The Valve,safety Relief, cataloged under National Stock Number 4820-01-194-7906, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is English Electric Corp. Government technical data includes 2 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-194-7906 |
| Primary Part Number | RW1/820453 1 1/2IN 30PSI |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | English Electric Corp |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Opening Pressure Setting | 30.0 POUNDS PER SQUARE INCH LBS |
| 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 |
|---|---|
| RW1/820453 1 1/2IN 30PSI PRIMARY | English Electric Corp (USA) |
| Reference | Meaning |
|---|---|
| RW1/820453 | C/1 Advisory reference — outside the item-of-supply concept David Brown Gear Systems Limited |
| RW-820453-A1-RW1/820453 | 5/9 Secondary reference Brown David Vehicle Products Ltd |
| RW-820453-A1-RW1/820453 | 5/9 Secondary reference David Brown Special Products Ltd |
| RW1/820453 | 5/9 Secondary reference Brown David Vehicle Products Ltd |
NSN 4820-01-194-7906 is a Valve,safety Relief, manufactured by English Electric Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-194-7906 has 1 manufacturer part number on file: RW1/820453 1 1/2IN 30PSI (English Electric Corp).
Key specifications for RW1/820453 1 1/2IN 30PSI: Flow Control Device: DISK; Opening Pressure Setting: 30.0 POUNDS PER SQUARE INCH LBS. 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.