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T. <br /> 0-N Fr <br /> Or N F,� G 1''S() <br /> ! 4-,:-�r r F F'A\rr- <br /> The OPW 61-SO overfill prevention <br /> valve is designed to be a simple,low ■ Simple,easy and quick installation-no <br /> cost solution to positive shut-off of excavation or special manholes required. <br /> product fill for underground storage ■ Economical-costs a fraction of expensive, <br /> tanks.The shut-off valve is an integral complicated and difficult to install valves. <br /> part of the 4"drop tube used for ■ Completely automatic operation-no pre <br /> expensive excavation is required.The <br /> submerged filling. No extensive or checks to perform,no resets,no overrides to <br /> OPW 61-SO can easily be retrofit into be broken e abused. <br /> existing locations. No special manholes p ■ Works at all flow rates-operates directly from <br /> are required. Installing the OPW 61-SO liquid level. <br /> is as simple as changing drop tubes. ■ Will accept a dipstick for gauging. <br /> The OPW 61-SO is a two stage shut- ■ Retrofits directly-for existing tanks and 4" <br /> off valve.When liquid level rises to riser pipes. <br /> level A the valve mechanism is released <br /> and the valve closes automatically uto■ Automatic hose drain-for operator con <br /> - <br /> with <br /> A <br /> with the flow.This reduces the flow venic t <br /> rate to approximately 5 gpm through ' N <br /> a bypass valve. The operator may y <br /> then stop the filling process,discon- Actuating Float <br /> nect and drain the delivery hose.As <br /> long as the liquid level exceeds A,the <br /> valve will close automatically each <br /> time delivery is attempted. " <br /> If the storage tank is overfilled to an <br /> unsafe condition and the liquid rises Positive <br /> to level B,the bypass valve closes. Shut-Off Valve <br /> No additional liquid will flow into the OPW 1 <br /> Spill Container <br /> tank until the level drops below a <br /> reset point. <br /> ° o ° o 0 0 00 <br /> Patent No.4,667,711 �J <br /> Other patents pending <br /> The OPW 61-SO is furnished with complete <br /> instructions and hardware for field or shop 31/2 ,min. <br /> assembly. <br /> For complete assembly and installation — LEVEL"B <br /> instructions, refer to C-3557-PA. <br /> LEVEL"A' <br /> Materials <br /> Valve body: cast aluminum ave ,min. <br /> Float: nitrile rubber, closed cell foam <br /> Valve: aluminum <br /> Seals: viton <br /> Upper and Lower Drop Tube: aluminum <br /> Engineering Data 6 or per <br /> Maximum bur depth 5 feet local requirements <br /> Y P Underground Tank,typical <br /> Maximum tank diameter:8 feet <br /> SIZE:4" 61-SO-4000 WT.: 15lbs. <br /> 19 �- <br />