2" Watson McDaniel 455-17-F300-61 Direct-Operated Pressure Regulating Valve (For Steam), Stainless Steel Body, 40 - 70 PSIG, Viton Diaphragm, 300# Flange
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Request a Formal Quote or call 888-825-8800Technical Specifications
General
| Model | 455 Series |
|---|---|
| Service | Steam, Water, Air & Other Gases |
| Sizes | 1/2" - 4" |
| Diaphragm | Viton |
| Part Number | 455-17-F300-61 |
| Brand | Watson McDaniel |
| Manufacturer Part # | 455-17-F300-61 |
| Size | 2" |
| Country of Origin | Made in the United States |
Materials & Construction
| Body Material | 1/2"- 2" SS Body/Brass Stuffing Box |
|---|---|
| Seat & Disc | Stainless Steel |
Performance
| Max Inlet Pressure | 250 PSIG |
|---|---|
| Min Inlet Pressure | 5 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 |
|---|
Overview
Watson McDaniel 455-17-F300-61 Direct-Operated Pressure Regulator, 40 - 70 PSIG For Steam (2" 300# Flange)
Features:
- Operates with minimum inlet pressure of 5 PSIG.
- Stainless Steel Internals
- Excellent for use in steam systems that contain excessive amounts of pipe scale and other contaminants.
- Pressure balanced valve & seat for more precise control of downstream pressure.
Options & Features (See Specification Sheet For Full List):
455 Direct-Operated Pressure Regulating Valves (For Steam)
The 455-Series Direct-Operated Pressure Regulator is ideally suited for reducing pressure in steam applications and requires only 5 PSIG minimum inlet pressure. Recommended for use in steam systems that contain excessive amounts of pipe scale and other contaminants that may cause failure in pilot-operated regulators.
Steam: The 455-Series, available with Bronze and Cast Iron bodies, are ideally suited for reducing pressure in STEAM applications and requires only 5 PSIG minimum inlet pressure. Excellent for use in steam systems that contain large amounts of scale that may cause failure in pilot-operated regulators.
The 455 Series Direct-Operated Pressure Regulating Valves are used for pressure reduction applications on steam, air and other gases. Balanced seat and disc design allows these valves to be used in applications with low inlet pressure; down to 5 PSIG. Unlike pilot-operated valves, the 455 does not contain any small pilot orifices and are therefore less susceptible to issues caused by dirt and pipe scale. The 455-Series is installed using an external sensing line which is connected several feet downstream of the valve. Placing the pressure sensing location out of range of valve discharge turbulence makes it more accurate in controlling downstream pressure.
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.
Design Features
The 455-Series features a rugged stainless steel balanced seat and disc design allowing these valves to be used in applications with low inlet pressure; down to 5 PSIG. The 455-Series does not contain any small pilot orifices and are therefore less susceptible to issues caused by dirt and pipe scale, that may adversely effect pilot-operated regulators.
Selection / Sizing / Capacities
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: 1000 lbs/hr of 20 PSIG Steam reduced to 5 PSIG.
- Model Code: 455-16-N-65 (455-Series, 11/2" NPT, 1-6 PSIG Spring Range)
