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INIPORTANT: OPW products should be used in compliance with applicable federal, <br /> state, provincial,and local laws and regulations.Product selection should be based on <br /> physical specifications and limitations and compatibility with the environment and <br /> materials to be handled. OPW MAKES NO WARRANTY OF FITNESS FOR A <br /> PARTICULAR USE.All illustrations and specifications in this literature are based on the <br /> latest product information available at the time of publication. OPW reserves the right to <br /> make changes at any time in prices,materials, specifications and models and to <br /> discontinue models without notice or obligation. <br /> OPW 53V Ball Float Vent Valves(53VML-0120 53VML-0140 53VML-0160 <br /> 53VML-0180 53VML-0210 53VML-0060 53VML-0065 53VML-0046 53VML-3050 <br /> 53VML-3080 53VML-3110 53VML-3120 53VML-3140 53V IL-3160 53VML-3180) <br /> The OPW 53V Ball Float Vent Valves protrude into underground storage tanks from <br /> OPW 233V(M) Series Extractor Fittings at the Stage I vapor return riser pipe or tank vent <br /> line. During a product delivery, as the tank level rises, a counterweight stainless steel <br /> ball seats on the valve body and restricts flow of vapors back to the transport truck. As <br /> the vapors become compressed in the tank(ullage),product flow into the tank is severely <br /> restricted. The 53V Series Ball Float meets the U.S.EPA 90%requirement for product <br /> flow restriction into underground storage tanks. The 53VML-0046 Ball Float,without <br /> vapor flow orifice, is designed to prevent cross-contamination of product grades with <br /> underground, manifold vent lines. The 53VML-0060 and 53VNIL-0065 are designed as <br /> "back-up"overfill protection for overfill prevention valves, and to minimize product <br /> mixing with underground manifold vent lines. <br /> Table of Contents: <br />