The Valve,safety Relief, cataloged under National Stock Number 4820-01-434-6660, 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 29 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 1 manufacturer, 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 | 4820-01-434-6660 |
| Primary Part Number | 77321003 |
| 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 |
| Flow Control Device | DISK |
| Raised Face Nominal Diameter | 2.000 INCHES FIRST END IN |
| Disk Loading Method | SPRING |
| Valve Operation Method | AUTOMATIC |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Nominal Outside Diameter | 0.500 INCHES SECOND END IN |
| Bolt Hole Nominal Diameter | 0.625 INCHES ALL ENDS IN |
| Material | RUBBER SEAT |
| Second Connection Face to Centerline Distance | 4.250 INCHES IN |
| Nominal Thickness | 0.562 INCHES FIRST END IN |
| First Connection Face to Centerline Distance | 4.000 INCHES IN |
| Connection Type | FLANGE ALL ENDS |
| Bolt Circle Nominal Diameter | 2.375 INCHES SECOND END IN |
| Valve Size | 1.000 INCHES IN |
| Material | STEEL COMP 316 FLOW CONTROL DEVICE |
| Raised Face Nominal Diameter | 1.375 INCHES SECOND END IN |
| Maximum Operating Temp | 500.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Nominal Thickness | 0.438 INCHES SECOND END IN |
| Adjustable Pressure Range | +56.0 TO 77.0 POUNDS PER SQUARE INCH LBS |
| Material | STEEL COMP 416 STEM |
| Bolt Hole Quantity | 4 ALL ENDS |
| Nominal Outside Diameter | 1.000 INCHES FIRST END IN |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SINGLE RESPONSE |
| Style Designator | ANGLE FLANGED ENDS |
| Valve Discharge Flow Rate | 18.0 GALLONS PER MINUTE |
| Operating Pressure | 1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Raised Face Nominal Height | 0.062 INCHES ALL ENDS IN |
| Bolt Circle Nominal Diameter | 3.125 INCHES FIRST END IN |
| Material | STEEL COMP 316 BODY |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 77321003 PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| DS-G-74893 ASSY 77321003 | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| DS-G-74893 | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| 9512101D0050 0100 56T77PSI | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
NSN 4820-01-434-6660 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 4820-01-434-6660 has 4 cross-referenced part numbers: 77321003 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), DS-G-74893 ASSY 77321003 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), DS-G-74893 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), 9512101D0050 0100 56T77PSI (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
There are 9 known substitutes for 4820-01-434-6660: 4820-01-434-5344, 4820-01-434-5345, 4820-01-434-5348 and 6 more. Verify interchangeability with system specifications before substitution.
Key specifications for 77321003: Flow Control Device: DISK; Raised Face Nominal Diameter: 2.000 INCHES FIRST END IN; Disk Loading Method: SPRING; Valve Operation Method: AUTOMATIC. 30 total characteristics are documented in the Federal Logistics Information System.