Valve Lockout Device is used on oil and gas applications to mechanically stop the handle from rotating to ensure that the valve remains inoperable while technicians carry out maintenance work. The Valve Lockout Device is attached to the operational part of Barksdale’s heavy duty valve to prevent the valve from changing position. Valve lockouts help prevent potentially harmful accidents during maintenance or repairs and allow workers to close off or isolate energy sources such as hydraulic pressure and fluids. This specific lockout device is designed for use on Barksdale’s heavy duty valves 1/2″ valves or 1″ oil & gas valves to stop any rotation of the handle.