The Valve,safety Relief, cataloged under National Stock Number 4820-00-202-9565, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 50 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-202-9565 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Nominal Pipe Size Accommodated | 0.500 INCHES SECOND END IN |
| Nominal Pipe Size Accommodated | 0.375 INCHES FIRST END IN |
| Connection Style | PLAIN,OPTIONAL END(PIPE) SECOND END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Type | THREADED INTERNAL PIPE SECOND END |
| Connection Type | UNTHREADED EXTERNAL PIPE FIRST END |
| Style Designator | ANGLE |
| Features Provided | PRESSURE TIGHT OUTLET SIDE |
| Thread Direction | RIGHT-HAND SECOND END |
| Nominal Thread Size | 0.500 INCHES SECOND END IN |
| Disk Loading Method | SPRING |
| Thread Quantity Per Inch | 14 SECOND END |
| Material | COPPER ALLOY BODY |
| Material | COPPER ALLOY FLOW CONTROL DEVICE |
| Material | STEEL STEM |
| Material | COPPER ALLOY SEAT |
| Thread Series Designator | NPT SECOND END |
| Opening Pressure Setting | 10.0 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 |
|---|---|
| D15-739YPC37T042-46 | 5/9 Secondary reference Westinghouse Electric Corp |
| D15-680BPC689T0694-718 | 5/2 Secondary reference U.S. Government activity |
| CL55S53-2PC41T046-879 | 5/2 Secondary reference U.S. Government activity |
| D15-640-0PC841T0846-849 | 5/9 Secondary reference U.S. Government activity |
| D15-716WPC429T0434-455 | 5/9 Secondary reference U.S. Government activity |
| D15-651-0PC1136T01141-1143 | 5/9 Secondary reference Westinghouse Electric Corp |
| D15-769WPC33T039 | 5/9 Secondary reference Westinghouse Electric Corp |
| CV9S5300-01PC37T046 | 5/2 Secondary reference U.S. Government activity |
| D15-680UPC689T0694-718 | 5/9 Secondary reference Westinghouse Electric Corp |
| D15-739ZPC37T042-46 | 5/2 Secondary reference U.S. Government activity |
| D15-739ZPC37T042-46 | 5/9 Secondary reference U.S. Government activity |
| D15-648AAPC37T042-46 | 5/2 Secondary reference U.S. Government activity |
| CA68S5300-35PC689T0694-718 | 5/2 Secondary reference U.S. Government activity |
| D15-716IP429-434-455 | 5/2 Secondary reference U.S. Government activity |
| D15-794PC179T0184-221 | 5/9 Secondary reference Westinghouse Electric Corp |
| D15-619TPC41T046-879 | 5/9 Secondary reference Westinghouse Electric Corp |
| D15-680XPC689T0694-718 | 5/9 Secondary reference U.S. Government activity |
| D15-716BPC429T0434-455 | 5/9 Secondary reference Westinghouse Electric Corp |
| D15-631BPC841T0847 | 5/9 Secondary reference U.S. Government activity |
| CVL48S5300-47900PC33T039 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-00-202-9565 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-202-9565: Flow Control Device: POPPET; Nominal Pipe Size Accommodated: 0.500 INCHES SECOND END IN; Nominal Pipe Size Accommodated: 0.375 INCHES FIRST END IN; Connection Style: PLAIN,OPTIONAL END(PIPE) SECOND END. 20 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.