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OPW 7150 Overfill <br />Prevention Valves <br />The CARB-certified OPW 71 SO <br />vapor -tight Overfill Prevention Valve <br />is designed to prevent the overfill of <br />underground storage tanks by providing <br />a positive shut-off of product delivery. <br />The shut-off valve is an integral part of <br />the drop tube used for gravity filling. <br />The OPW 71 SO allows easy installation <br />(without breaking concrete) and requires <br />no special manholes. <br />The OPW 71 SO is a vapor -tight two- <br />stage shut-off valve. When the liquid <br />level rises to about 95% of tank <br />capacity, the valve mechanism is <br />released, closing automatically with <br />the flow. This reduces the flow rate to <br />approximately 5 gpm through a bypass <br />valve. The operator may then stop the <br />filling process and disconnect and drain <br />the delivery hose. As long as the liquid <br />exceeds the 95% level, the valve will <br />close automatically each time delivery <br />is attempted. <br />If the delivery is not stopped and the <br />liquid rises to about 98% of tank <br />capacity, the bypass valve closes <br />completely. No additional liquid can flow <br />into the tank until the level drops below <br />a reset point. <br />NOTE: The 71 SO Overfill Prevention <br />Valve can be adjusted to shutoff at any <br />desired tank capacity. Please contact the <br />Authority Having Jurisdiction (AHJ) and <br />review local, state, and national codes to <br />determine the regulatory requirements <br />governing shut-off capacity in your <br />region, as well as take into account <br />other considerations such as extreme <br />tank tilt. In all cases, the upper tube <br />must protrude into the tank at least <br />6 1/2" to ensure that the valve can shut <br />off flow into the tank completely before <br />the top of the tank is wetted as per <br />EPA requirements. <br />71 SO Instruction Sheet Order <br />Number: H15524PA <br />Listings and 0- USC <br />California Air <br />Certifications Re ou ces Board <br />Materials <br />Important <br />In order to prevent product <br />Valve Body: Cast aluminum <br />spillage from the Underground <br />Float: Nitrile rubber, closed cell foam <br />Storage Tank (UST), properly <br />maintained delivery equipment <br />Valve: Aluminum <br />and a proper connection at the <br />tight -fill adaptor are essential. <br />Seals: Viton® <br />Delivery personnel should <br />Upper &lower Drop Tube: Aluminum <br />be managed and trainedto inspect delivery elbows <br />Plastic parts: Acetal <br />and hoses for damaged and <br />missing parts. They should <br />Hardware: Stainless steel <br />always make certain there <br />is <br />a positive connection <br />Features <br />between the adaptor and <br />elbow. If delivery equipment <br />♦ Simple, Easy and Quick <br />is not properly maintained, <br />Installation — no excavation or <br />or the elbow is not securely <br />s <br />special manholes required. <br />p q <br />coupled to the adaptor, a <br />serious spill may result when <br />4� Economical — costs a fraction <br />the OPW 71 SO closes, causing <br />of expensive, complicated and <br />a hazard and environmental <br />contamination. <br />difficult -to -install valves. I' <br />♦ Furnished Complete — supplied <br />with new upper and lower drop tubes, <br />mounting hardware and thorough <br />instructions for quick job site time. <br />�w Completely Automatic Operation <br />— no prechecks to perform, no resets <br />and no overrides to be broken <br />or abused. <br />♦ No Pressurization of the Tank — <br />operates directly from liquid level. <br />NOTE: The OPW 71 SO is <br />designed for use on tight -fill <br />gravity drop applications only. <br />Do not use for pressure <br />Ilkfill applications. <br />♦ Retrofits Directly — for both new <br />and existing tanks with 4" fill risers. <br />• Quick Drain Feature — <br />automatically drains hose when head <br />pressure is relieved. <br />�w Will Accept a Dipstick • Best Flow Rate in The Industry* <br />for Gauging <br />* OPW Test Lab results <br />Advantages of Overfill Prevention <br />Compared to Overfill Warning Systems: <br />♦ Completely Automatic <br />Operation — does not rely on the <br />alertness or speed of response of the <br />delivery attendant for certainty of <br />overfill prevention. <br />�w Keeps the Top of UST "Dry," <br />per EPA Requirements — <br />eliminating possible leaks at loose <br />bung fittings and the need for <br />double containment on vent lines. <br />faster fill times and reducing <br />spill risk. <br />Speeds Delivery Operations <br />— product flows unimpeded into <br />the tank until the hose "kick" that <br />accompanies the valve shut-off <br />provides a clear signal that the <br />liquid has reached the shut-off level. <br />Simple and Inexpensive <br />Installation — in both two-point <br />�w Does Not Rely on Pressure in and coaxial fill applications, no <br />the UST to Stop Flow — allowing additional excavation, manholes or <br />vent piping are required. <br />Look for this label for <br />tm authentic OPW EVR <br />Approved products. <br />r}� OPW 7150M is EVR Approved for E85 <br />