Single Spring Mechanical Face Seal
A mechanical seal featuring a single spring mechanism to maintain contact between rotating and stationary sealing faces, commonly used in industrial pumps. It falls under HTS 8484.20.00.00 as a mechanical seal designed for dynamic sealing applications in rotating equipment. These seals prevent leakage of fluids under pressure by balancing axial forces.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If supplied as part of a complete pump or compressor
Classified under gasket sets or static seals when imported as an assembled component rather than standalone mechanical seal.
If for use specifically in centrifugal pumps
Pump parts heading applies if the seal is dedicated solely to pumps and not general-purpose mechanical seals.
If incorporating measuring or controlling elements
Measuring instruments chapter covers seals with integrated sensors, shifting from pure mechanical seals.
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Import Tips & Compliance
• Verify seal material composition (e.g
• carbon, ceramic faces) for accurate HTS classification and ensure supplier provides certification
• Include detailed technical specs like pressure rating and shaft size in import documentation to avoid misclassification as parts
• Check for anti-dumping duties on seals from certain origins and maintain proof of end-use in machinery
Related Products under HTS 8484.20.00.00
Gallium Arsenide Wafer Polisher Seal
Mechanical seal for chemical mechanical polishing (CMP) of GaAs compound semiconductor wafers. Classified HTS 8484.20.00.00 under semiconductor statistical notes for wafer preparation equipment. Uses alkaline slurries for mirror finish.
Cartridge Type Mechanical Seal
Pre-assembled cartridge mechanical seal that installs as a single unit onto pump shafts, simplifying maintenance in chemical processing equipment. Classified under HTS 8484.20.00.00 for its mechanical sealing action using multiple sealing elements. Ideal for high-pressure applications requiring easy replacement.
Bellows Mechanical Seal
Metal or elastomeric bellows mechanical seal providing axial movement for sealing in agitators and mixers. Under HTS 8484.20.00.00 as it uses mechanical faces with bellows for pressure compensation. Suited for corrosive environments in pharmaceutical production.
Double Mechanical Seal Arrangement
Tandem or back-to-back double mechanical seals with barrier fluid provisions for hazardous fluid handling in petrochemical pumps. HTS 8484.20.00.00 covers these as mechanical seals despite dual faces. Provides redundancy for safety-critical applications.
Pusher Type Mechanical Shaft Seal
Spring-loaded pusher mechanical seal where sealing faces slide axially along the shaft in water pumps. Classified HTS 8484.20.00.00 for mechanical sealing mechanism. Common in HVAC and general water circulation systems.
Stationary Seat Mechanical Seal
Mechanical seal with stationary seat design where only the rotating face moves, used in high-speed turbines. HTS 8484.20.00.00 as mechanical seal variant. Reduces wear in continuous duty applications.