3" Watson McDaniel 403-19-F300-1409-R Piston-Actuated Pressure Regulating (For Steam & Gas), Ductile Iron Body, Double Spring, 30 - 125 PSIG Remote Sensing, Pilot-Operated, 300# Flange
Custom quote, volume pricing, or Net 30 terms available.
Request a Formal Quote or call 888-825-8800Technical Specifications
General
| Model | 403 Series |
|---|---|
| Service | Steam & Air |
| Sizes | 1/2" - 4" |
| Part Number | 403-19-F300-1409-R |
| Brand | Watson McDaniel |
| Manufacturer Part # | 403-19-F300-1409-R |
| Size | 3" |
| Country of Origin | Made in the United States |
Materials & Construction
| Body Material | Ductile Iron |
|---|---|
| Seat & Disc | Hardened 420 Stainless Steel (55 Rc) |
Performance
| Max Inlet Pressure | 450 PSIG |
|---|---|
| Min Inlet Pressure | 20 PSIG |
| Max Differential Pressure | 250 PSI |
| Min Differential Pressure | 15% of Inlet Pressure (10 PSI min) |
Connections
| Connections | NPT, 150# FLG, 300# FLG |
|---|
Overview
Watson McDaniel 403-19-F300-1409-R Piston-Actuated Pressure Regulating Valve, Double Spring, 30 - 125 PSIG Remote Sensing (3" 300# Flange)
Features:
- Pilot-operated regulators minimize outlet pressure fluctuations even when load varies.
- Internal Sensing option (If requested, the regulator can be modified to internally sense pressure, eliminating the need for an external sensing line).
- Ductile Iron body to handle increased pressure and temperature.
- Hardened stainless steel seat and disc (55 RC).
Options & Features (See Specification Sheet For Full List):
403 Piston-Actuated Pilot-Operated (For Steam & Gas)
The 403 Piston-Actuated Pressure Regulating are pilot-operated, piston-actuated, pressure regulators primarily used for reducing pressure in STEAM systems. These regulators can be equipped with an optional internal sensing line which simplifies installation (Suffix I). The 403 Series has all stainless steel internals for high-pressure applications up to 450 PSIG. Double Spring Option is available for wider range of reduced pressures.
Steam: The 403 Series pilot-operated (Piston-Actuated) pressure regulating valves are used for pressure reduction on steam mains and other process equipment. Piston-actuated regulators are more compact than Diaphragm-actuated regulators. The 403 Series has a Ductile Iron body but contains all stainless steel internals for high-pressure applications up to 450 PSIG.
Gas/Air: The 403 Series pilot-operated (Piston-Actuated) pressure regulating valves are used for pressure reduction on steam mains and other process equipment. Piston-actuated regulators are more compact than Diaphragm-actuated regulators. The 403 Series has a Ductile Iron body but contains all stainless steel internals for high-pressure applications up to 450 PSIG.
The 403 Series Pilot-Operated (Piston-Actuated) pressure regulating valves are used for pressure reduction on steam mains and other process equipment. Pilot-operated regulators will maintain a constant and accurate downstream pressure regardless of fluctuations in supply pressure or usage. These regulators can be supplied with an optional internal sensing line which simplifies installation. Piston-actuated regulators are more compact than Diaphragm-actuated regulators. The 403 Series contains all stainless steel internals for high-pressure applications up to 450 PSIG. The Double-Spring option is available for a wider range of reduced pressures
Selection / Sizing / Capacities
From the Capacity chart, find the inlet pressure and required regulator outlet pressure. Follow across chart to nearest capacity (Steam, 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. Specify Internal or External (Remote) Pressure sensing.
Example:
- Application: 12,500 lbs/hr of 300 PSIG Steam reduced to 125 PSIG
- Model Code: 403-17-N-0010-R (2" 403 Series Valve, 100-200 PSIG spring range, with external sensing.
