The Valve,safety Relief, cataloged under National Stock Number 4820-01-143-2860, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Anderson Greenwood Lp Dba Anderson Greenwood Crosby. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-143-2860 |
| Primary Part Number | 9523 W/VITON PKG 460T550PSI |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | STREAMLINED WITH ONE BRAZING RING (TUBE) FIRST END |
| Connection Style | STREAMLINED WITH TWO BRAZING RINGS (TUBE) SECOND END |
| Connection Type | UNTHREADED INTERNAL TUBE ALL ENDS |
| Style Designator | ANGLE |
| Nominal Outside Diameter Tube Accommodated | 0.500 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 0.750 INCHES FIRST END IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Adjustable Pressure Range | +460.0 TO 550.0 POUNDS PER SQUARE INCH LBS |
| Disk Loading Method | SPRING |
| Media for Which Designed | HYDRAULIC FLUID, PHOSPHATE-ESTER BASE SINGLE RESPONSE |
| Material | COPPER ALLOY BODY |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | STEEL CORROSION RESISTING SEAT |
| Material | STEEL CORROSION RESISTING STEM |
| Material | PLASTIC POLYCHLOROTRIFLUOROETHYLENE PACKING |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 9523 W/VITON PKG 460T550PSI PRIMARY | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| 189CS167X9523W/VIT 460T550PSI PRIMARY | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| Reference | Meaning |
|---|---|
| D49-30UU-01 1/2 IN | 5/9 Secondary reference Danco Valve Company |
| D49-30UU-01 1/2 IN | C/1 Advisory reference — outside the item-of-supply concept Dante Valve Company |
NSN 4820-01-143-2860 is a Valve,safety Relief, manufactured by Anderson Greenwood Lp Dba Anderson Greenwood Crosby, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-143-2860 has 2 manufacturer part numbers on file: 9523 W/VITON PKG 460T550PSI (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 189CS167X9523W/VIT 460T550PSI (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).
Key specifications for 9523 W/VITON PKG 460T550PSI: Flow Control Device: DISK; Connection Style: STREAMLINED WITH ONE BRAZING RING (TUBE) FIRST END; Connection Style: STREAMLINED WITH TWO BRAZING RINGS (TUBE) SECOND END; Connection Type: UNTHREADED INTERNAL TUBE ALL ENDS. 17 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.