The Valve,safety Relief, cataloged under National Stock Number 4820-01-057-4138, 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 17 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-057-4138 |
| Primary Part Number | 20-CS-169-171T200PSI |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| Status | ACTIVE |
| Material | COPPER ALLOY BODY |
| Media for Which Designed | WATER, FRESH SINGLE RESPONSE |
| Material | COPPER ALLOY FLOW CONTROL DEVICE |
| Style Designator | ANGLE |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Adjustable Pressure Range | +171.0 TO 200.0 POUNDS PER SQUARE INCH LBS |
| Material | NICKEL ALLOY SEAT |
| Flow Control Device | DISK |
| Material Document and Classification | ASTM B164,CLASS C ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Maximum Operating Temp | 150.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Material Document and Classification | QQ-C-390,ALOY D4/D/ FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ASTM 283-56 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Operating Pressure | 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Connection Style | SOCKET ALL ENDS |
| Nominal Pipe Size Accommodated | 0.500 INCHES FIRST END IN |
| Disk Loading Method | SPRING |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 9520 | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| 20-CS-169-171T200PSI PRIMARY | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
NSN 4820-01-057-4138 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 4820-01-057-4138 has 2 cross-referenced part numbers: 9520 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20-CS-169-171T200PSI (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).
There are 12 known substitutes for 4820-01-057-4138: 5940-00-192-9968, 3030-00-317-4811, 2990-00-403-1613 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 20-CS-169-171T200PSI: Material: COPPER ALLOY BODY; Media for Which Designed: WATER, FRESH SINGLE RESPONSE; Material: COPPER ALLOY FLOW CONTROL DEVICE; Style Designator: ANGLE. 18 total characteristics are documented in the Federal Logistics Information System.