The Valve,check, cataloged under National Stock Number 4820-01-418-7069, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Andritz Naf Ab. Government technical data includes 15 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-418-7069 |
| Primary Part Number | 526530 DN400 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Andritz Naf Ab |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Flange Shape | ROUND ALL ENDS |
| Flange Face Design | PLAIN ALL ENDS |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Operating Pressure | 25.0 BAR MAXIMUM SINGLE RESPONSE |
| Valve Size | 400.0 MILLIMETERS MM |
| Maximum Operating Temp | 450.0 CELSIUS SINGLE RESPONSE DEGC |
| Nominal Outside Diameter | 480.0 MILLIMETERS ALL ENDS MM |
| Mounting Facility | WAFER |
| Face to Face Distance | 140.0 MILLIMETERS MM |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | STEEL UNS J02503 BODY |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 526530 DN400 PRIMARY | Andritz Naf Ab (SWE) |
| Reference | Meaning |
|---|---|
| 526530 DN400 | 3/9 Design control — primary reference Naf Ab |
| FK30.70(2)GB 526530 DN400 | 5/9 Secondary reference Naf Ab |
NSN 4820-01-418-7069 is a Valve,check, manufactured by Andritz Naf Ab, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-418-7069 has 1 manufacturer part number on file: 526530 DN400 (Andritz Naf Ab).
Key specifications for 526530 DN400: Flow Control Device: DISK; Flange Shape: ROUND ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Mounting Position: HORIZONTAL OR VERTICAL. 15 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.