The Valve,expansion, cataloged under National Stock Number 4820-00-972-7519, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-972-7519 |
| Item Name | Valve,expansion |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Valve Equalizer Location | EXTERNAL |
| Body Style | STRAIGHT THRU |
| Valve Equalizer Connection Diameter | 0.250 INCHES NOMINAL IN |
| Mounting Method | WELL BULB |
| Capillary Tube Length | 5.000 INCHES NOMINAL IN |
| Bulb Media Type | REFRIGERANT 12 |
| Material | COPPER ALLOY BODY |
| Valve Expansion Control Type | THERMOSTATIC |
| Media for Which Designed | REFRIGERANT 12 |
| Valve Equalizer Connection Type | FLARED 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 |
|---|---|
| 604861 | 3/9 Design control — primary reference U.S. Government activity |
| 604861 | 5/9 Secondary reference Drs Environmental Systems Inc |
| 604861 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-00-972-7519 is a Valve,expansion, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 1680-01-602-3220. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-00-972-7519: Valve Equalizer Location: EXTERNAL; Body Style: STRAIGHT THRU; Valve Equalizer Connection Diameter: 0.250 INCHES NOMINAL IN; Mounting Method: WELL BULB. 11 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.