The Valve,expansion, cataloged under National Stock Number 4820-01-172-2089, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-172-2089 |
| Item Name | Valve,expansion |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | DIAPHRAGM |
| Valve Equalizer Location | EXTERNAL |
| Second End Relationship with First End | IDENTICAL |
| Body Style | STRAIGHT THRU |
| First End Style Designator | SOCKET |
| Valve Equalizer Connection Diameter | 0.500 INCHES NOMINAL IN |
| Refrigeration Capacity in Btu Per Hour | 90.0 |
| End Connection Quantity | 2 |
| First End Connection Type | UNTHREADED INTERNAL TUBE |
| First End Outside Diameter Tube Accommodated | 0.375 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING BODY |
| Valve Expansion Control Type | PRESSURE |
| Media for Which Designed | REFRIGERANT 22 |
| Valve Equalizer Connection Type | SOLDER TUBE |
| Valve Pressure Limiting Device | NOT INCLUDED |
| 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 |
|---|---|
| 328-VEA-3-K100-9 | 5/9 Secondary reference U.S. Government activity |
| 18232 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-172-2089 is a Valve,expansion, classified under FSC 4820, Valves, Nonpowered. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5930-01-240-8307, 4820-01-708-4428. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-172-2089: Flow Control Device: DIAPHRAGM; Valve Equalizer Location: EXTERNAL; Second End Relationship with First End: IDENTICAL; Body Style: STRAIGHT THRU. 15 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.