Mechanical seals
Gaskets and similar joints of metal sheeting combined with other material or of two or more layers of metal; sets or assortments of gaskets and similar joints, dissimilar in composition, put up in pouches, envelopes or similar packings; mechanical seals. > Mechanical seals > Mechanical seals
Duty Rate (from China)
Subheadings
Products classified under Tariff item 8484.20.00
API 682 Compliant Mechanical Seal
> A pressurized dual mechanical seal designed to meet API 682 standards for refinery pump applications. It ensures emission control in volatile service by providing a robust sealing solution between rotating and stationary faces. This product falls under tariff item 8484.20.00 as a mechanical seal, which is essential for preventing leaks in demanding industrial environments.
Bellows Mechanical Seal
> A bellows mechanical seal using metal or elastomeric bellows to provide axial movement for sealing in agitators and mixers. It uses mechanical faces with bellows for pressure compensation, making it suitable for corrosive environments. This product is classified under tariff item 8484.20.00 as a mechanical seal, which is designed to prevent fluid leakage in rotating equipment.
Cartridge Type Mechanical Seal
> A pre-assembled cartridge mechanical seal that installs as a single unit onto pump shafts, simplifying maintenance in chemical processing equipment. It provides a mechanical sealing action using spring-loaded faces to prevent leaks. This product falls under tariff item 8484.20.00 as a mechanical seal, which is a critical component for pump reliability.
Cryogenic Service Mechanical Seal
> A mechanical seal with perfluoroelastomer seals designed for LNG pump applications at -160°C. It prevents boil-off in cryogenic fluids by maintaining a tight seal under extreme cold conditions. This product is classified under tariff item 8484.20.00 as a mechanical seal, which is essential for cryogenic service.
Crystal Puller Rotary Mechanical Seal
> A rotary mechanical seal for Czochralski crystal puller rotation mechanisms in silicon boule production. It withstands high vacuum and temperature cycles, ensuring a reliable seal in semiconductor manufacturing. This product falls under tariff item 8484.20.00 as a mechanical seal, which is critical for crystal growth equipment.
Double Mechanical Seal Arrangement
> A tandem or back-to-back double mechanical seal with barrier fluid provisions for hazardous fluid handling in petrochemical pumps. It provides redundancy by using dual faces to prevent leaks. This product is classified under tariff item 8484.20.00 as a mechanical seal, which is designed for high-risk applications.
Gallium Arsenide Wafer Polisher Seal
> A mechanical seal for chemical mechanical polishing (CMP) of gallium arsenide compound semiconductor wafers. It uses alkaline slurries for polishing, requiring a seal that resists corrosive chemicals. This product falls under tariff item 8484.20.00 as a mechanical seal, which is essential for wafer preparation equipment.
High Temperature Mechanical Seal
> A mechanical seal with graphite secondary seals for temperatures exceeding 400°C in furnace circulator pumps. It is critical for heat transfer fluid systems, providing a reliable seal under extreme heat. This product is classified under tariff item 8484.20.00 as a mechanical seal, which is designed for high-temperature service.
Pusher Type Mechanical Shaft Seal
> A spring-loaded pusher mechanical seal where sealing faces slide axially along the shaft in water pumps. It is common in HVAC and general water circulation systems, providing a simple and effective sealing solution. This product falls under tariff item 8484.20.00 as a mechanical seal, which is widely used in industrial pumps.
Silicon Wafer Lapper Mechanical Seal
> A mechanical seal for lapping machine platens processing silicon wafers to exact thickness tolerances. It is critical for surface flatness before polishing, ensuring precision in semiconductor manufacturing. This product is classified under tariff item 8484.20.00 as a mechanical seal, which is essential for wafer preparation.
Single Spring Mechanical Face Seal
> A mechanical seal featuring a single spring mechanism to maintain contact between rotating and stationary sealing faces. It is commonly used in industrial pumps, providing a reliable seal for various fluids. This product falls under tariff item 8484.20.00 as a mechanical seal, which is designed for general pump applications.
Split Axial Mechanical Seal
> A clamshell split mechanical seal for in-situ installation on large slurry pumps without shaft removal. It is used in mining and dredging operations, providing a reliable seal in abrasive services. This product is classified under tariff item 8484.20.00 as a mechanical seal, which is designed for heavy-duty applications.
Stationary Seat Mechanical Seal
> A mechanical seal with a stationary seat design where only the rotating face moves, used in high-speed turbines. It reduces wear in continuous duty applications, providing a durable sealing solution. This product falls under tariff item 8484.20.00 as a mechanical seal, which is critical for turbine operations.
Wafer Grinder Spindle Mechanical Seal
> A precision mechanical seal for semiconductor wafer grinder spindles, preventing slurry contamination. It maintains spindle integrity during grinding processes, ensuring high-quality wafer production. This product is classified under tariff item 8484.20.00 as a mechanical seal, which is essential for semiconductor processing.
Wafer Slicing Saw Coolant Mechanical Seal
> A mechanical seal containing diamond slurry coolant in wire saws slicing semiconductor wafers from boules. It ensures precise kerf-less slicing, maintaining the integrity of the cutting process. This product falls under tariff item 8484.20.00 as a mechanical seal, which is critical for wafer preparation equipment.