Flow Coefficient (Cv) for the 0818 Series Gate Valves.

Flow Coefficient (Cv) for the 0818 Series Gate Valves.

The chart below provides the Flow Coefficient (Cv) for the 0818 No Lead Brass Gate Valves. Flow Coefficient (Cv) is the number of U.S. gallons that can pass through a valve when it is in the fully opened position at a pressure drop of 1 PSI. Testing is typically done by running water (specific gravity of 1.0 centistoke viscosity) at 60°F (°C) unless stated otherwise.