The Valve,safety Relief, cataloged under National Stock Number 4820-00-245-0862, 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-245-0862 |
| Primary Part Number | 20342B01S0145 |
| 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 FIRST END |
| Flange Shape | ROUND WITH HOLES SECOND END |
| Renewable Seat Ring Type | THREADED |
| Flange Face Design | RAISED STRAIGHT SECOND END |
| Flange Face Design | RAISED STRAIGHT FIRST END |
| Bolt Circle Nominal Diameter | 2.375 INCHES SECOND END IN |
| Bolt Circle Nominal Diameter | 2.625 INCHES FIRST END IN |
| Connection Type | FLANGE SECOND END |
| Connection Type | FLANGE FIRST END |
| Style Designator | ANGLE FLANGED ENDS |
| Material Document and Classification | ASTMA105,GRADE2 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ASTMA276,TYPE303 ASSN STD 1ST MATERIAL RESPONSE OR ASTMA276,TYPE304 ASSN STD 2ND MATERIAL RESPONSE OR ASTMA276,TYPE316-CANCELED ASSN STD 3RD MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | ASTMA276,TYPE303 ASSN STD 1ST MATERIAL RESPONSE OR ASTMA276,TYPE304 ASSN STD 2ND MATERIAL RESPONSE OR ASTMA276,TYPE316-CANCELED ASSN STD 3RD MATERIAL RESPONSE SEAT |
| Material Document and Classification | FED STD 66,AISI 410/SAE 51410 FED STD SINGLE MATERIAL RESPONSE STEM |
| Bolt Hole Nominal Diameter | 0.630 INCHES SECOND END IN |
| Bolt Hole Nominal Diameter | 0.630 INCHES FIRST END IN |
| Operating Pressure | 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 0.500 INCHES IN |
| Adjustable Pressure Range | +145.0 TO 206.0 POUNDS PER SQUARE INCH LBS |
| Features Provided | PRESSURE TIGHT OUTLET SIDE |
| Bonnet Type | INSIDE SPRING |
| Maximum Operating Temp | 775.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Second Connection Face to Centerline Distance | 3.500 INCHES IN |
| Nondefinitive Spec/std Data | 2 TYPE AND D COMPOSITION AND 1-2IN.IPS SIZE IN |
| Nominal Outside Diameter | 3.750 INCHES FIRST END IN |
| Nominal Outside Diameter | 3.500 INCHES SECOND END IN |
| Disk Loading Method | SPRING |
| Bolt Hole Quantity | 4 SECOND END |
| Bolt Hole Quantity | 4 FIRST END |
| 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 |
|---|---|
| 20342B01S0145 PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| Reference | Meaning |
|---|---|
| CNSRN08SCC | 5/9 Secondary reference Danco Valve Company |
| CNCRN08CCC | 5/9 Secondary reference Danco Valve Company |
| FF2751-1-2INIPS | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| MILV20065 | 4/1 Identification reference U.S. Government activity |
| TY2C0MPD1-2 400-145T0206F | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| CNCRN08CCC | C/1 Advisory reference — outside the item-of-supply concept Dante Valve Company |
| 20342X51FTSS | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| 20342X51FTSS | 5/9 Secondary reference Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
NSN 4820-00-245-0862 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 4820-00-245-0862 has 1 manufacturer part number on file: 20342B01S0145 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
Key specifications for 20342B01S0145: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES FIRST END; Flange Shape: ROUND WITH HOLES SECOND END; Renewable Seat Ring Type: THREADED. 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.