The Valve,safety Relief, cataloged under National Stock Number 4820-00-554-9951, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Anderson Greenwood Lp Dba Anderson Greenwood Crosby. Government technical data includes 28 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, 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 | 4820-00-554-9951 |
| Primary Part Number | 189 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| Status | ACTIVE |
| Material | STEEL CORROSION RESISTING STEM |
| Nominal Thread Size | 0.750 INCHES FIRST END IN |
| Media for Which Designed | GAS, INERT SECOND RESPONSE |
| Nominal Thread Size | 0.500 INCHES SECOND END IN |
| Maximum Operating Temp | 300.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Flow Control Device | DISK |
| Material | COPPER ALLOY BODY |
| Thread Direction | RIGHT-HAND SECOND END |
| Connection Style | PLAIN,OPTIONAL END(PIPE) FIRST END |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | STEEL CORROSION RESISTING SEAT |
| Features Provided | VALVE STEM LOCK SHIELD AND PRESSURE TIGHT OUTLET SIDE |
| Operating Pressure | 6500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Style Designator | ANGLE |
| Media for Which Designed | AIR SINGLE RESPONSE |
| Thread Series Designator | NPT FIRST END |
| Connection Style | PLAIN,OPTIONAL END(PIPE) SECOND END |
| Thread Series Designator | NPT SECOND END |
| Nominal Pipe Size Accommodated | 0.500 INCHES SECOND END IN |
| Disk Loading Method | SPRING |
| Valve Operation Method | AUTOMATIC OR MANUAL |
| Bonnet Attachment Method | THREADED |
| Opening Pressure Setting | 3650.0 POUNDS PER SQUARE INCH LBS |
| Connection Type | THREADED INTERNAL PIPE SECOND END |
| Bonnet Type | INSIDE SPRING |
| Connection Type | THREADED INTERNAL PIPE FIRST END |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Pipe Size Accommodated | 0.750 INCHES FIRST END IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 189 PRIMARY | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
NSN 4820-00-554-9951 is a Valve,safety Relief, manufactured by Anderson Greenwood Lp Dba Anderson Greenwood Crosby, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-554-9951 has 1 cross-referenced part number: 189 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).
There are 12 known substitutes for 4820-00-554-9951: 5905-00-100-3027, 3110-00-100-9814, 5995-00-164-6494 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 189: Material: STEEL CORROSION RESISTING STEM; Nominal Thread Size: 0.750 INCHES FIRST END IN; Media for Which Designed: GAS, INERT SECOND RESPONSE; Nominal Thread Size: 0.500 INCHES SECOND END IN. 28 total characteristics are documented in the Federal Logistics Information System.