The Valve,lift-Check, cataloged under National Stock Number 4820-01-075-7231, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 14 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. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-075-7231 |
| Primary Part Number | 803-2177141-452 |
| Item Name | Valve,lift-Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Nominal Pipe Size Accommodated | 4.000 INCHES ALL ENDS IN |
| Connection Style | BEVELED (PIPE) ALL ENDS |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | BUTT WELD PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | ASTM A182,GRADE F1 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Operating Pressure | 900.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Bonnet Type | INSIDE SPRING |
| Maximum Operating Temp | 775.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Disk Loading Method | WEIGHT |
| Bonnet Attachment Method | INTEGRAL |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 803-2177141-452 PRIMARY | Naval Sea Systems Command (USA) |
| 810-2177141-452 | Naval Sea Systems Command (USA) |
NSN 4820-01-075-7231 is a Valve,lift-Check, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-075-7231 has 2 manufacturer part numbers on file: 803-2177141-452 (Naval Sea Systems Command), 810-2177141-452 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-438-6025, 4820-01-554-3773. Verify interchangeability with system specifications before substitution.
Key specifications for 803-2177141-452: Flow Control Device: DISK; Nominal Pipe Size Accommodated: 4.000 INCHES ALL ENDS IN; Connection Style: BEVELED (PIPE) ALL ENDS; Mounting Position: HORIZONTAL OR VERTICAL. 14 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.