The Valve,safety Relief, cataloged under National Stock Number 4820-01-108-5455, 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 23 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-108-5455 |
| Primary Part Number | 9523 651 TO 775 PSI |
| 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 |
| Furnished Items and Quantity | 3 BRAZING RING AND 2 TAILPIECE |
| Renewable Seat Ring Type | PRESSED-IN |
| Connection Style | STREAMLINED WITH ONE BRAZING RING (TUBE) ALL ENDS |
| Connection Type | UNTHREADED INTERNAL TUBE ALL ENDS |
| Style Designator | ANGLE |
| Material Document and Classification | QQ-C-390,ALLOY D4/D/ FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | AISI 303 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | AISI 303 ASSN STD SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | FED STD 66 FED SPEC SINGLE MATERIAL RESPONSE AND AISI 304/SAE 3034 ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Nominal Outside Diameter Tube Accommodated | 0.500 INCHES ALL ENDS IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Adjustable Pressure Range | +651.0 TO 775.0 POUNDS PER SQUARE INCH LBS |
| Bonnet Type | INSIDE SPRING |
| Nondefinitive Spec/std Data | F COMPOSITION |
| Disk Loading Method | SPRING |
| Bonnet Attachment Method | THREADED |
| Media for Which Designed | WATER-OIL-GAS SINGLE RESPONSE |
| Material | COPPER ALLOY BODY |
| Material | STEEL COMP 303 FLOW CONTROL DEVICE |
| Material | STEEL COMP 303 STEM |
| Material | STEEL COMP 304 SEAT |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 9523 651 TO 775 PSI PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| Reference | Meaning |
|---|---|
| 9523 651 TO 775 PSI | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| MIL-V-22549 | 4/1 Identification reference U.S. Government activity |
| 9523 W/VIT0N PK | C/1 Advisory reference — outside the item-of-supply concept Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| D49-30UU-03 1/2 IN | 5/9 Secondary reference Danco Valve Company |
| 9523 651 T0 775 | C/1 Advisory reference — outside the item-of-supply concept Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
NSN 4820-01-108-5455 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 4820-01-108-5455 has 1 manufacturer part number on file: 9523 651 TO 775 PSI (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
Key specifications for 9523 651 TO 775 PSI: Flow Control Device: DISK; Furnished Items and Quantity: 3 BRAZING RING AND 2 TAILPIECE; Renewable Seat Ring Type: PRESSED-IN; Connection Style: STREAMLINED WITH ONE BRAZING RING (TUBE) ALL ENDS. 23 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.