The Valve,safety Relief, cataloged under National Stock Number 4820-01-221-1576, 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. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-221-1576 |
| Primary Part Number | LL3112B NMP409 3 |
| 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 |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Renewable Seat Ring Type | BOLTED |
| Connection Type | FLANGE ALL ENDS |
| Valve Size | 0.750 INCHES IN |
| Adjustable Pressure Range | +376.0 TO 400.0 POUNDS PER SQUARE INCH LBS |
| Material | STEEL OVERALL |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| LL3112B NMP409 3 PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| CNCPP10CDD PRIMARY | Dante Valve Company (USA) |
| Reference | Meaning |
|---|---|
| LL3112B NMP409 376T400PSI | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| CNCPP10CDD | 5/9 Secondary reference Danco Valve Company |
| LL3112B NMP409 376T400PSI | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| DX62-.75-000 | 5/9 Secondary reference Danco Valve Company |
NSN 4820-01-221-1576 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 4820-01-221-1576 has 2 manufacturer part numbers on file: LL3112B NMP409 3 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), CNCPP10CDD (Dante Valve Company).
Key specifications for LL3112B NMP409 3: Flange Shape: ROUND WITH HOLES ALL ENDS; Renewable Seat Ring Type: BOLTED; Connection Type: FLANGE ALL ENDS; Valve Size: 0.750 INCHES IN. 7 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.