The Valve,check, cataloged under National Stock Number 4820-01-005-1909, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Allied Systems Company Dba Allied Systems Co. Government technical data includes 10 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-005-1909 |
| Primary Part Number | 229665 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Allied Systems Company Dba Allied Systems Co |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | PLAIN (TUBE) ALL ENDS |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | UNTHREADED CARTRIDGE ALL ENDS |
| Style Designator | STRAIGHT THRU DROP-IN CARTRIDGE |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Disk Loading Method | SPRING |
| Media for Which Designed | WATER, FRESH SINGLE RESPONSE |
| Material | STEEL BODY |
| 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 |
|---|---|
| 229665 | Allied Systems Company Dba Allied Systems Co (USA) |
| 234907 | Allied Systems Company Dba Allied Systems Co (USA) |
| Reference | Meaning |
|---|---|
| C2949S-12Q-.123 | 5/9 Secondary reference U.S. Government activity |
| C2949S12Q0-123 | 5/9 Secondary reference U.S. Government activity |
| C2949S12Q | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-005-1909 is a Valve,check, manufactured by Allied Systems Company Dba Allied Systems Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-005-1909 has 2 manufacturer part numbers on file: 229665 (Allied Systems Company Dba Allied Systems Co), 234907 (Allied Systems Company Dba Allied Systems Co).
Key specifications for 229665: Flow Control Device: DISK; Connection Style: PLAIN (TUBE) ALL ENDS; Mounting Position: HORIZONTAL OR VERTICAL; Connection Type: UNTHREADED CARTRIDGE ALL ENDS. 10 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.