The Valve,expansion, cataloged under National Stock Number 4820-01-078-0345, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Triumph Thermal Systems - Maryland, Inc.. Government technical data includes 11 specifications, 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 | 4820-01-078-0345 |
| Primary Part Number | 77738017-3 |
| Item Name | Valve,expansion |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Triumph Thermal Systems - Maryland, Inc. |
| Status | ACTIVE |
| Flow Control Device | ANY ACCEPTABLE |
| Valve Equalizer Location | EXTERNAL |
| Body Style | ANGLE GIVE "ADQM" OR "ADQN" IF FLANGED ONE OR TWO ENDS |
| Bulb Length | 2.970 INCHES NOMINAL IN |
| Bulb Diameter | 0.500 INCHES NOMINAL IN |
| First Connection Face to Centerline Distance | 2.470 INCHES NOMINAL IN |
| End Connection Quantity | 2 |
| Second Connection Face to Centerline Distance | 1.540 INCHES NOMINAL IN |
| Capillary Tube Length | 18.000 INCHES NOMINAL IN |
| Valve Evaporator Temp Range Designation | HIGH |
| Valve Expansion Control Type | THERMOSTATIC |
| 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 |
|---|---|
| 77738017-3 PRIMARY | Triumph Thermal Systems - Maryland, Inc. (USA) |
NSN 4820-01-078-0345 is a Valve,expansion, manufactured by Triumph Thermal Systems - Maryland, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-078-0345 has 1 manufacturer part number on file: 77738017-3 (Triumph Thermal Systems - Maryland, Inc.).
Key specifications for 77738017-3: Flow Control Device: ANY ACCEPTABLE; Valve Equalizer Location: EXTERNAL; Body Style: ANGLE GIVE "ADQM" OR "ADQN" IF FLANGED ONE OR TWO ENDS; Bulb Length: 2.970 INCHES NOMINAL IN. 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.