The Valve,safety Relief, cataloged under National Stock Number 4820-01-307-8762, 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 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-307-8762 |
| Primary Part Number | NMP1091F05G0909 |
| 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 |
| Nominal Pipe Size Accommodated | 1.500 INCHES FIRST END IN |
| Nominal Pipe Size Accommodated | 2.500 INCHES SECOND END IN |
| Flange Face Design | RAISED STRAIGHT ALL ENDS |
| Bolt Circle Nominal Diameter | 4.500 INCHES SECOND END IN |
| Bolt Circle Nominal Diameter | 5.500 INCHES FIRST END IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | ANGLE FLANGED ENDS |
| Bolt Hole Nominal Diameter | 0.750 INCHES FIRST END IN |
| Bolt Hole Nominal Diameter | 0.875 INCHES SECOND END IN |
| Valve Size | 1.500 INCHES IN |
| Adjustable Pressure Range | +908.0 TO 1011.0 POUNDS PER SQUARE INCH LBS |
| Bonnet Type | INSIDE SCREW |
| Second Connection Face to Centerline Distance | 4.875 INCHES IN |
| Nominal Outside Diameter | 7.000 INCHES FIRST END IN |
| Nominal Outside Diameter | 6.125 INCHES SECOND END IN |
| Bolt Hole Quantity | 4 ALL ENDS |
| Bonnet Attachment Method | THREADED |
| First Connection Face to Centerline Distance | 6.000 INCHES IN |
| Material | STEEL BODY |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | STEEL COMP 416 STEM |
| Raised Face Nominal Diameter | 4.125 INCHES FIRST END IN |
| Raised Face Nominal Diameter | 2.875 INCHES SECOND END IN |
| Valve Operation Method | AUTOMATIC |
| Raised Face Nominal Height | 0.062 INCHES FIRST END IN |
| Raised Face Nominal Height | 0.250 INCHES SECOND END IN |
| Nominal Thickness | 0.688 INCHES FIRST END IN |
| Nominal Thickness | 0.875 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 |
|---|---|
| NMP1091F05G0909 PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| Reference | Meaning |
|---|---|
| NMP1091F05G0909 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| D50G1-1/2X2-1/2-869T968PSI | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| D50G1-1/2X2 1/2-908T1011 PSI | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| D50G1-1/2X2 1/2-908T1011 PSI | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
NSN 4820-01-307-8762 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 4820-01-307-8762 has 1 manufacturer part number on file: NMP1091F05G0909 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
Key specifications for NMP1091F05G0909: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES ALL ENDS; Nominal Pipe Size Accommodated: 1.500 INCHES FIRST END IN; Nominal Pipe Size Accommodated: 2.500 INCHES SECOND 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.