The Piston,valve, cataloged under National Stock Number 4820-01-514-2374, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Chemetron Fire Systems. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-514-2374 |
| Primary Part Number | 3-061-1191 |
| Item Name | Piston,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Chemetron Fire Systems |
| Status | ACTIVE |
| Valve Type for Which Designed | RELIEF |
| Valve Model Number for Which Designed | FM200 |
| Valve Design Control Activity | 1CSX7 |
| 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 |
|---|---|
| 3-061-1191 PRIMARY | Chemetron Fire Systems (USA) |
| D1-061-0945 ITEM 17 | Chemetron Fire Systems (USA) |
| B3-061-1191 REV A | Chemetron Fire Systems (USA) |
| Reference | Meaning |
|---|---|
| D1-061-0945 | D/9 Drawing number reference only Chemetron Fire Systems |
NSN 4820-01-514-2374 is a Piston,valve, manufactured by Chemetron Fire Systems, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-514-2374 has 3 manufacturer part numbers on file: 3-061-1191 (Chemetron Fire Systems), D1-061-0945 ITEM 17 (Chemetron Fire Systems), B3-061-1191 REV A (Chemetron Fire Systems).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-514-2382, 4820-01-514-2759. Verify interchangeability with system specifications before substitution.
Key specifications for 3-061-1191: Valve Type for Which Designed: RELIEF; Valve Model Number for Which Designed: FM200; Special Features: NHA VALVE,RELIEF,600 PSI; Valve Design Control Activity: 1CSX7. 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.