The Valve,check, cataloged under National Stock Number 4820-01-435-1381, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-435-1381 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Connection Style | PLAIN (SCREW-IN CARTRIDGE) ALL ENDS |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Minimum Operating Temp | -40.0 CELSIUS DEGC |
| Connection Type | THREADED CARTRIDGE ALL ENDS |
| Style Designator | SCREW-IN CARTRIDGE |
| Operating Pressure | 3500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.750 INCHES ALL ENDS IN |
| Maximum Operating Temp | 120.0 CELSIUS SINGLE RESPONSE DEGC |
| Disk Loading Method | SPRING |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SINGLE RESPONSE |
| Material | STEEL BODY |
| Thread Series Designator | BSP.F ALL ENDS |
| Opening Pressure Setting | 60.0 POUNDS PER SQUARE INCH LBS |
| 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 |
| Reference | Meaning |
|---|---|
| 17158 IT 14 | 5/9 Secondary reference Hamworthy Kse Ab |
| CV16-20-6B-N-60 | C/1 Advisory reference — outside the item-of-supply concept Hydraforce Inc |
| 17158 IT 14 | 5/9 Secondary reference Tts Marine Ab Formerly Tts Ships Equipment Ab Div Dry Cargo Handling |
| CV16-20-6B-N-60 | 3/9 Design control — primary reference Hamworthy Kse Ab |
| CV16-20-6B-N-60 | 5/9 Secondary reference Tts Marine Ab Formerly Tts Ships Equipment Ab Div Dry Cargo Handling |
NSN 4820-01-435-1381 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-435-1381: Flow Control Device: POPPET; Connection Style: PLAIN (SCREW-IN CARTRIDGE) ALL ENDS; Mounting Position: HORIZONTAL OR VERTICAL; Minimum Operating Temp: -40.0 CELSIUS DEGC. 16 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.