The Valve,check, cataloged under National Stock Number 4820-00-850-3026, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Lunkenheimer Co. Government technical data includes 21 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-00-850-3026 |
| Primary Part Number | F1G554 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Lunkenheimer Co |
| Status | CANCELLED |
| Media for Which Designed | WATER-OIL-GAS SECOND RESPONSE |
| Operating Pressure | 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Thread Series Designator | NPT ALL ENDS |
| Material Document and Classification | QQ-C-390, ALLOY D4D FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| Style Designator | STRAIGHT THRU |
| Nominal Thread Size | 0.375 INCHES ALL ENDS IN |
| Material Document and Classification | QQ-C-390, ALLOY D4D FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Valve Operation Method | AUTOMATIC |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Media for Which Designed | STEAM FIRST RESPONSE |
| Connection Style | PLAIN, OPTIONAL END (PIPE) ALL ENDS |
| Disk Loading Method | SPRING |
| Maximum Operating Temp | 550.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Material | COPPER ALLOY FLOW CONTROL DEVICE |
| Material | COPPER ALLOY 922 SEAT |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY VALVE SIZE |
| Flow Control Device | DISK |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Material | COPPER ALLOY 922 BODY |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
NSN 4820-00-850-3026 is a Valve,check, manufactured by Lunkenheimer Co, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-850-3026 has 3 cross-referenced part numbers: F1G554 (Lunkenheimer Co), 560 (William Powell Company, the Dba Powell Valve Div the Starflo Corporation), 17266 (William Powell Company, the Dba Powell Valve Div the Starflo Corporation).
There are 6 known substitutes for 4820-00-850-3026: 6625-01-303-4632, 4820-01-313-5389, 4820-01-313-5463 and 3 more. Verify interchangeability with system specifications before substitution.
Key specifications for F1G554: Media for Which Designed: WATER-OIL-GAS SECOND RESPONSE; Operating Pressure: 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS; Thread Series Designator: NPT ALL ENDS; Material Document and Classification: QQ-C-390, ALLOY D4D FED SPEC SINGLE MATERIAL RESPONSE SEAT. 21 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-850-3026 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.