The Valve,check, cataloged under National Stock Number 4820-01-252-0488, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ditta Seguino Ambrogio. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,check |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Ditta Seguino Ambrogio (CAGE AE018) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-252-0488 |
| Primary Part Number | 3H23788 SG |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ditta Seguino Ambrogio |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 3H23788 SG | Ditta Seguino Ambrogio (ITA) |
| Reference | Meaning |
|---|---|
| W136208T2 | 3/9 Design control — primary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 32001711 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| W136208 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 3H23788 | C/1 Advisory reference — outside the item-of-supply concept Ingersoll-Rand Company Dba Ingersoll-Rand |
| 3H23788 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| W136208T2 | 5/9 Secondary reference U.S. Government activity |
| W136208T2 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| 32001711 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| 32001711 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-252-0488 is a Valve,check, manufactured by Ditta Seguino Ambrogio, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-252-0488 has 1 manufacturer part number on file: 3H23788 SG (Ditta Seguino Ambrogio).
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.