The Valve,expansion, cataloged under National Stock Number 4820-01-398-4577, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Flair Corporation Dba S P X Air Treatment Div Dehydration. Government technical data includes 2 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. 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 | 4820-01-398-4577 |
| Primary Part Number | 9802-1 |
| Item Name | Valve,expansion |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Flair Corporation Dba S P X Air Treatment Div Dehydration |
| Status | ACTIVE |
| Bulb Media Type | REFRIGERANT |
| Material | COPPER ALLOY BODY |
| 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 |
|---|---|
| 9802-1 PRIMARY | Flair Corporation Dba S P X Air Treatment Div Dehydration (USA) |
NSN 4820-01-398-4577 is a Valve,expansion, manufactured by Flair Corporation Dba S P X Air Treatment Div Dehydration, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-398-4577 has 1 manufacturer part number on file: 9802-1 (Flair Corporation Dba S P X Air Treatment Div Dehydration).
2 possible matches (shared part number, not a government interchangeability claim): 5331-01-464-5311, 4910-01-685-7466. Verify interchangeability with system specifications before substitution.
Key specifications for 9802-1: Bulb Media Type: REFRIGERANT; End Item Identification: HANKISON INTERNATIONAL COMPRESSED AIR DRYER MODEL NO. PR200; Material: COPPER ALLOY BODY. 2 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.