How To Size for 403-Series
From the Capacity chart, find the inlet pressure and required regulator outlet pressure. Follow across chart to nearest capacity (steam) that meets or
slightly exceeds demand requirements. Follow vertically up to determine appropriate size. When exact application values are not shown, interpolate
between values. From the spring range chart, select the spring range that accommodates the required outlet set pressure.
Must Specify Spring Code when Ordering:
Use the 403 Series Spring Selection Table to specify the
proper spring(s) based on valve size and reduced pressure
range by Replacing the "X" with Spring Code from chart.