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    Double Sphere Expansion Rubber Joint.jpg
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    China Double Sphere Rubber Expansion Joint Factory Suppliers - ANSI, DIN, BS Compliant Flanged Design

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    Introducing our high-quality double sphere joint flange type, expertly designed according to ANSI, DIN, and BS standards.

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    This product features a robust main body constructed from durable materials such as EPDM, NBR, and neoprene, ensuring long-lasting performance and reliability.

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    The lining employs Chinlon cord fabrics, providing additional strength and resistance to wear.

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    We utilize hard steel wires in the frame for enhanced structural integrity, making it suitable for various applications.

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    Our flanges are available in both carbon steel and stainless steel options, catering to diverse needs and preferences.

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    Additionally, the union is made of malleable iron to ensure secure connections.

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    Sizes range from 1/2 to 24, making it a versatile choice for many industries.

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    As a leading China supplier and factory, we are committed to providing top-notch products to meet your needs.

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      Contact us
      Product Details

      Description

      The Double Ball Rubber Expansion Joint is engineered to absorb vibrations, reduce noise, and compensate for thermal expansion in industrial piping systems and water networks. Its dual-sphere design enhances flexibility, providing superior movement absorption compared to single-ball models. This makes it ideal for applications where greater axial, lateral, and angular displacement is required.

      Made from high-quality rubber materials such as EPDM, NBR, or Neoprene, and reinforced with strong synthetic fabric, this joint is built for durability and resistance to pressure, temperature, and corrosion. It is commonly used in HVAC systems, wastewater treatment, chemical plants, and pump installations.

      The Double Ball Rubber Expansion Joint offers easy installation with flanged or threaded ends, and is compatible with a variety of pipeline materials. Its robust construction helps extend system life by reducing mechanical stress on connected components.

      As a leading rubber joint manufacturer in China, we provide reliable expansion joint solutions designed for demanding industrial environments.

      🔧
      Vibration & Noise Absorption
      🌡️
      Thermal Expansion Compensation
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      EPDM / NBR / Neoprene Materials
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      HVAC, Wastewater & Chemical Plants
      ⚙️
      Easy Flanged / Threaded Installation
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      Standard Materials Of Main Parts
      ITEM PART NAME MATERIAL
      1 Sphere EPDM/NBR
      2 Flange CS
      Dimensions: (mm)
      SIZE Axial Displacement Lateral Displacement Pn16 Pn10
      in DN L Stretch Compression Lateral Displacement D D1 n-d1 D D1 n-d1
      2 50 165 30 50 45 165 125 4-18 165 125 4-18
      2.5 65 175 30 50 45 185 145 4-18 185 145 4-18
      3 80 175 35 50 45 200 160 8-18 200 160 8-18
      4 100 225 35 50 40 220 180 8-18 220 180 8-18
      5 125 225 35 50 40 250 120 8-18 250 210 8-18
      6 150 225 35 50 40 285 240 8-23 285 240 8-23
      8 200 325 35 50 40 340 295 12-23 340 295 8-23
      10 250 325 35 60 35 405 355 12-27 395 350 12-23
      12 300 325 35 60 35 460 410 12-27 445 400 12-23
      14 350 325 35 60 40 520 470 16-27 505 460 16-23
      16 400 325 35 50 40 580 525 16-30 565 515 16-27
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      Frequently Asked Questions
      Q What is the advantage of a Double Ball Rubber Expansion Joint over a single ball type?
      The double ball design provides significantly greater axial, lateral, and angular displacement capacity compared to single-ball models. The dual-sphere configuration distributes movement more effectively, making it ideal for piping systems that experience high levels of vibration, thermal expansion, or misalignment.
      Q What rubber materials are available for the Double Ball Rubber Expansion Joint?
      The joint is available in EPDM, NBR (Nitrile), and Neoprene rubber compounds. EPDM is recommended for water and steam applications, NBR is suitable for oil and fuel systems, and Neoprene offers good general-purpose chemical resistance. The sphere material can be selected based on your specific media and temperature requirements.
      Q What pressure ratings are available for this expansion joint?
      The Double Ball Rubber Expansion Joint is available in both PN10 and PN16 pressure ratings, as shown in the dimension table above. The appropriate rating should be selected based on the operating pressure of your piping system to ensure safe and reliable performance.
      Q What are the typical applications for this product?
      This expansion joint is widely used in HVAC systems, water supply and wastewater treatment pipelines, chemical processing plants, pump installations, and industrial fluid transfer systems. Its ability to absorb vibration and compensate for thermal movement makes it suitable for a broad range of demanding industrial environments.
      Q What size range is available for the Double Ball Rubber Expansion Joint?
      The standard size range covers DN50 (2 inch) to DN400 (16 inch), as listed in the dimensions table. Custom sizes outside this range may be available upon request. Please contact us with your specific requirements for a tailored solution.
      Q How is the Double Ball Rubber Expansion Joint installed?
      Installation is straightforward using standard flanged connections, which are compatible with a wide variety of pipeline materials including carbon steel, stainless steel, and PVC. Ensure the joint is installed without pre-compression or pre-extension beyond the specified limits, and that control rods are used where required by system design to prevent over-extension under pressure.

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