A Single Sphere Joint, also known as a Single Sphere Rubber Expansion Joint, is a flexible connector with a single spherical bellow designed to absorb vibration, noise, and movement in piping systems.
The SFC type generally indicates a Single Flanged Connector, where the rubber body is equipped with flange connections for easy installation in industrial pipelines.
Body
Material: Reinforced synthetic rubber such as EPDM, NBR, Neoprene, or other compounds depending on the conveyed media.
Design: One spherical bellow provides flexibility while maintaining compact length.
Reinforcement
Multi-ply synthetic tire cord fabric, with optional steel wire reinforcement for high-pressure service.
End Fittings
SFC Type: Flanged connections (fixed or floating), in carbon steel, stainless steel, or ductile iron.
Drilled to match standards such as ANSI, JIS, DIN, or BS.
Inner Liner
Rubber compound selected to resist specific fluids—water, oil, chemicals, seawater, etc.
Size Range: DN25 (1") to DN1000 (40") or larger.
Working Pressure: Standard PN10–PN16; higher ratings available on request.
Vacuum Resistance: Up to –650 mmHg with vacuum rings.
Temperature Range: –20 °C to +100 °C (higher available with special compounds).
Movement Capability:
Axial Compression: ~10–20 mm
Axial Elongation: ~5–10 mm
Lateral Deflection: ~10–15 mm
Angular Deflection: up to 10°
HVAC Systems – connects pumps, chillers, and piping to reduce vibration.
Water Supply & Wastewater – flexible connections in pumping stations and treatment plants.
Industrial Piping – chemical plants, power plants, refineries.
Marine Applications – seawater, cooling water, and ballast lines.
Process Equipment – vibration isolation for compressors and machinery.
Compact length – saves space in tight installations.
Cost-effective – generally more economical than twin-sphere designs.
Reduces noise and vibration to protect piping and equipment.
Easy installation – standard flanged ends for quick fitting.
Available in various compounds for compatibility with different media.
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