The Valve,safety Relief, cataloged under National Stock Number 4820-01-308-5209, 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 30 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-308-5209 |
| Primary Part Number | D010N,NMP-1093OP |
| 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 | RAISED STRAIGHT ALL ENDS |
| Bolt Circle Nominal Diameter | 9.500 INCHES FIRST END IN |
| Bolt Circle Nominal Diameter | 7.500 INCHES SECOND END IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | ANGLE FLANGED ENDS |
| Bolt Hole Nominal Diameter | 0.750 INCHES SECOND END IN |
| Bolt Hole Nominal Diameter | 0.875 INCHES FIRST END IN |
| Operating Pressure | 225.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 4.000 INCHES IN |
| Bonnet Type | INSIDE SCREW |
| Maximum Operating Temp | 250.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Second Connection Face to Centerline Distance | 7.750 INCHES IN |
| Nominal Outside Diameter | 11.000 INCHES FIRST END IN |
| Nominal Outside Diameter | 9.000 INCHES SECOND END IN |
| Bolt Hole Quantity | 8 ALL ENDS |
| Bonnet Attachment Method | BOLTED |
| First Connection Face to Centerline Distance | 8.250 INCHES IN |
| Material | STEEL BODY |
| Material | STEEL COMP 303 FLOW CONTROL DEVICE |
| Material | STEEL COMP 416 STEM |
| Raised Face Nominal Diameter | 6.188 INCHES SECOND END IN |
| Raised Face Nominal Diameter | 8.500 INCHES FIRST END IN |
| Opening Pressure Setting | 75.0 POUNDS PER SQUARE INCH LBS |
| Valve Operation Method | AUTOMATIC |
| Raised Face Nominal Height | 0.062 INCHES FIRST END IN |
| Raised Face Nominal Height | 0.688 INCHES SECOND END IN |
| Nominal Thickness | 1.000 INCHES FIRST END IN |
| Nominal Thickness | 0.938 INCHES SECOND 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 |
|---|---|
| D010N,NMP-1093OP PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| NMP-1093 4INX6IN | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| UCASNN11SMNP | Dante Valve Company (USA) |
| Reference | Meaning |
|---|---|
| UCASNN11SMNP | 5/9 Secondary reference Danco Valve Company |
| D010N,NMP-1093OPT-B 75PSI SET | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| DO10N,NMP-1093O | C/1 Advisory reference — outside the item-of-supply concept Kunkle Industries Inc Lonergan Valve Div |
| NMP-1093 4INX6IN 66T80PSI | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| NMP-1093 4INX6IN 66T80PSI | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| D010N,NMP-1093OPT-B 75PSI SET | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
NSN 4820-01-308-5209 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 4820-01-308-5209 has 3 manufacturer part numbers on file: D010N,NMP-1093OP (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), NMP-1093 4INX6IN (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), UCASNN11SMNP (Dante Valve Company).
Key specifications for D010N,NMP-1093OP: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: RAISED STRAIGHT ALL ENDS; Bolt Circle Nominal Diameter: 9.500 INCHES FIRST END IN. 30 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.