The Valve,safety Relief, cataloged under National Stock Number 4820-01-340-9945, 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 24 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-340-9945 |
| Primary Part Number | D0-10P CDS-653 N |
| 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 SECOND END IN |
| Bolt Circle Nominal Diameter | 7.500 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 | 4.000 INCHES IN |
| Maximum Operating Temp | 150.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Second Connection Face to Centerline Distance | 7.125 INCHES IN |
| Nominal Outside Diameter | 9.000 INCHES FIRST END IN |
| Nominal Outside Diameter | 11.000 INCHES SECOND END IN |
| Bolt Hole Quantity | 8 ALL ENDS |
| First Connection Face to Centerline Distance | 9.000 INCHES IN |
| Material | STEEL BODY |
| Raised Face Nominal Diameter | 8.500 INCHES SECOND END IN |
| Raised Face Nominal Diameter | 6.188 INCHES FIRST END IN |
| Opening Pressure Setting | 50.0 POUNDS PER SQUARE INCH LBS |
| Valve Operation Method | AUTOMATIC |
| Raised Face Nominal Height | 0.062 INCHES ALL ENDS IN |
| Nominal Thickness | 1.000 INCHES SECOND END IN |
| Nominal Thickness | 0.938 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 |
|---|---|
| D0-10P CDS-653 N PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| Reference | Meaning |
|---|---|
| D0-10P CDS-653 NMP-1092 OPT.B | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| D0-10P CDS-653 NMP-1092 OPT.B | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
NSN 4820-01-340-9945 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 4820-01-340-9945 has 1 manufacturer part number on file: D0-10P CDS-653 N (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
Key specifications for D0-10P CDS-653 N: 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 SECOND END IN. 24 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.