The Valve,check, cataloged under National Stock Number 4820-01-063-1816, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Velan Valve Corp.. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-063-1816 |
| Primary Part Number | W3-234B2TS64222 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Velan Valve Corp. |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Nominal Pipe Size Accommodated | 0.500 INCHES SECOND END IN |
| Connection Style | SOCKET (PIPE) SECOND END |
| Connection Style | PLAIN, OPTIONAL END (PIPE) FIRST END |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | THREADED INTERNAL PIPE FIRST END |
| Connection Type | UNTHREADED INTERNAL PIPE SECOND END |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 600.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.500 INCHES FIRST END IN |
| Disk Loading Method | SPRING |
| Media for Which Designed | WATER-OIL-GAS SINGLE RESPONSE |
| Material | STEEL OVERALL |
| Thread Series Designator | NPT FIRST END |
| 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 |
|---|---|
| 64222W3-234B2TS | Velan Valve Corp. (USA) |
| W3-234B2TS64222 PRIMARY | Velan Valve Corp. (USA) |
| Reference | Meaning |
|---|---|
| 64222 | D/9 Drawing number reference only Velan Valve Corp. |
NSN 4820-01-063-1816 is a Valve,check, manufactured by Velan Valve Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-063-1816 has 2 manufacturer part numbers on file: 64222W3-234B2TS (Velan Valve Corp.), W3-234B2TS64222 (Velan Valve Corp.).
1 possible match (shared part number, not a government interchangeability claim): 6625-01-476-4133. Verify interchangeability with system specifications before substitution.
Key specifications for W3-234B2TS64222: Flow Control Device: DISK; Nominal Pipe Size Accommodated: 0.500 INCHES SECOND END IN; Connection Style: SOCKET (PIPE) SECOND END; Connection Style: PLAIN, OPTIONAL END (PIPE) FIRST END. 16 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.