The Piston,valve, cataloged under National Stock Number 4820-01-390-8205, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Kaeser Compressors, Inc.. Government technical data includes 1 specification, 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-390-8205 |
| Primary Part Number | 4.9026.0 |
| Item Name | Piston,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Kaeser Compressors, Inc. |
| Status | ACTIVE |
| Valve Type for Which Designed | RELIEF |
| 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 |
|---|---|
| 4.9026.0 PRIMARY | Kaeser Compressors, Inc. (USA) |
NSN 4820-01-390-8205 is a Piston,valve, manufactured by Kaeser Compressors, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-390-8205 has 1 manufacturer part number on file: 4.9026.0 (Kaeser Compressors, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 1680-01-653-3627. Verify interchangeability with system specifications before substitution.
Key specifications for 4.9026.0: Valve Type for Which Designed: RELIEF; End Item Identification: KAESER COMPRESSOR MODEL AS 30/35. 1 specification is 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.