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IMPORTANT: 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 /> a P VV <br /> OPW 30MV Series Ball Float Vent Valves(30MV-2070 30MV-2090 30MV-2110 <br /> 30MV-2120 30W-2140 30MV-2170 30V-2095 30V-2125 30V-2145 30MV-3080 <br /> 30MV-3110 30MV-3120 30MV-3140 30MV-3160 30MV-3180 30MV-3210) <br /> The OPW 30MV Ball Float Vent Valves protrude into underground storage tanks from <br /> OPW 233 Series Extractor Fittings at the Stage I vapor return riser pipe or tank vent line. <br /> During a product delivery, as the tank level rises, a counterweight stainless steel ball seats <br /> on the valve body and restricts flow of vapors back to the transport truck. As the vapors <br /> become compressed in the tank (ullage),product flow into the tank is severely restricted. <br /> The 30MV Series Ball Float meets the U.S. EPA 30-minute warning requirement for <br /> product flow restriction into underground storage tanks. The 30MV allows for higher <br /> storage capacity in larger volume tanks. The cage assembly is sealed to the valve body <br /> and a precision-machined vapor flow orifice ensures precise compression and"slow- <br /> down"of the product flow into the tank. <br /> Table of Contents: <br /> 1. Features <br />