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Specifications <br /> • Model: 708-590 Series <br /> • Type: Class I Automatic Overfill Shutoff Device—Gravity Fill Only <br /> • Size: Fits through 4" schedule 40 (DN 100) pipe <br /> • Flow rate: 25-370 GPM (95-1400 LPM) <br /> • Static pressure rating: 10 PSI (0.7 bar) MAX <br /> • Compatibility: Liquid petroleum fuel blends (EO-E85, 130-1320) <br /> Valve operation <br /> The Franklin Fueling Systems (FFS) model 708-590 Series Overfill Prevention Valve (OPV) is <br /> designed with a primary shutoff that activates between 85 and 92% of tank volume, depending <br /> on the tank diameter. When the primary shut-off is actuated, the flow through the OPV is limited <br /> to less than 8 GPM (30 LPM). A secondary, positive shutoff happens at 95%tank volume if you <br /> continue filling.After primary shutoff, you can still drain the delivery hose, but you must be <br /> extremely careful and follow these steps: <br /> 1. Close the truck bottom loading valve. <br /> 2. Wait 5 minutes <br /> 3. Partially open the coupler between the delivery hose and the bottom loading valve and <br /> allow the hose to drain. <br /> NOTE: Shutoff points are affected by the specific gravity of the stored liquids.These instructions <br /> are based on the average performance of all products.The OPV was designed to be only an <br /> emergency overfill prevention device. <br /> NOTE: Determine if the underground storage tank has a ball float vent valve. If it does, make sure <br /> the nipple portion does not extend more than 3" (76.2 mm) into the tank. <br /> 3 <br />