The Valve,check, cataloged under National Stock Number 4820-01-285-6154, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-285-6154 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 1.000 INCHES ALL ENDS IN |
| Connection Style | SOCKET (PIPE) ALL ENDS |
| Mounting Position | HORIZONTAL |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE 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 |
| Reference | Meaning |
|---|---|
| 29U 1.00IN | 5/9 Secondary reference Hoerbiger Corp of America Inc |
| 29U-50-313266 | 3/9 Design control — primary reference Hoerbiger Corp of America Inc |
| 335345 | D/9 Drawing number reference only Hoerbiger Corp of America Inc |
NSN 4820-01-285-6154 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5330-01-424-9533. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-285-6154: Nominal Pipe Size Accommodated: 1.000 INCHES ALL ENDS IN; Connection Style: SOCKET (PIPE) ALL ENDS; Mounting Position: HORIZONTAL; Connection Type: UNTHREADED INTERNAL PIPE ALL ENDS. 7 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.