The Valve,safety Relief, cataloged under National Stock Number 4820-01-442-2081, 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 5 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-442-2081 |
| Primary Part Number | 20391-01-E-3300 |
| 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 |
| Disk Loading Method | SPRING |
| Style Designator | ANGLE |
| Connection Style | SOCKET WITH BRAZING RING ALL ENDS |
| Maximum Operating Temp | 150.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Material Document and Classification | ASTM B164 ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Material | NICKEL ALLOY BODY |
| Material | NICKEL ALLOY STEM |
| Material Document and Classification | ASTM B164 ASSN STD SINGLE MATERIAL RESPONSE STEM |
| Opening Pressure Setting | 3300.0 POUNDS PER SQUARE INCH LBS |
| Operating Pressure | 3450.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Material Document and Classification | ASTM B164 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Valve Operation Method | AUTOMATIC |
| Flow Control Device | DISK |
| Material | NICKEL ALLOY SEAT |
| Nominal Pipe Size Accommodated | 0.250 INCHES ALL ENDS IN |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Material Document and Classification | ASTM A494 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 2039101E3300 | Asrc Federal Facilities Logistics, Llc (USA) |
| 20391-01-E-3300 | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| 20391-01-E-3300 PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| 20391 | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| 20391 ASSY 20391-01-3-3300 | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
NSN 4820-01-442-2081 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 4820-01-442-2081 has 5 cross-referenced part numbers: 2039101E3300 (Asrc Federal Facilities Logistics, Llc), 20391-01-E-3300 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20391-01-E-3300 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), 20391 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20391 ASSY 20391-01-3-3300 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).
There are 10 known substitutes for 4820-01-442-2081: 2930-00-005-5077, 5835-00-059-5854, 1680-00-082-3376 and 7 more. Verify interchangeability with system specifications before substitution.
Key specifications for 20391-01-E-3300: Disk Loading Method: SPRING; Style Designator: ANGLE; End Item Identification: WASP CLASS LHD; Connection Style: SOCKET WITH BRAZING RING ALL ENDS. 19 total characteristics are documented in the Federal Logistics Information System.