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Help CenterEPDM Double Sphere Flexible Rubber Expansion Joint With Flange Connector for Axial Movement Compensation
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Hebei Speed Torque Transmission Technology Co., Ltd. takes pride in presenting our EPDM Double Sphere Flexible Rubber Expansion Joint with Flange Connector for Axial Movement Compensation — a robust solution engineered to absorb pipeline stress, reduce vibration, and correct misalignment in demanding industrial systems. Manufactured in our 3,000–5,000 square meter facility in Cangzhou, China, this expansion joint combines high-grade EPDM rubber with precision-machined flanges to deliver long-lasting flexibility and leak-proof performance. Whether you are managing water treatment lines, HVAC systems, or chemical transfer networks, our double-sphere design offers excellent axial movement compensation while protecting connected equipment from damaging forces.
Key Features & Technical Specifications
Our double sphere rubber expansion joint is built to handle substantial axial deflection while maintaining full pressure integrity. The EPDM compound provides outstanding resistance to ozone, weathering, dilute acids, and high temperatures, making it suitable for a wide range of media including water, seawater, and certain chemicals. The flange connector simplifies installation and ensures a secure, gasket-free seal when bolted to standard pipe flanges.
Double sphere geometry — increases flexibility and reduces stress concentrations, allowing larger axial and lateral movements compared to single sphere designs.
EPDM rubber membrane — offers excellent elasticity, abrasion resistance, and temperature tolerance from −40°C to +120°C (dependent on media and pressure).
Reinforced construction — multiple nylon cord layers embedded in the rubber provide high burst strength and dimensional stability.
Carbon steel flanges — drilled according to standard bolt patterns (ANSI, DIN, JIS, or custom) for easy bolt-on installation.
Pre-set control rods — available as an option to limit excessive movement and prevent over-extension during pressure surges.
Low stiffness — minimizes transmitted vibration and noise, protecting pumps, compressors, and valves from fatigue.
Compact axial length — saves valuable piping space and simplifies retrofit in existing systems.
Typical Performance Parameters (Reference Values)
| Parameter | Value / Range |
|---|---|
| Nominal Diameter (DN) | DN25 – DN600 (larger sizes on request) |
| Working Pressure | PN10 / PN16 (bar) depending on size and reinforcement |
| Axial Compression Movement | 20 – 45 mm (varies with DN and pressure) |
| Axial Elongation Movement | 10 – 30 mm (varies with DN and pressure) |
| Lateral Movement (±) | 10 – 35 mm (varies with DN) |
| Angular Deflection (±) | 10° – 25° per plane |
| Temperature Range | −40°C to +120°C (EPDM), media dependent |
| Flange Standards | ANSI 150, DIN PN10/PN16, JIS 10K/16K, or custom |
Benefits for Your Piping System
Prevents pipeline damage — absorbs thermal expansion and contraction, reducing stress on flanges and welded joints.
Reduces mechanical vibration — decouples equipment from rigid pipework, extending the service life of pumps and compressors.
Compensates for misalignment — accommodates minor piping misalignment during installation, saving time and lowering installation costs.
Corrosion-free performance — EPDM does not rust, and the rubber lining isolates the flange face from corrosive media.
Low maintenance — no moving parts, gaskets, or lubrication required; simple visual inspection is sufficient.
Versatile application — suitable for water supply, wastewater treatment, chemical processing, marine piping, HVAC, and power generation.
Why Choose Hebei Speed Torque Transmission Technology Co., Ltd.?
Since 2017, we have grown into a trusted manufacturer with a factory area of 3,000–5,000 square meters and a dedicated team of 101–200 employees. Our annual export value reaches US$5–10 million, serving markets across North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. We operate under an ISO9001 certified quality management system, ensuring consistent product quality and reliable production processes. Products are shipped from Port of Shanghai, Port of Tianjin, or Port of Qingdao with flexible delivery schedules to meet your project deadlines.
We understand that every piping system has unique requirements. That is why we offer customizable sizes, flange standards, and control rod configurations — all available upon request. Our engineering team can also provide technical recommendations based on your working pressure, temperature, and medium. With a focus on durability and performance, this EPDM double sphere rubber expansion joint is the reliable choice for your axial movement compensation needs. Contact us today for pricing, drawings, or samples — we are ready to support your next project.
FAQ
Q1: What is the maximum working pressure for this expansion joint?
The standard working pressure is PN10 or PN16, depending on the nominal diameter and reinforcement layers. For higher pressure requirements, please contact us to discuss a reinforced design that suits your system.Q2: Can the EPDM material handle hot water or steam?
EPDM can generally handle hot water up to 120°C, but steam applications require careful evaluation of pressure and temperature. We recommend sending your operating conditions so we can verify the suitability.Q3: What movements can this joint compensate for?
The double sphere design is primarily optimized for axial movement (compression and elongation), but it also provides lateral and angular flexibility. The exact values depend on size and pressure rating — refer to our performance table or request a datasheet.Q4: Are flanges available in different standards?
Yes. We supply ANSI, DIN, JIS, and custom flange drillings. Please specify your flange standard and bolt-hole pattern when ordering.Q5: Do you provide control rods or limit stops?
Control rods are available as an optional accessory to limit excessive axial movement and protect the joint from over-extension. You can select this feature when placing your order.Q6: How should this expansion joint be installed?
Installation is simple: bolt the flanges to the mating pipe flanges using the appropriate fasteners. Ensure that the joint is not twisted and that the nominal alignment is within the rated movement limits. For detailed instructions, we provide an installation manual with each shipment.Q7: What is the minimum order quantity?
There is no strict MOQ for standard sizes — we accept small orders for testing as well as bulk orders. For customized designs, please discuss minimum quantities with our sales team.
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