The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-018-8148, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Raytheon Company Dba Raytheon Co. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-018-8148 |
| Primary Part Number | 2888231-1 |
| Item Name | Valve,regulating,temperature |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Raytheon Company Dba Raytheon Co |
| Status | ACTIVE |
| Flow Control Device | DOUBLE SEATED |
| Two-Way Valve Action | REVERSE ACTING |
| Body Style | TEE |
| Bulb Length | 20.750 INCHES MINIMUM AND 21.000 INCHES MAXIMUM IN |
| Bulb Diameter | 0.938 INCHES NOMINAL IN |
| Temp Rating | 400.0 FAHRENHEIT MAXIMUM DEGF |
| Supplementary Features | THIS ITEM HAS BEEN REVIEWED FOR ASBESTOS MATERIAL;THE CURRENT APPROVED SOURCES; 3B150 HAVE INDICATED THEIR PART NUMBER CONTAINED ASBESTOS PRIOR TO 1984,THEY CONTINUE TO MANUFACTURE THE SAME PART NUMBER WITHOUT ASBESTOS MATERIAL AFTER 1984 |
| End Connection Quantity | 3 |
| Mounting Facility | INTERNAL THREAD |
| Capillary Tube Length | 96.000 INCHES MINIMUM AND 102.000 INCHES MAXIMUM IN |
| Temp Adjustability | NOT ADJUSTABLE |
| Thermostatic Element | STRAP TO PIPE |
| Material | COPPER ALLOY BODY |
| Material | COPPER BULB |
| Material | COPPER ALLOY SEAT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 2888231-1 | Raytheon Company (USA) |
| 2888231-1 PRIMARY | Raytheon Company Dba Raytheon Co (USA) |
| Reference | Meaning |
|---|---|
| 595-3669 | 5/9 Secondary reference U.S. Government activity |
| 6505190 | 5/9 Secondary reference Watts Water Technologies Inc |
| 595-WM075TM C08DN03 | 5/9 Secondary reference Watts Water Technologies Inc |
| 595-WM075M C08DN03 | 5/9 Secondary reference Watts Water Technologies Inc |
| 2888231-1 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| 2888231-1 | 5/9 Secondary reference Raytheon Company Div Corp |
NSN 4820-01-018-8148 is a Valve,regulating,temperature, manufactured by Raytheon Company Dba Raytheon Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-018-8148 has 2 manufacturer part numbers on file: 2888231-1 (Raytheon Company), 2888231-1 (Raytheon Company Dba Raytheon Co).
Key specifications for 2888231-1: Flow Control Device: DOUBLE SEATED; Two-Way Valve Action: REVERSE ACTING; Body Style: TEE; Bulb Length: 20.750 INCHES MINIMUM AND 21.000 INCHES MAXIMUM IN. 15 specifications are documented in the U.S. Government catalog.
Hazardous per DLA record (HMIC Y). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 4820-01-018-8148 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.