Large Diameter Double Sphere Rubber Joint

• Double sphere geometry delivers larger axial and lateral displacement than equivalent single-sphere large-bore joints
• Smooth full-bore flow path minimizes head loss for high-volume water transfer and sewage applications
• One-piece vulcanized rubber construction ensures consistent sealing across the full large-diameter face
• Designed for municipal water supply trunks and long-distance water diversion pipelines

This double-sphere rubber joint operates on municipal urban water supply trunk mains, compensating ground settlement caused shift plus thermally driven pipe expansion while attenuating vibration originating from high-volume water flow. It also installs on large-bore pipelines belonging to long-distance inter-basin water diversion projects, absorbing assembly alignment deviations and lowering joint leakage probability for critical water transfer infrastructure.

Henan Fuwei Pipeline Equipment Manufacturing Co., Ltd. modifies inter-sphere spacing to tune displacement compensation travel matching actual project site requirements. Engineers configure different rubber material compounds and pressure class ratings; optional auxiliary hardware includes limit rods and reinforcing rings, and designs adapt for municipal and water conservancy trunk main application scenarios. Custom sample development takes 15–20 day cycles with an MOQ set to 10 units.

Large-bore hydrostatic test benches validate sealing performance. Dedicated displacement compensation functional trials plus one-piece vulcanisation structural strength testing verify anti-tearing capacity under large-displacement working circumstances. Every finished unit completes full pre-shipment inspection, third-party inspection is acceptable, and products carry a 24-month warranty.

Protective padding strips sit between two spherical sections, and full-face sealing surfaces receive dedicated protective plates. Custom-built heavy-duty wooden crates contain internal reinforcing framing preventing sphere compressive deformation and flange surface collision damage. Crate surfaces mark lifting point locations guiding heavy lifting equipment handling operations. Standard 20-foot container orders complete within 30-day production cycles, and custom-built large-bore goods follow a 40–50 day lead time.

• NBR, EPDM and PTFE-lined material options are available for different media
• Double sphere design recommended for high settlement / high displacement locations
• Volume pricing is available for large infrastructure project quantities

Submit your pipeline bore size, expected displacement magnitude and medium type information; sales resources will provide product type comparison advice and project-oriented quotations.

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