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- 455 Piston
455 Series Regulator
455 Piston
Specifications
| Model | 455 Series Piston-Actuated Pilot-Operated |
| Service | Steam, Air & Other Gases |
| Sizes | 1/2’’ – 4’’ |
| Connections | NPT, 125# FLG, 250# FLG |
| Body Material | ½” – 1 ½” SS Body/Brass Stuffing Box
2”- 4” Cast Iron |
| Seat & Disc | Stainless Steel |
| Diaphragm | Neoprene/Nylon |
| Max. Inlet Pressure | 250 PSIG |
| Min. Inlet Pressure | 5 PSIG |
| Max. Differential Pressure | 125 PSI |
| Min. Differential Pressure | 20% of Inlet Pressure |
Contact Us for more information on this product and to see other sizes that fit unique applications.
Typical Applications
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 allow 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.