GATE Russian patent published in 2010 - IPC F16K1/22 

FIELD: machine building.

SUBSTANCE: gate consists of branch 1, of case 2 with seat positioned therein, of rotary disk 3, of driven shaft 4, of driven shaft packing, of bearings and of covers. Spherical surface with two orifices is made in rotary disk 3 along external surface. The seat corresponds to collar 9 of L-shape cross section with a packing fringe. In the case there is installed spring loaded stop 10 of the collar with conic surface interacting with the packing fringe of collar 9. A packing lug interacting with the end of collar 9 is made on the end of branch 1. Two back valves are installed on external surface of branch 1.

EFFECT: increased reliability, increased resource of operation and facilitation of gate pressure tight closing.

7 cl, 1 dwg