The Valve,safety Relief, cataloged under National Stock Number 4820-01-291-6625, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Emerson Automation Solutions Final Control Us Lp Div Navy Product Team. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-291-6625 |
| Primary Part Number | NMP0970A02S0811 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| NMP0970A02S0811 PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| Reference | Meaning |
|---|---|
| NMP477 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| W903 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| W903 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| NMP0970A2S0811 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| NMP477 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
NSN 4820-01-291-6625 is a Valve,safety Relief, manufactured by Emerson Automation Solutions Final Control Us Lp Div Navy Product Team, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-291-6625 has 1 manufacturer part number on file: NMP0970A02S0811 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
1 possible match (shared part number, not a government interchangeability claim): 7510-01-562-9051. Verify interchangeability with system specifications before substitution.
Key specifications for NMP0970A02S0811: Special Features: END ITEM APPLICATION RELIEF VALVE. 0 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.