The Valve,butterfly, cataloged under National Stock Number 4820-01-623-0425, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-623-0425 |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Material | STEEL CORROSION RESISTING BODY |
| Material | STEEL CORROSION RESISTING STEM |
| 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 |
|---|---|
| 1.30 | 3/9 Design control — primary reference John W Hock Company Dba Hock, John W Co |
NSN 4820-01-623-0425 is a Valve,butterfly, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-623-0425: Special Features: GATE SYSTEM EMPLOYS A BUTTERFLY CHECK VALVE DOWNWIND OF THE MOTOR WHICH IS OPENED BY AIR FLOW FROM FAN ABOVE AND IS CLOSED BY COUNTR WEIGHTS; Part Name Assigned by Controlling Agency: AIR-ACTUATED GATE SYSTEM; End Item Identification: CDC MINIATURE LIGHT TRAP; Material: STEEL CORROSION RESISTING BODY. 2 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.