The Valve,butterfly, cataloged under National Stock Number 4820-01-591-4226, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Betts Industries, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-591-4226 |
| Primary Part Number | WD401ALVB162 |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Betts Industries, Inc. |
| Status | ACTIVE |
| Valve Size | 4.000 INCHES IN |
| 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 |
|---|---|
| WD401ALVB162 PRIMARY | Betts Industries, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 6201044 | D/9 Drawing number reference only Betts Industries, Inc. |
NSN 4820-01-591-4226 is a Valve,butterfly, manufactured by Betts Industries, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-591-4226 has 1 manufacturer part number on file: WD401ALVB162 (Betts Industries, Inc.).
Key specifications for WD401ALVB162: Valve Size: 4.000 INCHES IN; Part Name Assigned by Controlling Agency: 4 INCH BUTTERFLY VALVE, DETENT IN; End Item Identification: 3825-01-577-2713; DISTRIBUTOR,WATER,TANK TYPE. 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.