The Valve,check, cataloged under National Stock Number 4820-00-287-4446, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is The Walworth Company. Government technical data includes 21 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-00-287-4446 |
| Primary Part Number | FIG75 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | The Walworth Company |
| Status | CANCELLED |
| Connection Style | PLAIN, OPTIONAL END (PIPE) ALL ENDS |
| Maximum Operating Temp | 150.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Thread Quantity Per Inch | 11-1/2 FIRST END |
| Maximum Operating Temp | 400.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Material | COPPER ALLOY 836 BODY |
| Media for Which Designed | STEAM FIRST RESPONSE |
| Media for Which Designed | WATER-OIL-GAS SECOND RESPONSE |
| Style Designator | STRAIGHT THRU |
| Nominal Thread Size | 2.000 INCHES ALL ENDS IN |
| Material Document and Classification | QQ-C-390,ALLOY B5/D/ FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| Thread Series Designator | NPT ALL ENDS |
| Operating Pressure | 125.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Material | COPPER ALLOY 836 SEAT |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Material Document and Classification | QQ-C-390,ALLOY B5/D/ FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Material | COPPER ALLOY FLOW CONTROL DEVICE |
| Flow Control Device | DISK |
| Mounting Position | VERTICAL |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| FIG75 | The Walworth Company (USA) |
NSN 4820-00-287-4446 is a Valve,check, manufactured by The Walworth Company, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-287-4446 has 1 cross-referenced part number: FIG75 (The Walworth Company).
There is 1 known substitute for 4820-00-287-4446: 4820-00-287-4447. Verify interchangeability with system specifications before substitution.
Key specifications for FIG75: Connection Style: PLAIN, OPTIONAL END (PIPE) ALL ENDS; Maximum Operating Temp: 150.0 FAHRENHEIT SECOND RESPONSE DEGF; Thread Quantity Per Inch: 11-1/2 FIRST END; Maximum Operating Temp: 400.0 FAHRENHEIT FIRST RESPONSE DEGF. 21 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-287-4446 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.