The Valve,safety Relief, cataloged under National Stock Number 4820-01-490-0301, 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 7 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-490-0301 |
| Primary Part Number | 57694 MODEL 1 |
| 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 |
| Style Designator | ANGLE FLANGED ENDS |
| Valve Size | 1.500 INCHES IN |
| Maximum Operating Temp | 900.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Second Connection Face to Centerline Distance | 4.875 INCHES IN |
| First Connection Face to Centerline Distance | 5.625 INCHES IN |
| Material | STEEL UNS J12522 BODY |
| 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 |
|---|---|
| 57694 MODEL 1 PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| Reference | Meaning |
|---|---|
| A-32934-1 | D/9 Drawing number reference only Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
| D-29631 | 5/9 Secondary reference Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
NSN 4820-01-490-0301 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 4820-01-490-0301 has 1 manufacturer part number on file: 57694 MODEL 1 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
Key specifications for 57694 MODEL 1: Style Designator: ANGLE FLANGED ENDS; Valve Size: 1.500 INCHES IN; Maximum Operating Temp: 900.0 FAHRENHEIT SINGLE RESPONSE DEGF; Second Connection Face to Centerline Distance: 4.875 INCHES IN. 7 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.