The Seat,valve, cataloged under National Stock Number 4820-01-154-8025, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Seat,valve |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-154-8025 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Reference | Meaning |
|---|---|
| 134B243AYP1&PL | C/1 Advisory reference — outside the item-of-supply concept General Electric Company |
| 501E457AA | D/9 Drawing number reference only General Electric Company |
| 501E457AA PIECE 92 | 5/9 Secondary reference General Electric Company |
| 134B243AY PIECE 1 | 5/9 Secondary reference General Electric Company |
| 134B243AY-1 | 3/9 Design control — primary reference Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
| 134B243AYP1 AND PL | 5/9 Secondary reference General Electric Company |
| 134B243AYP1 AND PL | 5/9 Secondary reference General Electric Co Naval and Drive Turbine Systems Dept |
| 134B243AY-1 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
NSN 4820-01-154-8025 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 5340-01-160-3585, 4820-01-164-6998, 3040-01-179-3042. Verify interchangeability with system specifications before substitution.
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.