The Disk,valve, cataloged under National Stock Number 4820-01-428-4339, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Emerson Automation Solutions Final Control Us Lp. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 4820-01-428-4339 |
| Primary Part Number | DAR1-3-088 ITEM 2 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Automation Solutions Final Control Us Lp |
| Status | ACTIVE |
| Pressure Rating | 175.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Outside Diameter | 3.000 INCHES NOMINAL IN |
| Style Designator | BUTTERFLY |
| Material | ALUMINUM ALLOY |
| 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 |
|---|---|
| 204-001 3IN. | Emerson Automation Solutions Final Control Us Lp (USA) |
| DAR1-3-088 ITEM 2 PRIMARY | Emerson Automation Solutions Final Control Us Lp (USA) |
| SM0780 ITEM 2 | Emerson Automation Solutions Final Control Us Lp (USA) |
| 103-204-030-100-004 PRIMARY | Emerson Automation Solutions Final Control Us Lp (USA) |
| Reference | Meaning |
|---|---|
| DAR1-3-088 | D/9 Drawing number reference only Emerson Automation Solutions Final Control Us Lp |
| SM0780 | D/9 Drawing number reference only Emerson Automation Solutions Final Control Us Lp |
NSN 4820-01-428-4339 is a Disk,valve, manufactured by Emerson Automation Solutions Final Control Us Lp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-428-4339 has 4 manufacturer part numbers on file: 204-001 3IN. (Emerson Automation Solutions Final Control Us Lp), DAR1-3-088 ITEM 2 (Emerson Automation Solutions Final Control Us Lp), SM0780 ITEM 2 (Emerson Automation Solutions Final Control Us Lp), 103-204-030-100-004 (Emerson Automation Solutions Final Control Us Lp).
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-428-4448, 4820-01-428-4452, 4820-01-428-6893. Verify interchangeability with system specifications before substitution.
Key specifications for DAR1-3-088 ITEM 2: Pressure Rating: 175.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Outside Diameter: 3.000 INCHES NOMINAL IN; Style Designator: BUTTERFLY; End Item Identification: 3.000 IN. AR1/TRIM 088 VALVE IN. 4 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.