The Valve,negative Pressure Relief, cataloged under National Stock Number 4820-01-044-3254, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-044-3254 |
| Item Name | Valve,negative Pressure Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| General Characteristics Item Description | OPERATING PRESSURE M2 PSI TO 20 PSI; BURST PRESSURE 60 PSI; VALVE SHALL OPEN WITH PRESSURE 0.500 PSI PORM 0.250 PSI; VALVE DESIGNED TO RESIST STICKING DUE TO ICE FORMATION ON THE POPPET; MAX WT 1.000 LB LBS |
| 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 |
|---|---|
| 24P104-1 | 3/2 Design control — primary reference U.S. Government activity |
| 35C-24 | 5/2 Secondary reference U.S. Government activity |
| 16VP038 | 7/2 Vendor item drawing reference U.S. Government activity |
| 4820PL1605373 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 4820-01-044-3254 is a Valve,negative Pressure Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-044-3254: General Characteristics Item Description: OPERATING PRESSURE M2 PSI TO 20 PSI; BURST PRESSURE 60 PSI; VALVE SHALL OPEN WITH PRESSURE 0.500 PSI PORM 0.250 PSI; VALVE DESIGNED TO RESIST STICKING DUE TO ICE FORMATION ON THE POPPET; MAX WT 1.000 LB LBS; End Item Identification: F-16. 1 specification is 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.