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OPW53VML <br /> December 1988 <br /> a <br /> tt <br /> l r A4tt�•Y <br /> - An OPW 53VML ball float vent- <br /> valve can be located in the vapor <br /> return/extractor fitting of Under- <br /> ` J ground Storage Tanks. <br /> ,r,�t ;, .;; . • When the UST is filled to a predeter- <br /> r% mined level the ball float rises to seat <br /> against the body, restricting vapor flow <br /> ,y�« �, ., ;��'Dr� out of the tank; and reducing delivery <br /> t . d .. "P. <br /> ` '�`,d.G�, 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 V. <br /> Sized for precise control of vapor flow, <br /> yielding true "slow down"delivery <br /> reduction to 31/2-5 gallons per minute. <br /> o 11 <br /> Mro <br /> -r <br /> 0 <br /> / r <br /> � w4 <br /> Eliminate uncalibrated vapor loss, assure proper <br /> ? tr "slow down" effect <br /> � r <br /> C <br /> Counterweight to assure proper alignment and tigh, <br /> shut-off <br /> OPw•Float Vent Valves are coveted under Patent No.3.36.950. Corrosion proof for tight shut-off and long life <br />