The Valve,expansion, cataloged under National Stock Number 4820-01-520-3607, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is General Dynamics Land Systems Inc.. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-520-3607 |
| Primary Part Number | 12438496-1 |
| Item Name | Valve,expansion |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | General Dynamics Land Systems Inc. |
| Status | ACTIVE |
| Body Style | STRAIGHT THRU |
| End Connection Quantity | 4 |
| Valve Expansion Control Type | THERMOSTATIC |
| Media for Which Designed | REFRIGERANT |
| 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 |
|---|---|
| 12438496-1 PRIMARY | General Dynamics Land Systems Inc. (USA) |
| Reference | Meaning |
|---|---|
| 12438496 | D/9 Drawing number reference only General Dynamics Land Systems Inc. |
NSN 4820-01-520-3607 is a Valve,expansion, manufactured by General Dynamics Land Systems Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-520-3607 has 1 manufacturer part number on file: 12438496-1 (General Dynamics Land Systems Inc.).
Key specifications for 12438496-1: Body Style: STRAIGHT THRU; End Connection Quantity: 4; Special Features: RATED CAPACITY IN R-134C SYSTEM = 1.7 TONS AT 90 PSID 32 DEG F; MAXIMUM OPERATING PRESSURE 65 + OR - 5 PSIG; SUPERHEAT SETTING 8 - 12 DEG F; PROOF PRESSURE 425 PSIG MIN AT 200 DEG F MIN; BURST PRESSURE 850 PSIG MIN AT 200 DEG F MIN. SUGGESTED SORCE OF SUPPLY EATON CORPORATION AUTOMOTIVE CONTROLS DIV. 191 EAST NORTH AVE. CAROL STREAM, IL. 60188-2090 PART NO. 929-458 DEGF; Part Name Assigned by Controlling Agency: VALVE, THERMAL EXPANSION (TXV). 4 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.