The Valve,safety Relief, cataloged under National Stock Number 4820-01-374-7729, 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 22 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-374-7729 |
| Primary Part Number | SW124C01E0028 |
| 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 | DISK |
| Flange Face Design | RAISED STRAIGHT ALL ENDS |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | ANGLE FLANGED ENDS |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | ASTM A351 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Operating Pressure | 35.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 0.500 INCHES IN |
| Maximum Operating Temp | 125.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Disk Loading Method | SPRING |
| Face to Face Distance | 3.250 INCHES IN |
| Media for Which Designed | WATER, FRESH SINGLE RESPONSE |
| First Connection Face to Centerline Distance | 3.250 INCHES IN |
| Material | STEEL CORROSION RESISTING SEAT |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Material | STEEL CORROSION RESISTING BODY |
| Material | STEEL CORROSION RESISTING STEM |
| Opening Pressure Setting | 28.5 POUNDS PER SQUARE INCH LBS |
| Valve Discharge Flow Rate | 1.5 GALLONS PER MINUTE |
| 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 |
|---|---|
| SW124 | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| SW124C01E0028 PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| Reference | Meaning |
|---|---|
| SW124A01E0028.5 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| SW124 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| SW124A01E0028.5 | 5/9 Secondary reference Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
NSN 4820-01-374-7729 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 4820-01-374-7729 has 2 manufacturer part numbers on file: SW124 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), SW124C01E0028 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-377-4585. Verify interchangeability with system specifications before substitution.
Key specifications for SW124C01E0028: Flow Control Device: DISK; Flange Face Design: RAISED STRAIGHT ALL ENDS; Connection Type: FLANGE ALL ENDS; Style Designator: ANGLE FLANGED 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.