The Valve,safety Relief, cataloged under National Stock Number 4820-01-191-8291, 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 21 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-01-191-8291 |
| Primary Part Number | E8551F41M |
| 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 | CANCELLED |
| Valve Operation Method | AUTOMATIC |
| Second Connection Face to Centerline Distance | 3.000 INCHES IN |
| Nominal Thickness | 0.375 INCHES ALL ENDS IN |
| Style Designator | ANGLE FLANGED ENDS |
| First Connection Face to Centerline Distance | 3.000 INCHES IN |
| Valve Size | 0.500 INCHES IN |
| Material | NICKEL ALLOY STEM |
| Adjustable Pressure Range | +30.0 TO 34.0 POUNDS PER SQUARE INCH LBS |
| Maximum Operating Temp | 150.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Bolt Hole Quantity | 3 ALL ENDS |
| Connection Type | FLANGE ALL ENDS |
| Media for Which Designed | WATER-OIL-GAS SINGLE RESPONSE |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Flange Face Design | PLAIN ALL ENDS |
| Bolt Circle Nominal Diameter | 2.438 INCHES ALL ENDS IN |
| Material | COPPER ALLOY BODY |
| Bolt Hole Nominal Diameter | 0.562 INCHES ALL ENDS IN |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Flow Control Device | DISK |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Nominal Outside Diameter | 3.562 INCHES ALL ENDS IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| D50FF-04-1/2 IN | Danco Valve Company (USA) |
| 20221FS41M | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| 20221FSF41M | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| E8551F41M | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| E8551F41M PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| D50FF-04-1/2 IN PRIMARY | Dante Valve Company (USA) |
| 20221 | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| 20221FS41M PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
NSN 4820-01-191-8291 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: cancelled.
NSN 4820-01-191-8291 has 8 cross-referenced part numbers: D50FF-04-1/2 IN (Danco Valve Company), 20221FS41M (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20221FSF41M (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), E8551F41M (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), E8551F41M (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team) and 3 more.
There are 12 known substitutes for 4820-01-191-8291: 3110-00-100-6175, 5915-00-147-7738, 2910-00-148-7495 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for E8551F41M: Valve Operation Method: AUTOMATIC; Second Connection Face to Centerline Distance: 3.000 INCHES IN; Nominal Thickness: 0.375 INCHES ALL ENDS IN; Style Designator: ANGLE FLANGED ENDS. 21 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-01-191-8291 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.