The Actuator,thermal Lk, cataloged under National Stock Number 4820-01-481-3814, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-481-3814 |
| Item Name | Actuator,thermal Lk |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| FSC Application Data | VALVE,BALL FIRE SAFE |
| General Characteristics Item Description | PART NUMBER BREAKDOWN: TA0003=LARGE ACTUATOR; X=ACTUATOR SUPPLIED W/BRACKETS, COUPLER, MOUNTED TO VALVE (THEIRS OR SUPPLIED TO THEM); 212 DEG F=PREDETERMINED SET TEMPERATURE; FOR JAMESBURY VALVE P/N 3-7150-31-2236TTT1 DEGF |
| Extra Long Reference Number | TA0003X 212 DEG F FOR 3-7150-31-2236TTT1 DEGF |
| Accessory Components and Quantity | ACTUATOR 1, FUSIBLE LINK 1 |
| Functional Description | FUSIBLE LINK SHUT OFF VALVE ACTUATOR IS A SELF CONTAINED, SPRING LOADED DEVICE THAT WILL AUTOMATICALLY SHUT OFF OR OPEN FIRE-SAFE BALL VAVLES. HEAT ACTUATED THERMAL LINKS WILL MELT AND VALVE WILL CLOSE AT PREDETERMINED TEMPERATURE (212 DEG.) |
| Material | STEEL CORROSION RESISTING |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY EXTRA LONG REFERENCE NUMBER |
| 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 |
|---|---|
| TA0003X | 5/1 Secondary reference Essex Industries Inc |
| TA0003X 212 DEG F FOR 3-7150-31- | 3/1 Design control — primary reference Essex Industries Inc |
NSN 4820-01-481-3814 is a Actuator,thermal Lk, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-481-3814: FSC Application Data: VALVE,BALL FIRE SAFE; General Characteristics Item Description: PART NUMBER BREAKDOWN: TA0003=LARGE ACTUATOR; X=ACTUATOR SUPPLIED W/BRACKETS, COUPLER, MOUNTED TO VALVE (THEIRS OR SUPPLIED TO THEM); 212 DEG F=PREDETERMINED SET TEMPERATURE; FOR JAMESBURY VALVE P/N 3-7150-31-2236TTT1 DEGF; Extra Long Reference Number: TA0003X 212 DEG F FOR 3-7150-31-2236TTT1 DEGF; Accessory Components and Quantity: ACTUATOR 1, FUSIBLE LINK 1. 7 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.