Valve is used to control fluid flow, pressure and flow to the device. Controlled fluid can be liquid, gas, gas-liquid mixture or a mixture of solid-liquid. Usually by the valve body, valve cover, valve seats, pieces of gate, drive mechanism, seals and fasteners, and other components. The valve control is to rely on drivers or fluid movements driven hoist pieces, slip, or spin before turning motion to change the flow to an area the size of the achievable.

      The valve uses a wide, with people