The Valve,check, cataloged under National Stock Number 4820-01-342-8633, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Eaton Corporation Dba Eaton Inoac Div Eaton. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-342-8633 |
| Primary Part Number | 190000 PART FF91-XXX-20-60 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Eaton Corporation Dba Eaton Inoac Div Eaton |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | PLAIN (TUBE) ALL ENDS |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | AMS-5640,TY I ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | MIL-R-83248,TY I,CL I MIL SPEC SINGLE MATERIAL RESPONSE PACKING |
| Material Document and Classification | MIL-R-83248,TY I,CL I MIL SPEC SINGLE MATERIAL RESPONSE SEAT |
| Operating Pressure | 6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 2.750 INCHES ALL ENDS IN |
| Disk Loading Method | SPRING |
| Media for Which Designed | WATER-OIL-GAS SINGLE RESPONSE |
| Thread Class | 2A ALL ENDS A |
| Thread Quantity Per Inch | 12 ALL ENDS |
| Material | STEEL FLOW CONTROL DEVICE |
| Material | RUBBER FLUOROCARBON CLASS FPM PACKING |
| Material | STEEL COMP 303 BODY |
| Material | RUBBER FLUOROCARBON CLASS FPM SEAT |
| Thread Series Designator | UN ALL ENDS |
| Opening Pressure Setting | 60.0 POUNDS PER SQUARE INCH LBS |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 190000 PART FF91-XXX-20-60 PRIMARY | Eaton Corporation Dba Eaton Inoac Div Eaton (USA) |
| FF91-XXX-20-60 | Eaton Corporation Dba Eaton Inoac Div Eaton (USA) |
| Reference | Meaning |
|---|---|
| 190000 | D/9 Drawing number reference only Eaton Corporation Dba Eaton Inoac Div Eaton |
NSN 4820-01-342-8633 is a Valve,check, manufactured by Eaton Corporation Dba Eaton Inoac Div Eaton, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-342-8633 has 2 manufacturer part numbers on file: 190000 PART FF91-XXX-20-60 (Eaton Corporation Dba Eaton Inoac Div Eaton), FF91-XXX-20-60 (Eaton Corporation Dba Eaton Inoac Div Eaton).
Key specifications for 190000 PART FF91-XXX-20-60: Flow Control Device: DISK; Connection Style: PLAIN (TUBE) ALL ENDS; Mounting Position: HORIZONTAL OR VERTICAL; Connection Type: THREADED EXTERNAL TUBE ALL ENDS. 22 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.