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Features <br /> Stainless Steel Counterweight Ball Float—Corrosion-resistant for a long service <br /> life. Counterweight ensures proper seating of the ball for precision"slow-down" <br /> of product flow into the tank. <br /> Precision Machined Vapor Flow Orifice - Assures precise"slow-down"of the <br /> delivery flow rate. <br /> Vapor-Tight Cage-to Extractor Fitting - for precision vapor compression. <br /> Duragard® Body Coating-Helps prevent rust and corrosion build-up for a <br /> smooth seating surface and long service life. <br /> Various Body Lengths- Accommodate virtually any size tank. <br /> 2"and 3" Body Sizes—3" size increases vapor flow to reduce product delivery <br /> time. <br /> Easy Installation, Service and Testing-Both 2" and 3" valves install in OPW 233 <br /> Extractor Fittings and are easily removed for inspection or tank testing with OPW <br /> 89 Extractor Wrench. <br /> Materials <br /> Pipe Nipple: steel <br /> Coating: black Duragard® <br /> Spring: stainless steel <br /> Ball: stainless steel <br /> Warning <br /> OPW Overfill Warning Systems should only be used on submerged pumping systems, <br /> not suction pump systems. OPW Overfill Warning Systems should only be used on <br /> Gravity Drop systems. DO NOT use where Pump Off Unloading is used. <br />