Flanged Flexible Rubber Joint With Single Sphere

The Flanged Resilient Seated Gate Valve (NRS) is a durable, corrosion-resistant, and leak-proof valve widely used in municipal water supply, wastewater treatment, irrigation, industrial water systems, and fire protection. Its non-rising stem design makes it ideal for underground or space-limited installations, ensuring long-term reliable operation.

• 1 1/4"(DN32)-24"(DN600)

• Design Standard: GB/T 26121

• Connection Standard: Flange Drilling to ASME B16.1 CL 125, ASME B16.5 CL 150

• Working Pressure: 300PSI, 250PSI, 200PSI, 175PSI

FLANGED FLEXIBLE RUBBER JOINT WITH SINGLE SPHERE (Single Sphere Flanged Flexible Rubber Joint)

A single sphere flanged flexible rubber joint is a pipeline connecting component made of a rubber sphere, flanges (typically carbon steel or stainless steel), and reinforcement layers (such as nylon cord or steel wire). It is used to absorb vibration, displacement, and noise in piping systems.

Structural Features

• Single Sphere Design: The rubber section is spherical, providing excellent elastic deformation capability.

• Flanged Connection: Equipped with flanges on both ends for easy bolt-fastening installation.

• Reinforcement Layer: Multi-layer fiber or steel wire reinforcement enhances pressure resistance and tensile strength.

Advantages

• Excellent Vibration Damping & Noise Reduction: The rubber's elasticity effectively absorbs pipeline vibrations, reducing noise from pumps, compressors, and other equipment.

• Strong Displacement Compensation: Can withstand axial, lateral, and angular displacement, accommodating thermal expansion, contraction, or pipeline misalignment due to ground settlement.

• Corrosion & Chemical Resistance: Rubber materials (e.g., EPDM, NBR) resist acids, alkalis, oils, and various chemicals, making them suitable for harsh environments.

• Easy Installation & Maintenance: Flanged connection eliminates welding, allowing quick assembly and disassembly, reducing downtime.

• High Pressure & Fatigue Resistance: Reinforced layers enable the joint to withstand high working pressures (typically PN10-PN16) with long-term durability.

• Superior Sealing Performance: Tight integration between rubber and flanges prevents fluid leakage.

Typical Applications

• Water Supply & Drainage Systems: Used in municipal water supply and wastewater treatment plants to mitigate water hammer effects during pump operation.

• HVAC Systems: Connects cooling towers and fan coil units, absorbing thermal expansion in pipelines.

• Industrial Piping: Transports corrosive fluids in chemical and pharmaceutical plants.

• Marine & Offshore Engineering: Compensates for pipeline stress caused by hull deformation and resists seawater corrosion.

• Power & Energy: Used in thermal and nuclear power plant cooling water pipelines for vibration and noise reduction.

• Fire Protection Systems: Connects fire pump pipelines, improving seismic resistance.

Key Considerations for Selection

• Fluid Compatibility: Choose rubber material based on fluid properties (e.g., EPDM for high temperatures, NBR for oil resistance).

• Pressure Rating: Ensure working pressure ≤ joint rating (e.g., PN16).

• Displacement Capacity: Calculate axial/lateral displacement to select the right compensation range.

• Flange Standards: Match pipeline flange standards (e.g., GB, ANSI, DIN).

Difference from Double Sphere Joints

• Single Sphere: Smaller compensation range but higher rigidity, suitable for general displacement scenarios.

• Double Sphere: Greater flexibility and compensation capacity but higher cost, used for large displacements or complex pipelines.