The Valve,flow Control, cataloged under National Stock Number 4820-01-535-2894, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-535-2894 |
| Item Name | Valve,flow Control |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Stem Material | COPPER ALLOY AND STEEL CORROSION RESISTING |
| Maximum Operating Temp and Media for Which Designed | 400.0 FAHRENHEIT REFRIGERANT 22 DEGF |
| Operating Pressure and Type | 500.0 POUNDS PER SQUARE INCH (PSI) REFRIGERANT R-22 MAXIMUM REQUIRED LBS |
| Connection Type | THREADED EXTERNAL HOSE |
| End Connection Quantity | 2 |
| Nominal Thread Size | 0.437 INCHES IN |
| Body Material | COPPER ALLOY |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Thread Series Designator | UNF |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| A31434 | 3/9 Design control — primary reference Jb Industries Inc |
| 17-1-9812-1 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 4820-01-535-2894 is a Valve,flow Control, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-535-2894: Stem Material: COPPER ALLOY AND STEEL CORROSION RESISTING; Maximum Operating Temp and Media for Which Designed: 400.0 FAHRENHEIT REFRIGERANT 22 DEGF; Operating Pressure and Type: 500.0 POUNDS PER SQUARE INCH (PSI) REFRIGERANT R-22 MAXIMUM REQUIRED LBS; Connection Type: THREADED EXTERNAL HOSE. 11 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.