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- 403 Piston
403 Series Regulator
403 Piston
Specifications
| Model | 403 Series (External & Internal) |
| Service | Steam & Air |
| Sizes | 1/2’’ – 4’’ |
| Connections | NPT, 150# FLG, 300# FLG |
| Body Material | Ductile Iron |
| Seat & Disc | Hardened 420 Stainless Steel (55 Rc) |
| Max. Inlet Pressure | 450 PSIG |
| Min. Inlet Pressure | 20 PSIG |
| Max. Differential Pressure | 250 PSI |
| Min. Differential Pressure | 15% of Inlet Pressure (10 PSI Minimum) |
Contact Us for more information on this product and to see other sizes that fit unique applications.
Typical Applications
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.
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