Knife valve for atmospheric systems

A guillotine valve to operate in open tanks, completely submerged in a fluid, which allows controlling a flow rate of fluids in atmospheric systems, wherein the guillotine valve includes:

• at least one cage attached to an inlet or outlet of at least one tank;
• at least one gate which controls a flow of the fluid;
• at least one movement transmission means which allows the at least one gate to be moved between at least one open position and at least one closed position;
• at least one anti-vibration head which joins the at least one gate with the at least one movement transmission means allowing the axial movement of the at least one gate;
• and
• at least one guide means arranged in the same direction as the at least one movement transmission means which allows a tight fit between said at least one guide means and the at least one cage,
• wherein the at least one guide means comprises at least two idlers, wherein the at least two idlers comprise a conical shape having a smaller diameter at its lower end, increasing progressively to its upper end.