The Seat,valve, cataloged under National Stock Number 4820-00-413-2146, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions. Government technical data includes 9 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through both NSN and commercial part number lookups. 21 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-413-2146 |
| Primary Part Number | 22K4R |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.281 INCHES NOMINAL IN |
| Flange Diameter | 2.668 INCHES MINIMUM AND 2.683 INCHES MAXIMUM IN |
| FSC Application Data | VALVE,AIR COMPRESSOR |
| Body Outside Diameter | 2.425 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 0.522 INCHES NOMINAL IN |
| Under Flange Height | 0.355 INCHES NOMINAL IN |
| Material | IRON OVERALL |
| Seating Surface Shape | FLAT |
| 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 |
|---|---|
| 22K4R PRIMARY | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| 22K4R | 3/9 Design control — primary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 22K4 | 5/9 Secondary reference Ingersoll Rand Co |
| N546PC78 | 5/9 Secondary reference Ingersoll Rand Co |
| N550PC78 | 5/9 Secondary reference Ingersoll Rand Co |
| N305PC8 | 5/9 Secondary reference Ingersoll Rand Co |
| N470PC78 | 5/9 Secondary reference Ingersoll Rand Co |
| 22K4R | 5/9 Secondary reference U.S. Government activity |
| N302PC8 | 5/9 Secondary reference Ingersoll Rand Co |
| F4525PC134 | 5/9 Secondary reference Ingersoll Rand Co |
| 22K4R | 5/9 Secondary reference Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| N465PC78 | 5/9 Secondary reference Ingersoll Rand Co |
| N545PC78 | 5/9 Secondary reference Ingersoll Rand Co |
| N466PC78 | 5/9 Secondary reference Ingersoll Rand Co |
| N610PC78 | 5/9 Secondary reference Ingersoll Rand Co |
| N611PC78 | 5/9 Secondary reference Ingersoll Rand Co |
| H5657PC36 | 5/9 Secondary reference Ingersoll Rand Co |
| F2435PC8 | 5/9 Secondary reference Ingersoll Rand Co |
| F2716PC148 | 5/9 Secondary reference Ingersoll Rand Co |
| N297PC8 | 5/9 Secondary reference Ingersoll Rand Co |
| 22K4R | 5/9 Secondary reference Ingersoll Rand Co |
NSN 4820-00-413-2146 is a Seat,valve, manufactured by Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-413-2146 has 1 manufacturer part number on file: 22K4R (Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions).
Key specifications for 22K4R: Flange Seat to Disk End Height: 0.281 INCHES NOMINAL IN; Flange Diameter: 2.668 INCHES MINIMUM AND 2.683 INCHES MAXIMUM IN; FSC Application Data: VALVE,AIR COMPRESSOR; Body Outside Diameter: 2.425 INCHES NOMINAL IN. 9 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.