The Seat,valve, cataloged under National Stock Number 4820-01-484-0570, 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 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-484-0570 |
| Primary Part Number | 9013-005-002-S |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Velan Valve Corp. |
| Status | ACTIVE |
| Material Document and Classification | ASTM A105 ASSN STD 1ST MATERIAL RESPONSE OR A 216 GR WCB ASSN STD 2ND MATERIAL RESPONSE SEAT |
| Material | STEEL OR STEEL UNS J03002 SEAT |
| Seat Angle in Deg | 5.0000 NOMINAL |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| 9013-005-002-S PRIMARY | Velan Valve Corp. (USA) |
| 8840-034 ITEM NO 5D | Velan Valve Corp. (USA) |
| Reference | Meaning |
|---|---|
| MIL-DTL-18110 | 4/1 Identification reference U.S. Government activity |
| MIL-V-18110 | 5/9 Secondary reference U.S. Government activity |
| 8840-034 | D/9 Drawing number reference only Velan Valve Corp. |
NSN 4820-01-484-0570 is a Seat,valve, manufactured by Velan Valve Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-484-0570 has 2 manufacturer part numbers on file: 9013-005-002-S (Velan Valve Corp.), 8840-034 ITEM NO 5D (Velan Valve Corp.).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-484-0573. Verify interchangeability with system specifications before substitution.
Key specifications for 9013-005-002-S: Material Document and Classification: ASTM A105 ASSN STD 1ST MATERIAL RESPONSE OR A 216 GR WCB ASSN STD 2ND MATERIAL RESPONSE SEAT; Special Features: SEAT IS STELLITED (COBALT ALLOY); 2.625 INCH O.D.; 2.000 INCH I.D. IN; End Item Identification: 4820-01-469-3320, 2.5 IN. VELAN PRESSURE SEAL GATE VALVE IN; Material: STEEL OR STEEL UNS J03002 SEAT. 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.