The Valve,safety Relief, cataloged under National Stock Number 4820-01-190-5849, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-190-5849 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | DISKDISK |
| Criticality Code Justification | ZZZYZZZY |
| Valve Size | 3.000 INCHES3.000 INCHES IN |
| First Connection Face to Centerline Distance | 5.500 INCHES IN |
| Material | COPPER ALLOY 922 BODY |
| Material | NICKEL ALLOY BODY LINING |
| Valve Operation Method | AUTOMATICAUTOMATIC |
| Nominal Thickness | 0.500 INCHES FIRST END IN |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | C |
| Reference | Meaning |
|---|---|
| S4824-3129346,ASSY | 5/1 Secondary reference U.S. Government activity |
| L-2210-C | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| L-2210-C,3 IN | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| NMP-151 | 3/9 Design control — primary reference Kunkle Industries Inc Lonergan Valve Div |
NSN 4820-01-190-5849 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-464-3354. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-190-5849: Flow Control Device: DISKDISK; Criticality Code Justification: ZZZYZZZY; Valve Size: 3.000 INCHES3.000 INCHES IN; First Connection Face to Centerline Distance: 5.500 INCHES IN. 9 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.
NSN 4820-01-190-5849 has DEMIL Code F. Demilitarization may be required before disposal or transfer to non-military entities.
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.