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B-Series (for Gas)

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.

Example
Application: 35 GPM of 70 PSIG Water reduced to 20 PSIG

Model Code: B-14-N-3-V ( B-Series, 1” NPT, 5-35 PSIG spring range)

Find the inlet pressure: 70 PSIG
Next find the required regulator outlet Pressure: 20 PSIG (30)
Follow across to the nearest capacity (Water) that meets or slightly exceeds demand requirements: 35 GPM (38)
Follow vertically up to determine appropriate size: 1”
To determine actual full model code see model code chart below


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.

Air, Gases: 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.

Size Connection PMO (PSIG) Max Capacity
1/2" - 4" NPT, FLG(125,250) 10-250 Gases - 12,880 SCFM.

ModelSizeTypeReduced Pressure Range (psig)Body MaterialMax Inlet Pressure (psig)Capacity (scfm)
B-12-N-4-V1/2"NPT0 - 12Bronze250
B-12-N-3-V1/2"NPT5 - 35Bronze250
B-12-N-2-V1/2"NPT20 - 70Bronze250
B-12-N-1-V1/2"NPT40 - 125Bronze250
B-13-N-4-V3/4"NPT0 - 12Bronze250
B-13-N-3-V3/4"NPT5 - 35Bronze250
B-13-N-2-V3/4"NPT20 - 70Bronze250
B-13-N-1-V3/4"NPT40 - 125Bronze250
B-14-N-4-V1"NPTBronze250
B-14-N-2-V1"NPT20 - 70Bronze250
B-14-N-1-V1"NPT40 - 125Bronze250
B-15-N-3-V1 1/4"NPT5 - 35Bronze250
B-15-N-2-V1 1/4"NPT20 - 70Bronze250
B-15-N-1-V1 1/4"NPT40 - 125Bronze250
B-16-N-3-V1 1/2"NPT5 - 35Bronze250
B-16-N-2-V1 1/2"NPT20 - 70Bronze250
B-16-N-1-V1 1/2"NPT40 - 125Bronze250
B-17-N-3-V2"NPT5 - 35Bronze250
B-17-N-2-V2"NPT20 - 70Bronze250
B-17-N-1-V2"NPT40 - 125Bronze250
B-18-N-3-V2 1/2"NPT5 - 35Bronze250
B-18-N-2-V2 1/2"NPT20 - 70Bronze250
B-18-N-1-V2 1/2"NPT40 - 125Bronze250
B-19-F125-3-V3"125# FLG5 - 35Iron Body250
B-19-F125-2-V3"125# FLG20 - 70Iron Body250
B-19-F125-1-V3"125# FLG40 - 125Iron Body250
B-19-F250-3-V3"250# FLG5 - 35Iron Body250
B-19-F250-2-V3"250# FLG20 - 70Iron Body250
B-19-F250-1-V3"250# FLG40 - 125Iron Body250
B-20-F125-3-V4"125# FLG5 - 35Iron Body250
B-20-F125-2-V4"125# FLG20 - 70Iron Body250
B-20-F125-1-V4"125# FLG40 - 125Iron Body250
B-20-F250-3-V4"250# FLG5 - 35Iron Body250
B-20-F250-2-V4"250# FLG20 - 70Iron Body250
B-20-F250-1-V4"250# FLG40 - 125Iron Body250
B-14-N-4-V1"NPTBronze250
B-14-N-3-V1"NPT250
Product Overview
The B-Series direct-operated pressure regulators with balanced valve trim are used for reducing pressure in air and water systems. These regulators are commonly found in industrial plants, apartment buildings, water supply systems, schools and underground water distribution systems. The soft-seated elastomeric Viton disc has an operating temperature up to 300°F and will produce a Class V shutoff. No external sensing line is required with this style of regulator.
Features
• Diaphragm, disc and cup packing in Viton for 300ºF service
• Balanced pressure regulator allows accurate control even when incoming pressure fluctuates
•Valve has a Class V shut-off rating due to the “soft-seated” Viton disc
Selection / Sizing / Capacities
From the Capacity chart, find the inlet pressure and required regulator outlet pressure. Follow across chart to nearest capacity (water, air) 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.

Example:
Application: 35 GPM of 70 PSIG Water reduced to 20 PSIG
Model Code: B-14-N-3-V (B-Series,1” NPT, 5-35 PSIG spring range)
Dimension and Weights