Found 5 matching results
(CN → US)
| HS Code | Official Doc | Tariff Rate | Origin | Destination | Effective Date |
|---|---|---|---|---|---|
| 8484100000 | Doc | 57.5% | CN | US | 2025-05-12 |
| 8484200000 | Doc | 58.9% | CN | US | 2025-05-12 |
| 4016931010 | Doc | 57.5% | CN | US | 2025-05-12 |
| 4016931020 | Doc | 57.5% | CN | US | 2025-05-12 |
| 4006905000 | Doc | 57.7% | CN | US | 2025-05-12 |
Seal Set
A seal set is a collection of components designed to prevent leakage of fluids or gases within a machine or assembly. They are critical for maintaining pressure, preventing contamination, and ensuring efficient operation across a wide range of applications.
Material
Seal sets are manufactured from a diverse range of materials, selected based on the fluid being sealed, temperature, pressure, and expected lifespan. Common materials include:
- Elastomers:
- Nitrile Rubber (NBR): Excellent resistance to oil, fuels, and hydraulic fluids; a common, general-purpose material.
- Viton (FKM): Superior resistance to high temperatures, chemicals, and harsh environments.
- Ethylene Propylene Diene Monomer (EPDM): Good resistance to water, steam, and weathering; often used in water and brake systems.
- Silicone Rubber (VMQ): Excellent temperature resistance and flexibility; suitable for food and pharmaceutical applications.
- Polyurethane (PU): High abrasion resistance and load-bearing capacity.
- Polymers:
- Polytetrafluoroethylene (PTFE/Teflon): Exceptional chemical resistance and low friction; used in aggressive environments.
- Polyoxymethylene (POM/Acetal): Good wear resistance and dimensional stability.
- Nylon (PA): High strength and wear resistance.
- Metals:
- Steel: Used for spring energizers or in applications requiring high pressure.
- Stainless Steel: Corrosion resistance for specific fluid compatibility.
Purpose
The primary purpose of a seal set is to:
- Prevent Leakage: Contain fluids (liquids or gases) within a system.
- Exclude Contaminants: Protect internal components from dirt, dust, and other external particles.
- Maintain Pressure: Ensure consistent pressure levels for optimal performance.
- Reduce Friction: Minimize wear and tear on moving parts.
Function
Seal sets function by creating a barrier between two surfaces. They achieve this through:
- Compression: Elastomeric seals are compressed to create a tight fit.
- Interference Fit: Some seals rely on a slight interference between the seal and the mating surfaces.
- Spring Energy: Spring-energized seals use springs to maintain constant pressure.
- Surface Tension: Certain seals utilize surface tension to create a barrier.
Usage Scenarios
Seal sets are employed across numerous industries and applications, including:
- Automotive: Engine seals, transmission seals, hydraulic system seals.
- Aerospace: Fuel system seals, hydraulic system seals, pneumatic system seals.
- Hydraulics & Pneumatics: Cylinder seals, piston seals, rod seals, valve seals.
- Manufacturing: Pump seals, valve seals, rotary seals.
- Oil & Gas: Downhole seals, pipeline seals, pump seals.
- Food & Beverage: Pump seals, valve seals, mixing equipment seals (often utilizing FDA-compliant materials).
Common Types
- O-Rings: Simple, versatile circular seals used in static and dynamic applications.
- Lip Seals (Shaft Seals): Used to seal rotating shafts; often include a spring for constant pressure.
- U-Cups: Used in hydraulic cylinders; provide a good sealing force.
- V-Rings: Used to seal rotating shafts, often in dusty environments.
- Back-up Rings: Used with O-rings to prevent extrusion under high pressure.
- Wipers: Used to remove contaminants from surfaces.
- Square Rings: Used in static applications.
- Custom Seals: Designed for specific applications with unique requirements.
The declared goods, “seal set,” encompass collections of sealing components. Based on the provided information, several HS codes may be applicable depending on the composition and application of the set.
Here are the relevant HS codes:
- 8484100000: This code covers 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. This is applicable if the seal set includes metal gaskets or a combination of metal and other materials, packaged as a set. The total tax rate is 57.5% (Base tariff: 2.5%, Additional tariff: 25.0%, Post 2025.4.2 Additional tariff: 30.0%).
- 8484200000: This code covers 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, specifically mechanical seals. If the set primarily consists of mechanical seals, this code applies. The total tax rate is 58.9% (Base tariff: 3.9%, Additional tariff: 25.0%, Post 2025.4.2 Additional tariff: 30.0%).
- 4016931010: This code covers other articles of vulcanized rubber other than hard rubber; other; gaskets, washers and other seals; of a kind used in the automotive goods of chapter 87, specifically O-Rings. If the seal set contains O-rings intended for automotive applications, this code is relevant. The total tax rate is 57.5% (Base tariff: 2.5%, Additional tariff: 25.0%, Post 2025.4.2 Additional tariff: 30.0%).
- 4016931020: This code covers other articles of vulcanized rubber other than hard rubber; other; gaskets, washers and other seals; of a kind used in the automotive goods of chapter 87, specifically Oil seals. If the set includes oil seals designed for automotive use, this code applies. The total tax rate is 57.5% (Base tariff: 2.5%, Additional tariff: 25.0%, Post 2025.4.2 Additional tariff: 30.0%).
- 4006905000: This code covers other forms (for example, rods, tubes and profile shapes) and articles (for example, discs and rings), of unvulcanized rubber; other; other. This code is applicable for seal sets made of unvulcanized rubber, categorized as 'other'. The total tax rate is 57.7% (Base tariff: 2.7%, Additional tariff: 25.0%, Post 2025.4.2 Additional tariff: 30.0%).
It is important to determine the primary material and intended application of the seal set to select the most accurate HS code. If the seal set is intended for automotive use, codes 4016931010 and 4016931020 should be considered. If the set contains a mix of materials, 8484100000 may be appropriate.