OPW 61SOC-4001 60" Coaxial UST Overfill Prevention Valve

The OPW 61SOC-4001 Coaxial UST Overfill Prevention Valve is designed to prevent the overfill of underground storage tanks by providing a positive shut-off of product delivery. 61SOC-4001 is used for coaxial fill applications, tanks equipped with a single product/ vapor return connection. The 61SOC replaces the standard coaxial fill drop tube in a 4" riser fill pipe. The OPW 61SO is a two-stage shut-off valve. When the liquid level rises to about 95% of tank capacity, the valve mechanism is released, closing automatically with the flow. This reduces the flow rate to approximately 5 gpm through a bypass valve. The operator may then stop the filling process and disconnect and drain the delivery hose. As long as the liquid exceeds the 95% level, the valve will close automatically each time delivery is attempted. If the delivery is not stopped and the liquid rises to about 98% of tank capacity, the bypass valve closes completely. No additional liquid can flow into the tank until the level drops below a reset point.