The Smith Meter Model 210 Valve is a Smith Meter 200 Series Valve with two solenoid controls. The normally-open (N.O.) and normally-closed (N.C.) solenoids, located in the upstream and downstream portions of the control loop, respectively, control the operation of the valve. With both solenoids energized, high upstream pressure is blocked allowing the product in the cover to vent to low downstream pressure, opening the main valve. Conversely, de-energizing both solenoids allows high upstream pressure to close the valve.