The Valve,safety Relief, cataloged under National Stock Number 4820-01-159-7603, 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14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-159-7603 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Flange Shape | ROUND WITH HOLES SECOND END |
| Flange Face Design | RAISED STRAIGHT SECOND END |
| Connection Style | PLAIN,OPTIONAL END(PIPE) FIRST END |
| Connection Type | FLANGE SECOND END |
| Style Designator | ANGLE |
| Adjustable Pressure Range | +50.0 TO 53.0 POUNDS PER SQUARE INCH LBS |
| Bonnet Type | INSIDE SPRING |
| Disk Loading Method | SPRING |
| Mounting Facility | THREADED FASTENER |
| Bonnet Attachment Method | THREADED |
| Material | STEEL CORROSION RESISTING OVERALL |
| 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 |
|---|---|
| V3D10112 | D/9 Drawing number reference only U.S. Government activity |
| V3D10112-01 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-159-7603 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-159-7603: Flow Control Device: POPPET; Flange Shape: ROUND WITH HOLES SECOND END; Flange Face Design: RAISED STRAIGHT SECOND END; Connection Style: PLAIN,OPTIONAL END(PIPE) FIRST 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.