The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-189-3237, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Johnson Controls, Inc Div Building Efficiency. Government technical data includes 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-189-3237 |
| Primary Part Number | V47AD2 |
| Item Name | Valve,regulating,temperature |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Johnson Controls, Inc Div Building Efficiency |
| Status | ACTIVE |
| Flow Control Device | DISK, CIRCULAR |
| First End Thread Direction | RIGHT-HAND |
| Second End Relationship with First End | IDENTICAL |
| Body Style | STRAIGHT THRU |
| First End Style Designator | PLAIN |
| Bulb Length | 6.000 INCHES NOMINAL IN |
| Bulb Diameter | 0.688 INCHES NOMINAL IN |
| End Connection Quantity | 2 |
| Capillary Tube Length | 36.000 INCHES NOMINAL IN |
| First End Connection Type | THREADED INTERNAL PIPE |
| Temp Adjustability | ADJUSTABLE |
| Thermostatic Element | LIQUID IMMERSION TYPE |
| Material | COPPER ALLOY BODY |
| Material | COPPER BULB |
| Thread Size and Series/type Designator | 1-11-1/2 NPT FIRST END |
| 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 |
|---|---|
| V47AD2 PRIMARY | Johnson Controls, Inc Div Building Efficiency (USA) |
| Reference | Meaning |
|---|---|
| 332-2830 | D/9 Drawing number reference only Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
NSN 4820-01-189-3237 is a Valve,regulating,temperature, manufactured by Johnson Controls, Inc Div Building Efficiency, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-189-3237 has 1 manufacturer part number on file: V47AD2 (Johnson Controls, Inc Div Building Efficiency).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-189-3285. Verify interchangeability with system specifications before substitution.
Key specifications for V47AD2: Flow Control Device: DISK, CIRCULAR; First End Thread Direction: RIGHT-HAND; Second End Relationship with First End: IDENTICAL; Body Style: STRAIGHT THRU. 15 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.