The Valve,y, cataloged under National Stock Number 4820-01-541-9472, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Aquamatic Inc. Government technical data includes 2 specifications, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-541-9472 |
| Primary Part Number | K520-X201-24000/1071071 |
| Item Name | Valve,y |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Aquamatic Inc |
| Status | ACTIVE |
| Flow Control Device | DIAPHRAGM |
| Style Designator | STRAIGHT THRU Y-PATTERN |
| 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 |
|---|---|
| K520-X201-24000/1071071 PRIMARY | Aquamatic Inc (USA) |
| Reference | Meaning |
|---|---|
| 520MOD | 5/9 Secondary reference Aquamatic Inc |
| 520VDW/VITONINTERNAL | 5/9 Secondary reference Mechanical Equipment Company, Inc. Dba Mechanical Equipment Co Inc |
| 1084001 | 5/9 Secondary reference Aquamatic Inc |
NSN 4820-01-541-9472 is a Valve,y, manufactured by Aquamatic Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-541-9472 has 1 manufacturer part number on file: K520-X201-24000/1071071 (Aquamatic Inc).
Key specifications for K520-X201-24000/1071071: Flow Control Device: DIAPHRAGM; Style Designator: STRAIGHT THRU Y-PATTERN; Part Name Assigned by Controlling Agency: SERIES 520 DIAPHRAGM VALVE; End Item Identification: HX REACTOR BOUNDRY AREA. 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.