The Valve,check, cataloged under National Stock Number 4820-01-453-2753, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ir Ingersoll-Rand. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-453-2753 |
| Primary Part Number | 3W90720 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ir Ingersoll-Rand |
| Status | ACTIVE |
| Connection Style | PLAIN, OPTIONAL END (PIPE) SECOND END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Minimum Operating Temp | -20.0 FAHRENHEIT DEGF |
| Connection Type | THREADED INTERNAL PIPE SECOND END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 5000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.250 INCHES ALL ENDS IN |
| Maximum Operating Temp | 400.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Disk Loading Method | SPRING |
| Material | COPPER ALLOY BODY |
| Thread Series Designator | NPT ALL ENDS |
| Opening Pressure Setting | 1.0 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 |
|---|---|
| 3W90720 | Ir Ingersoll-Rand (IRL) |
| Reference | Meaning |
|---|---|
| 2332B-2MP | 3/2 Design control — primary reference U.S. Government activity |
| 32162901 | 5/9 Secondary reference Eagle Compressors, Inc. Dba Eagle Compressors |
NSN 4820-01-453-2753 is a Valve,check, manufactured by Ir Ingersoll-Rand, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-453-2753 has 1 manufacturer part number on file: 3W90720 (Ir Ingersoll-Rand).
Key specifications for 3W90720: Connection Style: PLAIN, OPTIONAL END (PIPE) SECOND END; Connection Style: PLAIN (PIPE) FIRST END; Mounting Position: HORIZONTAL OR VERTICAL; Minimum Operating Temp: -20.0 FAHRENHEIT DEGF. 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.