The DN15 - DN200 size range includes valves with diameters ranging from 1/2 inch to 8 inches, providing for a wide range of flow capacities. The pressure rating of the Fleyenda 2PC Stainless Steel Ball Valve is 500Class (500 psi). Depending on your needs, other grades of stainless steel, such as 304 or 316, may be available. Welcome to the world of the custom manual valve!