The Valve,safety Relief, cataloged under National Stock Number 4820-01-483-1646, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-483-1646 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Operating Pressure | 1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Media for Which Designed | AIR SINGLE RESPONSE |
| 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 |
|---|---|
| S1E10203 | D/9 Drawing number reference only U.S. Government activity |
| S1E10203-01 ITEM 18 | 5/2 Secondary reference U.S. Government activity |
| V3D10423-01 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-483-1646 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 4730-01-483-1651, 4730-01-483-1659, 5360-01-487-7518. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-483-1646: Operating Pressure: 1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Special Features: NHA PRESSURE REDUCING MANIFOLD ASSEMBLY (TOP ASSEMBLY); Media for Which Designed: AIR SINGLE RESPONSE; End Item Identification: MANIFOLD ASSEMBLY; LOS ANGELES CLASS SSN (688). 2 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.