The Valve,safety Relief, cataloged under National Stock Number 4820-01-443-7721, 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 20 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. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-443-7721 |
| Primary Part Number | 20367L51M |
| 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 | COPPER ALLOY 922 BODY |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| Material | NICKEL ALLOY STEM |
| Adjustable Pressure Range | +76.0 TO 90.0 POUNDS PER SQUARE INCH LBS |
| Connection Type | BUTT WELD TUBE ALL ENDS |
| Material | NICKEL ALLOY SEAT |
| Valve Operation Method | AUTOMATIC |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Material Document and Classification | ASTM B-61 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE STEM |
| Bonnet Attachment Method | BOLTED |
| Bonnet Type | INSIDE SPRING |
| Media for Which Designed | GAS, NATURAL SINGLE RESPONSE |
| Style Designator | ANGLE |
| Nominal Outside Diameter Tube Accommodated | 1.000 INCHES ALL ENDS IN |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Connection Style | BEVELED (TUBE) ALL ENDS |
| Furnished Items and Quantity | 1 CAP |
| Disk Loading Method | SPRING |
| Flow Control Device | DISK |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-01-443-7721 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 4820-01-443-7721 has 3 cross-referenced part numbers: 20367 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20367L51M (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20367L51M (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
There are 11 known substitutes for 4820-01-443-7721: 6640-00-045-4900, 5310-00-187-1853, 5330-00-297-7324 and 8 more. Verify interchangeability with system specifications before substitution.
Key specifications for 20367L51M: Material: COPPER ALLOY 922 BODY; Material Document and Classification: QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE SEAT; Material: NICKEL ALLOY STEM; Adjustable Pressure Range: +76.0 TO 90.0 POUNDS PER SQUARE INCH LBS. 21 total characteristics are documented in the Federal Logistics Information System.