The Valve,safety Relief, cataloged under National Stock Number 4820-01-495-5307, 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 22 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-495-5307 |
| Primary Part Number | 20206L51M |
| 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 |
| Material | NICKEL ALLOY SEAT |
| Operating Pressure | 1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Bonnet Type | INSIDE SPRING |
| Style Designator | ANGLE |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE STEM |
| Furnished Items and Quantity | 2 TAILPIECE AND 2 NUT AND 1 PLUGGED DRAIN AND 1 RELIEF PLUG |
| Material | NICKEL ALLOY STEM |
| Adjustable Pressure Range | +76.0 TO 90.0 POUNDS PER SQUARE INCH LBS |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Valve Operation Method | AUTOMATIC |
| Material | COPPER ALLOY 922 BODY |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| Material Document and Classification | ASTM B-61 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Connection Style | SOCKET ALL ENDS |
| Material Document and Classification | QQ-N-281 FED SPEC 1ST MATERIAL RESPONSE AND AMS 3660 ASSN STD 2ND MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Disk Loading Method | SPRING |
| Nominal Pipe Size Accommodated | 1.000 INCHES ALL ENDS IN |
| Renewable Seat Ring Type | PRESSED-IN |
| Maximum Operating Temp | 165.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Bonnet Attachment Method | BOLTED |
| Flow Control Device | DISK |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 20206L51M PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| 20206L51M | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| MIL-V-22459 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| 20206 | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
NSN 4820-01-495-5307 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 4820-01-495-5307 has 4 cross-referenced part numbers: 20206L51M (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), 20206L51M (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), MIL-V-22459 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 20206 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).
There are 12 known substitutes for 4820-01-495-5307: 4810-00-168-8723, 4720-00-440-2072, 3110-00-554-5839 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 20206L51M: Material: NICKEL ALLOY SEAT; Operating Pressure: 1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Bonnet Type: INSIDE SPRING; Style Designator: ANGLE. 24 total characteristics are documented in the Federal Logistics Information System.