WHO ARE WE?

Ningbo Heyuan Auto Parts Co., Ltd. is an integrated trade and manufacturing enterprise specializing in the production of various filters, including air filters, cabin filters, oil filters, diesel filters, gasoline filters, hydraulic filters, and special filters. NBHY produces over 50 million vehicle filtration systems and various filter elements annually, utilizing advanced plastic blow molding, rubber processing, and welding technologies, making it a diversified large-scale manufacturing base in China.

As a professional OEM Rubber Air Duct Manufacturer and ODM Rubber Air Duct Company, With 30 years of professional design and production experience, NBHY is equipped with modern large-scale production workshops, R&D, business, and office centers, we have strict production, testing equipment and assembly lines. All product development is carried out using computer-aided design, while production strictly adheres to the ISO/TS16949:2009 and ISO9001:2000 quality management systems. Our product quality is highly praised by customers domestically and internationally, with products exported to over a dozen countries and regions, including Europe, the Middle East, and Japan.

Currently, the company mainly provides processing and production services for domestic OEMs and well-known international brands, including over a dozen Fortune 500 companies, and has become an important supplier of filtration systems in China.

  • Industry Experience

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  • Modern Intelligent Factory

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  • Cooperating Automobile Enterprises

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  • Technical Engineers

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/ KEEP IN TOUCH

Feel free to ask for any info on NBHY.

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News

  • What are the functions of Oil Filter?

    2026-05-01

    What Are the Core Functions of an Oil Filter? The primary function of an oil filter is to remove contaminants from engine oil, including metal particles, dirt, soot, and sludge. By doing so, it ensures that only clean oil circulates through the engine, reduc...
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  • What Is the Blow Molding Component?

    2026-04-24

    A blow molding component refers to any individual part of a blow molding machine or mold that directly contributes to forming hollow plastic parts. The most critical component is the parison (or preform)—a tube of molten plastic that expands against a mold ca...
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  • How to Choose Rubber Air Duct?

    2026-04-17

    Choose Based on Temperature, Pressure, and Flexibility First For 90% of industrial and HVAC applications, the right rubber air duct is determined by three quantifiable factors: operating temperature range, maximum burst pressure, and bend radius. Do not start...
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Rubber Air Duct Industry knowledge

Factors of airflow efficiency considered in the design of Rubber Air Duct
1. Fluid dynamics optimization
Inner wall smoothness: The inner wall of the Rubber Air Duct is specially treated to reduce friction loss during fluid flow. The smooth inner wall can reduce airflow resistance and improve airflow efficiency.
Streamlined design: The shape of the Rubber Air Duct is designed to be streamlined to reduce the vortex of airflow at turns and joints, thereby improving the continuity and efficiency of airflow.
2. Material selection
Elasticity and pressure resistance: High-quality rubber materials are used to ensure good elasticity and shape stability under high temperature and high pressure conditions, so as not to affect the airflow path.
Chemical resistance: Materials with good tolerance to various chemicals (such as oil smoke, gasoline, etc.) are selected to ensure the durability and smooth airflow of the Rubber Air Duct in the actual working environment.
3. Appropriate diameter and length
Diameter design: According to the requirements of air flow, the diameter of the Rubber Air Duct is reasonably designed to avoid excessive airflow resistance due to too small a diameter, or unstable airflow due to too large a diameter.
Minimize length: Try to shorten the length of the duct to reduce the loss of airflow during transportation, while avoiding unnecessary joints and bends.
4. Joint and connection design
Seamless connection: The connection between the Rubber Air Duct and other components is designed as a seamless joint to reduce the interference of airflow at the joint.
Easy to install: The design takes into account the convenience of installation, ensuring that the connection between the Rubber Air Duct and the equipment is firm and not easy to leak, maintaining the stability of airflow.
5. Temperature resistance
High temperature design: For engines and other high temperature environments, high temperature resistant rubber materials are selected to ensure that they can still maintain good shape and performance at high temperatures and avoid airflow loss caused by thermal expansion.
6. Pressure test
Comprehensive testing: During the design stage, Ningbo Heyuan Auto Parts Co., Ltd. will conduct a series of airflow and pressure tests to ensure that the performance of the duct under various conditions meets the expected standards.