The Valve,safety Relief, cataloged under National Stock Number 4820-01-368-1772, 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 18 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-368-1772 |
| Primary Part Number | 202343941SS |
| 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 |
| Furnished Items and Quantity | 2 TAILPIECE |
| Nominal Pipe Size Accommodated | 0.500 INCHES ALL ENDS IN |
| Connection Style | SOCKET WITH BRAZING RING ALL ENDS |
| Criticality Code Justification | FEAT |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Style Designator | ANGLE |
| Material Document and Classification | AISI 303 ASSN STD SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | AASTM B16 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | AISI 304 ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Operating Pressure | 440.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Adjustable Pressure Range | +45.0 TO 57.0 POUNDS PER SQUARE INCH LBS |
| Maximum Operating Temp | 165.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Disk Loading Method | SPRING |
| Material | BRONZE BODY |
| Material | COPPER ALLOY 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 | Y |
| Part Number | Manufacturer |
|---|---|
| D44UU-01H-1/2-3/4 | Dante Valve Company (USA) |
| 202343941SS PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| Reference | Meaning |
|---|---|
| 202343941SS | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| D44UU-01H-1/2-3/4 | 5/9 Secondary reference Danco Valve Company |
| D44UU-01 1/2X3/4 | 5/9 Secondary reference Danco Valve Company |
| 4820PL1283070 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 4820-01-368-1772 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 4820-01-368-1772 has 2 manufacturer part numbers on file: D44UU-01H-1/2-3/4 (Dante Valve Company), 202343941SS (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
Key specifications for 202343941SS: Furnished Items and Quantity: 2 TAILPIECE; Nominal Pipe Size Accommodated: 0.500 INCHES ALL ENDS IN; Connection Style: SOCKET WITH BRAZING RING ALL ENDS; Criticality Code Justification: FEAT. 18 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.