The Disk,valve, cataloged under National Stock Number 4820-01-434-0175, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Gulf Valve Co. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-434-0175 |
| Primary Part Number | MB15DW1-03 2.00IN |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Gulf Valve Co |
| Status | ACTIVE |
| Outside Diameter | 2.375 INCHES NOMINAL IN |
| Style Designator | SWING CHECK |
| 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 |
|---|---|
| MB15DW1-03 2.00IN PRIMARY | Gulf Valve Co (USA) |
| MB15DW1-03 | Gulf Valve Co (USA) |
| Reference | Meaning |
|---|---|
| MB15DW1 | D/9 Drawing number reference only Gulf Valve Co |
NSN 4820-01-434-0175 is a Disk,valve, manufactured by Gulf Valve Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-434-0175 has 2 manufacturer part numbers on file: MB15DW1-03 2.00IN (Gulf Valve Co), MB15DW1-03 (Gulf Valve Co).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-434-0598. Verify interchangeability with system specifications before substitution.
Key specifications for MB15DW1-03 2.00IN: Outside Diameter: 2.375 INCHES NOMINAL IN; Style Designator: SWING CHECK; End Item Identification: STRATEGIC SEALIFT CONVERSION SHIPS CLASS; Material: ALUMINUM ALLOY. 3 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.