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OPW53VML <br /> December 1988 <br /> j <br /> IMF 7 <br /> ' 31 <br /> ' ay <br /> - An OPW 53VML ball float vent- <br /> valve can be located in the vapor <br /> - <br /> return/extractor fitting of Under- <br /> ground Storage Tanks. <br /> x When the UST is filled to a predeter- <br /> s`, s mined level, the ball float rises to seat <br /> w ter l{ <br /> against the body, restricting vapor flow <br /> � 41 ► a <br /> out of the tank and reducing delivery <br /> �.r re9 <br /> flow rate dramatically. <br /> Only the OPW 53VML has these unique <br /> features to provide consistent performance <br /> Black for easy identification and long service life. <br /> Corrosion free for long life <br /> and tight shut-off ' <br /> Sized for precise control of vapor flow, <br /> yielding true "slow down"delivery <br /> reduction to 31/2-5 gallons per minute. <br /> ter,"y I <br /> 4'T <br /> T Eliminate uncalibrated vapor loss, assure proper <br /> +r "slow down" effect <br /> i <br /> Counterweight to assure proper alignment and tight <br /> shut-off <br /> OPw•Float Vent Valves are covered under Patent No.3,736.950. Corrosion proof for tight shut-off and long life <br />