The Valve,safety Relief, cataloged under National Stock Number 4820-01-514-1830, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Chemetron Fire Systems. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Chemetron Fire Systems (CAGE 1CSX7) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-514-1830 |
| Primary Part Number | 1-061-0945 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Chemetron Fire Systems |
| 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 |
|---|---|
| 1-061-0945 PRIMARY | Chemetron Fire Systems (USA) |
| C-53920 ITEM 2 | Chemetron Fire Systems (USA) |
| D1-061-0945 REV C | Chemetron Fire Systems (USA) |
| Reference | Meaning |
|---|---|
| C-53920 | D/9 Drawing number reference only Chemetron Fire Systems |
NSN 4820-01-514-1830 is a Valve,safety Relief, manufactured by Chemetron Fire Systems, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-514-1830 has 3 manufacturer part numbers on file: 1-061-0945 (Chemetron Fire Systems), C-53920 ITEM 2 (Chemetron Fire Systems), D1-061-0945 REV C (Chemetron Fire Systems).
Key specifications for 1-061-0945: Special Features: MODEL FM200,CLASS I SERVICE. 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.