The Seat,valve, cataloged under National Stock Number 4820-01-473-2448, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Velan Valve Corp.. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-473-2448 |
| Primary Part Number | 8572-000-062 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Velan Valve Corp. |
| Status | ACTIVE |
| Material Document and Classification | ASTM A479 TY 316 ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Material | STEEL COMP 316 SEAT |
| 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 |
|---|---|
| 8572-000-062 PRIMARY | Velan Valve Corp. (USA) |
| 7490-702 ITEM 14 | Velan Valve Corp. (USA) |
| Reference | Meaning |
|---|---|
| 7490-702 | D/9 Drawing number reference only Velan Valve Corp. |
NSN 4820-01-473-2448 is a Seat,valve, manufactured by Velan Valve Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-473-2448 has 2 manufacturer part numbers on file: 8572-000-062 (Velan Valve Corp.), 7490-702 ITEM 14 (Velan Valve Corp.).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-493-2492. Verify interchangeability with system specifications before substitution.
Key specifications for 8572-000-062: Material Document and Classification: ASTM A479 TY 316 ASSN STD SINGLE MATERIAL RESPONSE SEAT; Special Features: NHA 3" GLOBE/STOP-CHECK VALVE CAGE 57574 P/N 7492-601; MFR'S NAME FOR PART IS "BACKSEAT"; End Item Identification: ARLEIGH BURKE CLASS DDG; Material: STEEL COMP 316 SEAT. 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.