The Valve,safety Relief, cataloged under National Stock Number 4820-01-079-9011, 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 30 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 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 | 4820-01-079-9011 |
| Primary Part Number | 20028 |
| 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 |
| Media for Which Designed | GAS, NATURAL SINGLE RESPONSE |
| Material | STEEL STEM |
| Style Designator | ANGLE FLANGED ENDS |
| Bolt Hole Nominal Diameter | 0.620 INCHES ALL ENDS IN |
| Operating Pressure | 275.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| First Connection Face to Centerline Distance | 3.344 INCHES IN |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| Raised Face Nominal Height | 0.180 INCHES ALL ENDS IN |
| Nominal Outside Diameter | 3.500 INCHES ALL ENDS IN |
| Face to Face Distance | 3.344 INCHES IN |
| Flow Control Device | DISK |
| Disk Loading Method | SPRING |
| Valve Operation Method | AUTOMATIC |
| Bonnet Attachment Method | BOLTED |
| Material | STEEL BODY |
| Adjustable Pressure Range | +35.0 TO 44.0 POUNDS PER SQUARE INCH LBS |
| Valve Size | 0.500 INCHES IN |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Maximum Operating Temp | 100.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Material | STEEL FLOW CONTROL DEVICE |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Connection Type | FLANGE ALL ENDS |
| Material | STEEL SEAT |
| Bolt Hole Quantity | 4 ALL ENDS |
| Flange Face Design | RAISED WITH CURVE AND RADIUS ALL ENDS |
| Bonnet Type | INSIDE SPRING |
| Nominal Thickness | 0.440 INCHES ALL ENDS IN |
| Bolt Circle Nominal Diameter | 2.380 INCHES ALL ENDS IN |
| Raised Face Nominal Diameter | 1.190 INCHES ALL ENDS IN |
| Material Document and Classification | ASTM A351,GRADE CF8 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 20028 1-2X1-2 35T44PSI | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| 20028 PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| 20028G51SS | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| 20028 | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| 20028G51SS PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
NSN 4820-01-079-9011 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 4820-01-079-9011 has 5 cross-referenced part numbers: 20028 1-2X1-2 35T44PSI (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20028 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), 20028G51SS (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20028 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20028G51SS (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
There are 12 known substitutes for 4820-01-079-9011: 4710-00-006-4572, 6685-00-074-4669, 5965-00-128-8756 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 20028: Media for Which Designed: GAS, NATURAL SINGLE RESPONSE; Material: STEEL STEM; Style Designator: ANGLE FLANGED ENDS; Bolt Hole Nominal Diameter: 0.620 INCHES ALL ENDS IN. 30 total characteristics are documented in the Federal Logistics Information System.