The Valve,safety Relief, cataloged under National Stock Number 4820-00-289-2103, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Lunkenheimer Co. Government technical data includes 23 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-289-2103 |
| Primary Part Number | FIG. 629 3/4IN. |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Lunkenheimer Co |
| Status | ACTIVE |
| Thread Series Designator | NPT SECOND END |
| Bonnet Attachment Method | THREADED |
| Connection Style | PLAIN (PIPE) SECOND END |
| Disk Loading Method | SPRING |
| Nominal Thread Size | 0.750 INCHES SECOND END IN |
| Nominal Pipe Size Accommodated | 0.750 INCHES SECOND END IN |
| Material | COPPER ALLOY OVERALL |
| Connection Type | THREADED EXTERNAL PIPE SECOND END |
| Nominal Pipe Size Accommodated | 1.000 INCHES FIRST END IN |
| Thread Direction | RIGHT-HAND FIRST END |
| Flow Control Device | DISK |
| Bonnet Type | INSIDE SPRING |
| Operating Pressure | 250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Media for Which Designed | STEAM SINGLE RESPONSE |
| Style Designator | ANGLE |
| Adjustable Pressure Range | +76.0 TO 175.0 POUNDS PER SQUARE INCH LBS |
| Thread Series Designator | NPT FIRST END |
| Nominal Thread Size | 1.000 INCHES FIRST END IN |
| Maximum Operating Temp | 450.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Thread Direction | RIGHT-HAND SECOND END |
| Connection Type | THREADED INTERNAL PIPE FIRST END |
| Connection Style | PLAIN,OPTIONAL END(PIPE) FIRST END |
| Valve Operation Method | AUTOMATIC OR MANUAL |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| FIG. 629 3/4IN. | Lunkenheimer Co (USA) |
| D10966 | Lunkenheimer Co (USA) |
NSN 4820-00-289-2103 is a Valve,safety Relief, manufactured by Lunkenheimer Co, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-289-2103 has 2 cross-referenced part numbers: FIG. 629 3/4IN. (Lunkenheimer Co), D10966 (Lunkenheimer Co).
There is 1 known substitute for 4820-00-289-2103: 5950-00-234-7524. Verify interchangeability with system specifications before substitution.
Key specifications for FIG. 629 3/4IN.: Thread Series Designator: NPT SECOND END; Bonnet Attachment Method: THREADED; Connection Style: PLAIN (PIPE) SECOND END; Disk Loading Method: SPRING. 23 total characteristics are documented in the Federal Logistics Information System.