The Servovalve,hydraulic, cataloged under National Stock Number 1650-01-471-4978, is classified within Federal Supply Class 1650 (Aircraft Hydraulic, Vacuum, and De-icing System Components) of the Aircraft Components and Accessories group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1650-01-471-4978 |
| Item Name | Servovalve,hydraulic |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Status | ACTIVE |
| Port Quantity | 4 |
| Operating Pressure | 4000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Body Material | STEEL CORROSION RESISTING |
| Operating Temp Rating | -65.0 FAHRENHEIT MINIMUM AND 275.0 FAHRENHEIT MAXIMUM DEGF |
| O-Ring Material | STEEL CORROSION RESISTING |
| Supply Pressure | 3000.0 POUNDS PER SQUARE INCH LBS |
| Valve Discharge Flow Rate | 3000.0 POUNDS PER HOUR LBS |
| Valve Operation Method | HYDRAULIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 22253862 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1650-01-471-4978 is a Servovalve,hydraulic, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
Key specifications for 1650-01-471-4978: Port Quantity: 4; Operating Pressure: 4000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS; Body Material: STEEL CORROSION RESISTING; Operating Temp Rating: -65.0 FAHRENHEIT MINIMUM AND 275.0 FAHRENHEIT MAXIMUM DEGF. 8 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.