The Valve,safety Relief, cataloged under National Stock Number 4820-00-460-2202, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-00-460-2202 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | DIAPHRAGM |
| Nominal Pipe Size Accommodated | 0.500 INCHES ALL ENDS IN |
| Connection Style | PLAIN,OPTIONAL END(PIPE) ALL ENDS |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Style Designator | ANGLE |
| Operating Pressure | 205.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Features Provided | VALVE STEM LOCK SHIELD |
| Bonnet Type | INSIDE SCREW |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.500 INCHES ALL ENDS IN |
| Maximum Operating Temp | 200.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Disk Loading Method | SPRING |
| Bonnet Attachment Method | INTEGRAL |
| Media for Which Designed | REFRIGERANT 12 SECOND RESPONSE |
| Media for Which Designed | REFRIGERANT 22 FIRST RESPONSE |
| Media for Which Designed | REFRIGERANT, HALOGENATED THIRD RESPONSE |
| Material | COPPER ALLOY BODY |
| Material | COPPER ALLOY STEM |
| Material | COPPER ALLOY OR COPPER SEAT |
| Material | STEEL CORROSION RESISTING OR COPPER ALLOY FLOW CONTROL DEVICE |
| Thread Series Designator | NPT ALL ENDS |
| 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 |
|---|---|
| 5422-1-2IPS205PSIR114 | 5/9 Secondary reference Henry Technologies, Inc. |
| 5422-205 | 3/9 Design control — primary reference Henry Technologies, Inc. |
NSN 4820-00-460-2202 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-460-2202: Flow Control Device: DIAPHRAGM; Nominal Pipe Size Accommodated: 0.500 INCHES ALL ENDS IN; Connection Style: PLAIN,OPTIONAL END(PIPE) ALL ENDS; Connection Type: THREADED INTERNAL PIPE ALL ENDS. 22 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.