The Valve Assy,air Expansion, cataloged under National Stock Number 4820-00-137-8240, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Superior Air Products Co. Government technical data includes 1 specification, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-137-8240 |
| Primary Part Number | D5583-40 |
| Item Name | Valve Assy,air Expansion |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Superior Air Products Co |
| Status | ACTIVE |
| General Characteristics Item Description | ASSY CONSISTS OF 1 VALVE BODY,1 VALVE PIPE,1 PACKING BOX,1 SPINDLE,1 LOCK NUT,1 PACKING GLAND,1 PACKING NUT,1 DIAL INDICATOR,1 HAND WHEEL,3 SCREWS,1 FASTER,1 SET ORINGS,1 FLANGE ASSY,1 MOUNTING PLATE,1 H.P. PIPE; UNSCREWING THE PACKING NUT WITH THE VALVE UNDER PRESSURE WILL RESULT IN THE VALVE STEM BEING BLOWN OUT CAUSING POSSIBLE INJURY |
| 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 |
|---|---|
| D5583-40 PRIMARY | Superior Air Products Co (USA) |
NSN 4820-00-137-8240 is a Valve Assy,air Expansion, manufactured by Superior Air Products Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-137-8240 has 1 manufacturer part number on file: D5583-40 (Superior Air Products Co).
Key specifications for D5583-40: General Characteristics Item Description: ASSY CONSISTS OF 1 VALVE BODY,1 VALVE PIPE,1 PACKING BOX,1 SPINDLE,1 LOCK NUT,1 PACKING GLAND,1 PACKING NUT,1 DIAL INDICATOR,1 HAND WHEEL,3 SCREWS,1 FASTER,1 SET ORINGS,1 FLANGE ASSY,1 MOUNTING PLATE,1 H.P. PIPE; UNSCREWING THE PACKING NUT WITH THE VALVE UNDER PRESSURE WILL RESULT IN THE VALVE STEM BEING BLOWN OUT CAUSING POSSIBLE INJURY. 1 specification is 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.