The Netherlocks Power Wrench portable valve actuator is designed to facilitate operation of manual valves while contributing to safe working conditions. It is capable of opening and closing any size, type or number of manually operated valves, making it a cost effective alternative to multiple actuators. The Power Wrench connects to valves by a bolt-on universal drive plate, allowing a single Power Wrench to operate multiple valves. It is pneumatically powered (4-7 bar) and safe for use in applications where explosive and/ or flammable liquids or gasses are present. An integrated safety lever and throttle valve enforce two-handed operation of the Power Wrench, eliminating the possibility of injury during usage even at maximum power. Variable speed control allows operation at the user’s comfort level. The device is lightweight at 22 pounds and easily operated from a comfortable standing position, reducing operator fatigue.