The Valve,safety Relief, cataloged under National Stock Number 4820-01-134-1260, 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-134-1260 |
| Primary Part Number | 20210G51M |
| 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 |
| Connection Style | GASKET SEAL (PIPE) ALL ENDS |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Material | NICKEL ALLOY SEAT |
| Bonnet Type | INSIDE SPRING |
| Flow Control Device | DISK |
| Valve Operation Method | AUTOMATIC |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Media for Which Designed | AIR FIRST RESPONSE |
| Material Document and Classification | QQ-C-390,ALLOY D4/D/ FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Media for Which Designed | GAS, INERT SECOND RESPONSE |
| Material | NICKEL ALLOY STEM |
| Operating Pressure | 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Adjustable Pressure Range | +35.0 TO 44.0 POUNDS PER SQUARE INCH LBS |
| Maximum Operating Temp | 165.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Material | COPPER ALLOY BODY |
| Nominal Pipe Size Accommodated | 0.500 INCHES ALL ENDS IN |
| Bonnet Attachment Method | BOLTED |
| Style Designator | ANGLE |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-01-134-1260 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 4820-01-134-1260 has 3 cross-referenced part numbers: 20210G51M (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20210G51M (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), 20210 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).
There are 12 known substitutes for 4820-01-134-1260: 4310-00-168-8725, 5935-00-216-7435, 5915-00-393-1813 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 20210G51M: Connection Style: GASKET SEAL (PIPE) ALL ENDS; Material Document and Classification: QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE SEAT; Material: NICKEL ALLOY FLOW CONTROL DEVICE; Material: NICKEL ALLOY SEAT. 22 total characteristics are documented in the Federal Logistics Information System.