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0 <br />Materials , <br />Valve body: Cast aluminum <br />Float: Nitrile rubber, closed cell foam <br />Valve: Aluminum <br />Seals: Viton" <br />Upper & lower Drop Tube: Aluminum <br />Plastic parts: Acetal <br />Hardware: Stainless steel <br />Features <br />♦ Simple, Easy and Quick Installation <br />— no excavation or special manholes <br />required. <br />♦ Economical — costs a fraction of <br />expensive, complicated and difficult - <br />to -install valves. <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 />♦ Completely Automatic Operation — no <br />prechecks to perform, no resets and no <br />overrides to be broken or abused. <br />Important <br />In order to prevent product <br />spillage from the Underground <br />Storage Tank (UST), properly <br />maintained delivery equipment <br />and a proper connection at the <br />tight -fill adaptor are essential. <br />Delivery personnel should be <br />managed and trained to inspect <br />delivery elbows and hoses for <br />damaged and missing parts. <br />They should always make <br />certain there is a positive <br />connection between the adaptor <br />and elbow. If delivery equipment <br />is not properly maintained, or the <br />elbow is not securely coupled <br />to the adaptor, a serious spill <br />may result when the OPW 71 SO <br />closes, causing a hazard and <br />environmental contamination. <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 fill <br />applications. <br />♦ Retrofits Directly — for both new and <br />existing tanks with 4" fill risers. <br />♦ Quick Drain Feature — automatically <br />♦ No Pressurization of the Tank — drains hose when head pressure is <br />operates directly from liquid level. relieved. <br />♦ Will Accept a Dipstick for Gauging ♦ Best Flow Rate in The Industry" <br />Test -witnessed by Bowser-Morner, Inc., an independent laboratory. Results available upon <br />request. <br />Advantages of Overfill Prevention <br />Compared to Overfill Warning Systems: <br />♦ Completely Automatic Operation <br />— does not rely on the alertness or <br />speed of response of the delivery <br />attendant for certainty of overfill <br />prevention. <br />♦ Keeps the Top of UST "Dry," per <br />EPA Requirements — eliminating <br />possible leaks at loose bung fittings <br />and the need for double containment <br />on vent lines. <br />♦ Does Not Rely on Pressure in the <br />UST to Stop Flow — allowing faster fill <br />times and reducing spill risk. <br />Listings and <br />Certifications <br />♦ Speeds Delivery Operations — <br />product flows unimpeded into the tank <br />until the hose "kick' that accompanies <br />the valve shut-off provides a clear <br />signal that the liquid has reached the <br />shut-off level. <br />♦ Simple and Inexpensive Installation — <br />in both two-point and coaxial fill <br />applications, no additional excavation, <br />manholes or vent piping are required. <br />® <br />p Look for this label for <br />ULi1W1 authentic OPW EVR <br />California Air <br />Approved products. <br />Resources Board <br />a70cwo <br />OPW 71 SO Overfill <br />Prevention Valves <br />The CARB-certified OPW 71 SO <br />vapor -tight Overfill Prevention Valvt <br />is designed to prevent the overfill o <br />underground storage tanks by prov <br />a positive shut-off of product delive <br />The shut-off valve is an integral pari <br />the drop tube used for gravity filling.' <br />OPW 71 SO allows easy installation <br />(without breaking concrete) and reqt <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 capacity, <br />the valve mechanism is released, <br />closing automatically with the flow. This <br />reduces the flow rate to approximately <br />5 gpm through a bypass valve. The <br />operator may then stop the filling <br />process and disconnect and drain the <br />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 <br />the 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 />71SO Instruction Sheet Order <br />Number: H15524PA <br />O P W <br />A�COMPANY e <br />117 <br />