Fastening device shutter type valves bureau for allowing maintenance dams are filled with water.

摘要

1. Fastening device shutter type valve Bureau for dams, which allows maintenance with water load, consisting of three male conical elements (Fig. 2 - Item 7), attached to the shutter board Bureau valves, and three female tapered elements (Fig. 2 - Item 11) at the top or dome of the Bureau valves intended to male cones, can adjust conducting fluid seal and allowing the fixation and immobilization of the board - shutter, using screws designed for this purpose .