The Valve,safety Relief, cataloged under National Stock Number 4820-01-397-7864, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Vapor Power International, Llc. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-397-7864 |
| Primary Part Number | 49920151-05 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Vapor Power International, Llc |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Media for Which Designed | WATER, FRESH SINGLE RESPONSE |
| 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 |
|---|---|
| 49920151-05 PRIMARY | Vapor Power International, Llc (USA) |
| Reference | Meaning |
|---|---|
| 49920151-05 | 3/9 Design control — primary reference U.S. Government activity |
| 45423705-02 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-397-7864 is a Valve,safety Relief, manufactured by Vapor Power International, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-397-7864 has 1 manufacturer part number on file: 49920151-05 (Vapor Power International, Llc).
Key specifications for 49920151-05: Flow Control Device: DISK; Media for Which Designed: WATER, FRESH SINGLE RESPONSE; Valve Operation Method: AUTOMATIC. 3 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.