It is intended for the process of lowering and equipping wells screened pipe, providing a straight flush bottom zone before installing them. Valve allows the isolation of the cavity of the filter and tubing during production and perform repeated washing of the borehole in the event of clogging the filter and retrieving the layout at the surface. Lug-valve is installed at the lower end of the layout of filters with a nominal diameter pipes DN = 73 and 89 mm.