The BSR safety system is an automatism which, incorporated into the J3C actuators, allows, in the event of a power failure, the valve to be placed in a predetermined NC or NO position. The BSR circuit board is located inside the actuator, together with the battery pack, which is continuously charged, allowing the actuator to be activated, if necessary, when the unit detects a power failure. It should be noted that this is not a simple effect actuator, but in the event that the valve is in a non-preferred position, the BSR system, by means of the batteries, will operate the valve until it is in the predetermined preferred position, acting as a simple effect actuator.