The Valve,expansion, cataloged under National Stock Number 4820-01-220-5573, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-220-5573 |
| Item Name | Valve,expansion |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | BALL |
| Valve Equalizer Location | INTERNAL |
| First End Thread Direction | RIGHT-HAND |
| Temp Rating | 100.0 FAHRENHEIT DEGF |
| Second End Relationship with First End | NOT IDENTICAL |
| Body Style | ANGLE GIVE "ADQM" OR "ADQN" IF FLANGED ONE OR TWO ENDS |
| First End Seat Angle in Deg | 37.0 |
| First End Thread Class | 3A A |
| First End Style Designator | FLARED |
| Refrigeration Capacity in Btu Per Hour | 18.0 |
| End Connection Quantity | 2 |
| First End Connection Type | THREADED EXTERNAL TUBE |
| First End Outside Diameter Tube Accommodated | 0.250 INCHES NOMINAL IN |
| Material | COPPER ALLOY BODY |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | STEEL CORROSION RESISTING SEAT |
| Valve Expansion Control Type | PRESSURE |
| Valve Pressure Limiting Device | NOT INCLUDED |
| Adjustable Pressure Range | 0.0 TO 45.0 CAMERA MOUNT |
| 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 |
|---|---|
| 204CB5 | 5/9 Secondary reference U.S. Government activity |
| 204085 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 204257 | 3/9 Design control — primary reference Eaton Corp Controls Div |
NSN 4820-01-220-5573 is a Valve,expansion, classified under FSC 4820, Valves, Nonpowered. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 6515-01-468-0844, 2990-01-520-4091. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-220-5573: Flow Control Device: BALL; Valve Equalizer Location: INTERNAL; First End Thread Direction: RIGHT-HAND; Temp Rating: 100.0 FAHRENHEIT DEGF. 19 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.