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B-Series Regulators The B-Series Pressure regulators are primarily used for reducing pressure in water systems. Also suitable for air, oil, and other liquids or gasses. The B-Series offers much higher capacities than the O-Series. These regulators are commonly found in industrial plants, apartment buildings, schools, and water distribution and supply systems.
Controlling Pressure The B-Series valve reduces downstream pressure of water or gas. This valve does not require an external sensing line and maintains downstream pressure regardless of inlet pressure. Downstream pressure is set by turning an adjustment screw that increases or decreases spring force above a diaphragm to compress the adjustment spring. When the system pressure equals the set point, the diaphragm moves upward against the adjustment spring force closing the valve.
Design Features The B-Series regulator has a balanced valve trim allowing accurate control even when incoming pressure fluctuates. The B-Series features a soft-seated elastomeric Viton disc that has an operating temperature up to 300°F and will produce a class V shutoff. Viton Diaphragm, disc and cup packing are rated for 300°F service.
How To Size for B-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 B-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.
Water, Oil, other Liquids : The B-Series is primarily used for reducing pressure in WATER systems. Available with Bronze and Cast Iron Bodies. The B-Series offers higher capacity than the O-Series.