The Valve,safety Relief, cataloged under National Stock Number 4820-01-050-9076, 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 25 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-050-9076 |
| Primary Part Number | 20303 |
| 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 |
| Style Designator | ANGLE FLANGED ENDS |
| Material Document and Classification | ASTM B164-61 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Maximum Operating Temp | 165.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Bolt Hole Quantity | 4 ALL ENDS |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Connection Type | FLANGE ALL ENDS |
| Material Document and Classification | QQ-C-390,ALLOY D4/D/ FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Material | COPPER ALLOY BODY |
| Second Connection Face to Centerline Distance | 3.094 INCHES IN |
| Opening Pressure Setting | 72.0 POUNDS PER SQUARE INCH LBS |
| Nominal Thickness | 0.375 INCHES ALL ENDS IN |
| Media for Which Designed | AIR SINGLE RESPONSE |
| Disk Loading Method | SPRING |
| Material Document and Classification | ASTM B164-61 ASSN STD SINGLE MATERIAL RESPONSE STEM |
| Nominal Outside Diameter | 3.562 INCHES ALL ENDS IN |
| Material | NICKEL ALLOY STEM |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Flow Control Device | DISK |
| Flange Face Design | PLAIN SWIVEL ALL ENDS |
| Bolt Circle Nominal Diameter | 2.375 INCHES ALL ENDS IN |
| First Connection Face to Centerline Distance | 3.094 INCHES IN |
| Bolt Hole Nominal Diameter | 0.500 INCHES ALL ENDS IN |
| Valve Size | 0.500 INCHES IN |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 20303K51M4 | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| 20303 PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| 20303K51M4 PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| 20303 | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
NSN 4820-01-050-9076 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 4820-01-050-9076 has 4 cross-referenced part numbers: 20303K51M4 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20303 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), 20303K51M4 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), 20303 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).
There are 10 known substitutes for 4820-01-050-9076: 4140-00-136-9214, 3110-00-144-8542, 3110-00-156-6757 and 7 more. Verify interchangeability with system specifications before substitution.
Key specifications for 20303: Style Designator: ANGLE FLANGED ENDS; Material Document and Classification: ASTM B164-61 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE; End Item Identification: SHIP,OHIO CLASS SSN(TRIDENT); Maximum Operating Temp: 165.0 FAHRENHEIT SINGLE RESPONSE DEGF. 26 total characteristics are documented in the Federal Logistics Information System.