Steam Turbine Emergency Overspeed Governor
Mechanical backup governors detecting rotor overspeed and triggering steam valve closure independently of electronics. HTS 8406.90.45 for other steam turbine parts. Redundant safety per nuclear plant requirements.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If standalone automatic control instruments
Pure control/monitoring devices classify in 9032 without mechanical action.
If backup safety for other turbine types
Governors follow their specific turbine heading classification.
If safety/relief valves only
If lacking speed sensing, simple valves go to 8481.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• NRC/ASME safety certification documents essential for clearance
• Functional test reports proving independent overspeed detection required
• Avoid 9032 classification by demonstrating mechanical turbine integration
Related Products under HTS 8406.90.45
Steam Turbine Rotor Assembly
A precision-engineered rotor assembly designed for high-speed rotation within steam turbines to convert thermal energy into mechanical power. Classified under HTS 8406.90.45 as a part of steam turbines, specifically under 'other' parts not covered by more specific subheadings. It is essential for power generation in industrial and utility applications.
Steam Turbine Nozzle Ring Assembly
Circular arrays of precision nozzles that accelerate steam into high-velocity jets impinging on turbine blades. HTS 8406.90.45 covers this as other parts of steam turbines, optimizing expansion efficiency. Critical for combined-cycle power plants.
Steam Turbine Blade Carrier Disc
Forged discs that serve as carriers for turbine blades, providing structural support in high-pressure stages. Classified as other parts under HTS 8406.90.45 for steam turbines. Vital for aerospace-derived industrial turbines.
Steam Turbine Exhaust Casing Section
Low-pressure casing segments directing exhaust steam to condensers, fabricated from specialized alloys. Under HTS 8406.90.45 as other parts of steam turbines. Key for vacuum efficiency in Rankine cycle plants.
Steam Turbine Generator Coupling
Flexible disc or gear-type couplings synchronizing turbine and generator shafts for grid-stable operation. HTS 8406.90.45 as other steam turbine parts. High misalignment tolerance for base-load plants.
Steam Turbine Thrust Bearing
Tilting pad thrust bearings absorbing axial loads from steam pressure differentials on rotors. Under HTS 8406.90.45 for other steam turbine parts. Oil-lubricated for continuous 24/7 operation.