The Valve,safety Relief, cataloged under National Stock Number 4820-01-346-1649, 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 20 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-346-1649 |
| Primary Part Number | 46H0-209/M5,NMP 1115OPT-F 42PSI |
| 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 Shape | ROUND WITH HOLES ALL ENDS |
| Flange Face Design | PLAIN ALL ENDS |
| Bolt Circle Nominal Diameter | 8.875 INCHES FIRST END IN |
| Bolt Circle Nominal Diameter | 11.062 INCHES SECOND END IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | ANGLE FLANGED ENDS |
| Bolt Hole Nominal Diameter | 0.687 INCHES SECOND END IN |
| Bolt Hole Nominal Diameter | 0.687 INCHES FIRST END IN |
| Valve Size | 9.000 INCHES IN |
| Second Connection Face to Centerline Distance | 9.000 INCHES IN |
| Nominal Outside Diameter | 12.375 INCHES FIRST END IN |
| Nominal Outside Diameter | 10.125 INCHES SECOND END IN |
| Bolt Hole Quantity | 14 FIRST END |
| First Connection Face to Centerline Distance | 8.937 INCHES IN |
| Material | BRONZE BODY |
| Opening Pressure Setting | 42.0 POUNDS PER SQUARE INCH LBS |
| Valve Operation Method | AUTOMATIC |
| Nominal Thickness | 0.625 INCHES SECOND END IN |
| Nominal Thickness | 0.562 INCHES FIRST END IN |
| 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 |
|---|---|
| 46H0-209/M5,NMP 1115OPT-F 42PSI PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| Reference | Meaning |
|---|---|
| 46H0-209/M5,NMP 1115OPT-F 42PSI | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| NMP-111OPTION-F 42PSI SET | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| NMP-1115OPTION-F 42PSI SET | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| 46H0-209/M5,NMP 1115OPT-F 42PSI | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
NSN 4820-01-346-1649 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 4820-01-346-1649 has 1 manufacturer part number on file: 46H0-209/M5,NMP 1115OPT-F 42PSI (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
Key specifications for 46H0-209/M5,NMP 1115OPT-F 42PSI: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Bolt Circle Nominal Diameter: 8.875 INCHES FIRST END IN. 20 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.