Undesirable materials that stiffen up and settle down by time in the tank should be sent out of the system. If this is done manually less than the required, it harms the system, if it is done more than the required, the enegy cost increases. NST-P11 bottom blowdown system prevents unnecessary enegy consumption as well as protecting the armatures inside the pipeline. NST-P11 bottom blowdown system consists of an automatic / manual timer with time adjustment, 2 pc full port ss ball valve with actuator and switch box that gives feedback about position.