DN100 NBR Double Spheres Floating Flanged Rubber Expansion Joint Connector

Key Features
Double Sphere Design: The double-sphere configuration provides greater flexibility and a larger movement range compared to single-sphere joints. It effectively compensates for axial, lateral, and angular displacements caused by thermal changes, ground settlement, or installation tolerances.
Floating Flange Construction: The floating flanged ends allow easy rotation and alignment during installation, reducing assembly time and minimizing stress on the pipeline. This design also ensures a secure and leak-free connection to mating flanges.
NBR Rubber Material: The tube and cover are made of NBR (Nitrile Butadiene Rubber), which offers excellent resistance to oils, fuels, greases, and aliphatic hydrocarbons. NBR also provides good aging resistance, abrasion resistance, and reliable performance in temperatures ranging from approximately -20°C to 80°C, depending on the specific medium and operating conditions.
High Strength Reinforcement: The joint is reinforced with multiple layers of high-tensile synthetic cord fabric, giving it excellent pressure resistance and dimensional stability under demanding operating conditions.
Durable and Long-Lasting: The robust construction ensures a long service life with minimal maintenance, making it a cost-effective solution for both new installations and retrofit projects.
Technical Specifications
Nominal Diameter: DN250 (250 mm)
Type: Double Spheres, Floating Flanged
Rubber Material: NBR (Nitrile Butadiene Rubber)
Reinforcement: Multi-layer synthetic cord fabric
Flange Standard: Compatible with DIN, ANSI, JIS, or EN standards upon request
Working Pressure: Typically 1.0 MPa to 1.6 MPa, depending on configuration
Working Temperature: -20°C to 80°C (subject to medium and application)
Applicable Media: Water, seawater, oils, fuels, lubricants, and other fluids compatible with NBR
Movement Capability: Axial compression and extension, lateral displacement, and angular deflection
Applications
This DN250 NBR double-sphere floating flanged rubber expansion joint is suitable for a wide range of piping systems, including:
Water supply and wastewater treatment plants
Heating, ventilation, and air conditioning (HVAC) systems
Chemical and petrochemical processing
Oil and fuel transfer lines
Marine and offshore piping systems
Industrial pump and compressor connections
Power plants and cooling water circuits
Installation Notes
Ensure that the pipeline is properly aligned before installing the expansion joint. Do not use the joint to correct major misalignment.
Tighten flange bolts evenly and gradually in a diagonal pattern to avoid uneven stress on the rubber body.
Do not exceed the rated pressure, temperature, or movement limits specified for the product.
Inspect the joint periodically for signs of wear, cracking, or leakage, and replace it if necessary.
Conclusion
The DN250 NBR Double Spheres Floating Flanged Rubber Expansion Joint Connector combines flexibility, durability, and reliable sealing performance in a compact and easy-to-install design. Its NBR construction makes it particularly suitable for applications involving oils and fuels, while the double-sphere floating flange design ensures excellent movement compensation and long-term service in demanding piping systems.