Our electrically actuated stop cocks are available in brass or stainless steel as throughway ball valves or 3-way ball valves. The actuators are fitted with limit switches that sense the end positions. Every actuator is fitted with a manual emergency operation facility. Some units can also be fitted with the "Battery Safe Return" option, which move the actuator back to a defined position with battery emergency power if there is a power failure. Wherever possible, we recommend using a single-action pneumatic actuator instead of the electrical emergency reset.