The Valve,safety Relief, cataloged under National Stock Number 4820-01-211-0939, 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 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-211-0939 |
| Primary Part Number | 20154G11M |
| 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 |
| Material | NICKEL ALLOY STEM |
| Material Document and Classification | ASTM B-61 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Style Designator | ANGLE |
| Operating Pressure | 3450.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Adjustable Pressure Range | +500.0 TO 3450.0 POUNDS PER SQUARE INCH LBS |
| Disk Loading Method | SPRING |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE STEM |
| Maximum Operating Temp | 180.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Material | NICKEL ALLOY SEAT |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material | COPPER ALLOY BODY |
| Bonnet Type | EXPOSED SPRING |
| Bonnet Attachment Method | BOLTED |
| Flow Control Device | DISK |
| Nominal Outside Diameter Tube Accommodated | 0.500 INCHES ALL ENDS IN |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Media for Which Designed | GAS, INERT SINGLE RESPONSE |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| Connection Style | SOCKET WITH BRAZING RING (TUBE) ALL ENDS |
| Connection Type | UNTHREADED INTERNAL TUBE ALL ENDS |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-01-211-0939 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 4820-01-211-0939 has 3 cross-referenced part numbers: 20154G11M (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), 20154 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20154G11M (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).
There are 9 known substitutes for 4820-01-211-0939: 5950-00-135-0781, 4730-00-200-3412, 5133-00-228-1398 and 6 more. Verify interchangeability with system specifications before substitution.
Key specifications for 20154G11M: Material: NICKEL ALLOY STEM; Material Document and Classification: ASTM B-61 ASSN STD SINGLE MATERIAL RESPONSE BODY; Style Designator: ANGLE; Operating Pressure: 3450.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 21 total characteristics are documented in the Federal Logistics Information System.