The Valve,safety Relief, cataloged under National Stock Number 4820-01-253-7311, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-253-7311 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | PLAIN,OPTIONAL END(PIPE) FIRST END |
| Connection Type | THREADED CARTRIDGE FIRST END |
| Connection Type | UNTHREADED CARTRIDGE SECOND END |
| Style Designator | STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY. |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Adjustable Pressure Range | +900.0 TO 2000.0 POUNDS PER SQUARE INCH LBS |
| Maximum Operating Temp | 300.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Media for Which Designed | OIL SECOND RESPONSE |
| Media for Which Designed | AIR THIRD RESPONSE |
| Media for Which Designed | HYDRAULIC FLUID, PETROLEUM BASE FIRST RESPONSE |
| Material | STEEL BODY |
| Valve Discharge Flow Rate | 10.0 GALLONS PER MINUTE |
| 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 |
|---|---|
| 1354C-2000 | 3/2 Design control — primary reference U.S. Government activity |
| 1354-2000 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-253-7311 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-253-7311: Flow Control Device: DISK; Connection Style: PLAIN,OPTIONAL END(PIPE) FIRST END; Connection Type: THREADED CARTRIDGE FIRST END; Connection Type: UNTHREADED CARTRIDGE SECOND END. 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.