Watson McDaniel B-19-F125-4-V Direct-Operated Pressure Regulators (Liquid & Gas), Cast Iron Body, 1 - 12 PSIG, Viton Disc, 125# Flange
Custom quote, volume pricing, or Net 30 terms available.
Request a Formal Quote or call 888-825-8800Technical Specifications
General
| Model | B-Series |
|---|---|
| Service | Water, Air, Oil, Other Gases & Liquids |
| Sizes | 3" - 4" |
| Part Number | B-19-F125-4-V |
| Brand | Watson McDaniel |
| Manufacturer Part # | B-19-F125-4-V |
| Size | 3" |
| Country of Origin | Made in the United States |
Materials & Construction
| Body Material | 1/2" - 2" (Bronze & Stainless Steel) |
|---|---|
| Disc & Diaphragm | Viton - 300°F Max |
Performance
| Max Inlet Pressure | 250 PSIG |
|---|---|
| Min Inlet Pressure | 10 PSIG |
| Max Differential Pressure | 125 PSI |
| Min Differential Pressure | 20% of Inlet Pressure |
| Design Pressure/Temperature Rating – PMA/TMA | NPT 250 PSIG @ 400°F |
Connections
| Connections | NPT, 125# FLG, 250# FLG, 300# FLG |
|---|
Overview
Watson McDaniel B-19-F125-4-V Direct-Operated Pressure Regulators, 1 - 12 PSIG For Liquid & Gas (3" 125# Flange)
Features:
- Diaphragm, disc and cup packing in Viton for 300°F 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.
Options & Features (See Specification Sheet For Full List):
B- Series Direct-Operated Pressure Regulating Valves (For Liquid & Gas)
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 455-Series reduces downstream pressure of steam, air, or other gases. The 455-Series is installed using an external sensing line which is connected several feet downstream of the valve outlet. Downstream pressure is set by turning an adjustment screw that increases or decreases spring force on a diaphragm. The downstream pressure applies a force to the diaphragm to compress the adjustment spring. When the system pressure equals the set point, the diaphragm moves downward against the adjustment spring force closing the valve.
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.
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.
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.
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)
