The Defender Series® overfill prevention valve (OPV) is a self contained two-stage positive shut-off valve that prevents the overfill of an underground storage tank (UST) during a gravity-fed product deliver. The valve employs a revolutionary magnetically-coupled actuator system to provide positive shutoff. This unique method of shutoff eliminates any penetrations in the valve, making it both vapor and leak tight. It provides safe, rapid, and reliable fuel drops fit the broadest range of fuel applications and environmental conditions. Simple to install, service and test remotely, the Defender Series® OPV is the industry's most versatile overfill prevention valve.-10 ft.
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