The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-409-2549, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-409-2549 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Valve Stem Design | SINGLE SEAT |
| Second End Relationship with First End | IDENTICAL |
| Body Style | ANGLE |
| Regulation Type | AUTOMATIC SINGLE STAGE |
| First End Style Designator | RAISED |
| Temp Rating | 600.0 FAHRENHEIT NOMINAL DEGF |
| First Connection Face to Centerline Distance | 4.875 INCHES NOMINAL IN |
| End Connection Quantity | 2 |
| Outlet Pressure Range | 150.0 TO 350.0 CAMERA MOUNT |
| Valve Loading Method | SPRING |
| Second Connection Face to Centerline Distance | 5.156 INCHES NOMINAL IN |
| First End Connection Type | RAISED FACE FLANGE |
| First End Flange Shape Style | ROUND W/ BOLT HOLES |
| Material | STEEL CORROSION RESISTING SEAT |
| Maximum Inlet Pressure Rating | ERR-060 |
| Filter | NOT INCLUDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 8B4-5S17-7G000000B | 5/9 Secondary reference U.S. Government activity |
| 8B4-5S17-7G000000C | 3/2 Design control — primary reference U.S. Government activity |
| 8B4-5S17-7G000000A | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-409-2549 is a Valve,regulating,fluid Pressure, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-409-2549: Flow Control Device: POPPET; Valve Stem Design: SINGLE SEAT; Second End Relationship with First End: IDENTICAL; Body Style: ANGLE. 17 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.