The Valve,safety Relief, cataloged under National Stock Number 4820-01-143-1383, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Emerson Automation Solutions Final Control Us Lp Div Navy Product Team. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-143-1383 |
| Primary Part Number | 20234 PART 2023411941SS |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
| Status | ACTIVE |
| Flow Control Device | BALL |
| Furnished Items and Quantity | 2 NUT AND 2 TAILPIECE |
| Connection Style | SOCKET WITH BRAZING RING (TUBE) ALL ENDS |
| 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 |
| Adjustable Pressure Range | +228.0 TO 265.0 POUNDS PER SQUARE INCH LBS |
| Material | COPPER ALLOY BODY |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | STEEL CORROSION RESISTING SEAT |
| Material | STEEL CORROSION RESISTING STEM |
| 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 |
|---|---|
| 20234 PART 2023411941SS PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| D44UU-09 1/2 X 3/4 IN PRIMARY | Dante Valve Company (USA) |
| 20234-11-941SS PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| Reference | Meaning |
|---|---|
| D44UU-09 1/2 X 3/4 IN | 5/9 Secondary reference Danco Valve Company |
| 20234 PART 2023411941SS | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| 20234-11-941SS | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
NSN 4820-01-143-1383 is a Valve,safety Relief, manufactured by Emerson Automation Solutions Final Control Us Lp Div Navy Product Team, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-143-1383 has 3 manufacturer part numbers on file: 20234 PART 2023411941SS (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), D44UU-09 1/2 X 3/4 IN (Dante Valve Company), 20234-11-941SS (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
Key specifications for 20234 PART 2023411941SS: Flow Control Device: BALL; Furnished Items and Quantity: 2 NUT AND 2 TAILPIECE; Connection Style: SOCKET WITH BRAZING RING (TUBE) ALL ENDS; Connection Type: UNTHREADED INTERNAL TUBE ALL ENDS. 13 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.