The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-530-2003, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-530-2003 |
| Item Name | Valve,regulating,temperature |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | BELLOWS |
| Second End Relationship with First End | IDENTICAL |
| Body Style | STRAIGHT THRU |
| Face to Face Distance | 11.500 INCHES NOMINAL IN |
| Temp Rating | 50.0 FAHRENHEIT MINIMUM AND 250.0 FAHRENHEIT MAXIMUM DEGF |
| End Connection Quantity | 2 |
| Valve Size | 1.500 INCHES IN |
| Capillary Tube Length | 120.000 INCHES NOMINAL IN |
| First End Connection Type | UNTHREADED INTERNAL PIPE |
| Thermostatic Element | INTEGRAL W/VALVE |
| First End Nominal Pipe Size Accommodated | 1.500 INCHES IN |
| Material | COPPER ALLOY BODY |
| Media for Which Designed | STEAM |
| 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 |
|---|---|
| AP-A-678 | D/9 Drawing number reference only U.S. Government activity |
| AP-A-678 ASSY CXT-N-122001-1.50 | 5/9 Secondary reference U.S. Government activity |
| CXT-N-122001-1.50 | 5/9 Secondary reference U.S. Government activity |
| 122001-1.50 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-530-2003 is a Valve,regulating,temperature, classified under FSC 4820, Valves, Nonpowered. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-530-2023, 4820-01-530-3525. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-530-2003: Flow Control Device: BELLOWS; Second End Relationship with First End: IDENTICAL; Body Style: STRAIGHT THRU; Face to Face Distance: 11.500 INCHES NOMINAL IN. 13 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.