The Valve,check, cataloged under National Stock Number 4820-01-486-5808, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Rotaryaire Compressor Corp. Government technical data includes 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-486-5808 |
| Primary Part Number | CV-1/2IN |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Rotaryaire Compressor Corp |
| Status | ACTIVE |
| Mounting Position | HORIZONTAL |
| Connection Type | UNTHREADED EXTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU Y-PATTERN |
| 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 |
|---|---|
| CV-1/2IN | Rotaryaire Compressor Corp (USA) |
| Reference | Meaning |
|---|---|
| CV-0.50IN | C/1 Advisory reference — outside the item-of-supply concept Rotaryaire Compressor Corp |
| CV-0.50IN | 3/9 Design control — primary reference Great Plains Supply Co |
NSN 4820-01-486-5808 is a Valve,check, manufactured by Rotaryaire Compressor Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-486-5808 has 1 manufacturer part number on file: CV-1/2IN (Rotaryaire Compressor Corp).
Key specifications for CV-1/2IN: Mounting Position: HORIZONTAL; Connection Type: UNTHREADED EXTERNAL PIPE ALL ENDS; Style Designator: STRAIGHT THRU Y-PATTERN; Special Features: AIR FLOW SYSTEM. 4 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.