OPW Fueling Components” OPW 10 Plus emergency shutoff valve builds upon the design of the company’s existing 10 Series emergency shutoff valve, with the addition of patent-pending SmartGuard technology, which is designed to contain fuel leakage at the shear groove and activate the valve to close in the event of a low-impact incident. The shutoff valve is designed to contain a shear-groove leak and close the flow of fuel in the event of an undetected low-impact break. The SmartGuard design helps to eliminate the risk of fuel leaking into sumps from shear-groove fractures and thus reduces the risk of environmental contamination and sump fires. The shutoff valve, like its predecessor, the 10 Series, is UL-listed and includes a fusible link designed to automatically close the valve to reduce a fire hazard. A double-poppet design is intended to provide a safer environment in the event of a shear or sump fire.