SA-Fire - Model Type PP -Foam Rim Seal System

nozzles. The pneumatic linear heat detector PLHD is independent for each unit and is installed along the protected seal arc. When a fire break out in the nm seal zone, the tube melts and create a pressure drop sensed by the actuator which instantly releases the extinguishing agent. The foam solution is then directed into the distribution circuit and discharged on the seal. The system is calculated to discharge in a very short time variable from 30 to 40 seconds in order to extinguish the fire and avoid fire spread. The coverage of each unit shall be evaluated depending on each floating roof tank: its foam dam geometry and the NFPA 30 classification of its contents. However, in most cases the unit is valid for roughly 40 meters of seal circumference protection. In the standard version the unit is equipped with two Ex pressure switches used to control system pressurization and activation respectively. Upon request is possible to equip the  unit with an additional pressure switch on the discharge line, a solenoid valve for remote activation, a common pneumatic fire detection system to all units or an electric linear heat detection system LHD. Every installation may be configured in a point to point or common zone depending on the interconnection and cable routing that is preferred.