The Valve,safety Relief, cataloged under National Stock Number 4820-01-161-6426, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Emerson Automation Solutions Final Control Us Lp Div Navy Product Team. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-161-6426 |
| Primary Part Number | 20254R51M |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
| Status | ACTIVE |
| Opening Pressure Setting | 157.0 POUNDS PER SQUARE INCH LBS |
| Material | NICKEL ALLOY STEM |
| Material Document and Classification | QQ-C-390,ALLOY D4/D/ FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Style Designator | ANGLE |
| Nominal Pipe Size Accommodated | 1.000 INCHES ALL ENDS IN |
| Maximum Operating Temp | 165.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Valve Operation Method | AUTOMATIC |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Bonnet Attachment Method | BOLTED |
| Bonnet Type | INSIDE SPRING |
| Flow Control Device | DISK |
| Material | NICKEL ALLOY SEAT |
| Media for Which Designed | WATER-OIL-GAS SINGLE RESPONSE |
| Material | COPPER ALLOY BODY |
| Specification/standard Data | 81349-MIL-V-22549 GOVERNMENT SPECIFICATION |
| Operating Pressure | 460.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Connection Style | SOCKET WITH BRAZING RING ALL ENDS |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 20254R51M | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| 20254 | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| MIL-V-22549 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| 20254R51M PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
NSN 4820-01-161-6426 is a Valve,safety Relief, manufactured by Emerson Automation Solutions Final Control Us Lp Div Navy Product Team, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-161-6426 has 4 cross-referenced part numbers: 20254R51M (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20254 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), MIL-V-22549 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 20254R51M (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
There are 6 known substitutes for 4820-01-161-6426: 5935-00-283-7113, 6145-01-147-8598, 5962-01-167-7879 and 3 more. Verify interchangeability with system specifications before substitution.
Key specifications for 20254R51M: Opening Pressure Setting: 157.0 POUNDS PER SQUARE INCH LBS; Material: NICKEL ALLOY STEM; Material Document and Classification: QQ-C-390,ALLOY D4/D/ FED SPEC SINGLE MATERIAL RESPONSE BODY; Style Designator: ANGLE. 19 total characteristics are documented in the Federal Logistics Information System.