The Valve,safety Relief, cataloged under National Stock Number 4820-01-255-8899, 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 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-255-8899 |
| Primary Part Number | 9957D41M |
| 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 |
| Flow Control Device | DISK |
| Flange Shape | ROUND WITH HOLES FIRST END |
| Nominal Thickness | 0.500 INCHES FIRST END IN |
| Valve Operation Method | AUTOMATIC |
| Bolt Hole Quantity | 4 FIRST END |
| Nominal Pipe Size Accommodated | 2.000 INCHES SECOND END IN |
| Adjustable Pressure Range | +20.0 TO 24.0 POUNDS PER SQUARE INCH LBS |
| Bolt Circle Nominal Diameter | 4.750 INCHES FIRST END IN |
| Material | COPPER ALLOY BODY |
| Connection Type | FLANGE FIRST END |
| Connection Style | SOCKET WITH BRAZING RING SECOND END |
| Connection Type | UNTHREADED INTERNAL PIPE SECOND END |
| Flange Face Design | PLAIN FIRST END |
| Bolt Hole Nominal Diameter | 0.750 INCHES FIRST END IN |
| Style Designator | ANGLE |
| Material | STEEL COMP 316 STEM |
| Nominal Outside Diameter | 6.000 INCHES FIRST END IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 9957 | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| 9957D41M | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| 9957D41M PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| 9957 | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
NSN 4820-01-255-8899 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 4820-01-255-8899 has 4 cross-referenced part numbers: 9957 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), 9957D41M (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 9957D41M (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), 9957 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).
There are 5 known substitutes for 4820-01-255-8899: 2805-00-528-6396, 5310-00-595-9994, 5950-01-076-1821 and 2 more. Verify interchangeability with system specifications before substitution.
Key specifications for 9957D41M: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES FIRST END; Nominal Thickness: 0.500 INCHES FIRST END IN; Valve Operation Method: AUTOMATIC. 18 total characteristics are documented in the Federal Logistics Information System.