The BSR safety system is an automatism that, incorporated into the J3C actuators, allows, in the event of a power failure, to place the valve in the NC or NA predetermined preferential position. Inside the actuator is located the BSR circuit board plus the battery pack which is continuously charged, allowing the actuator to be activated, if necessary, when the unit detects a power failure. It must be taken into account that this is not a simple effect actuator, but in the event that the valve is in a non-preferential position, the BSR system, using the batteries, will actuate the valve until it is placed in the predetermined position as preferential, acting as a simple effect actuator.