES D'UN JOINTD'UNE CONDUITE

摘要

Apparatus and method for inserting a spade valve member between the flanges of a joint in a fluid-containing conduit to vary the flow of fluid, in which a divided casing is placed around the conduit and contains the spade valve and the flanges, the casing having means for securing its parts together, means for separating and refastening the flanges of the joint and means for moving the spade valve between the flanges.